[net.news] The USENET Backbone

usenet@gatech.CSNET (08/01/85)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 18 July 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari,
uw-beaver--ubc-vision, seismo--mcvax) do not carry all newsgroups,
including some "net" and "mod" newsgroups.  The European component of
Usenet receives a limited number of "net" and "mod" groups, as well as
having a number of active "eur" newsgroups, and exchanges all those
articles via X.25 links.

To send mail the administrators of all the backbone sites, address your
mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual.

Here is the backbone as of 1 August 1985:


 mgnetp--------ihnp4-----------------------cbosgd
                 |                           |
                 |                           |
               alberta      ulysses          |
                 |             |             |
                 |             |             |
              ubc-vision      burl---------clyde--------watmath---------utzoo
                 |                                                       |
                 |                                                       |
              uw-beaver----tektronix--------------------decvax---------linus
                               |                          |              |
                               |                          |              |
                             hplabs-------sdcrdcf        mcnc---------philabs
                               |             |                           |
                               |             |                           |
                              hao         sdcsvax                        |
                               |                                         |
                               |                                         |
              munnari--------seismo------------------------------------cmcl2
                               |
                               |
              kddlab---------mcvax--------<see below>


This is the European backbone:

                         enea   penet   diku
                            \     |     /
                             \    |    /
                              \   |   /
                               \  |  /
		     vmucnam----mcvax------cernvax
                               /  |  \
                              /   |   \
                             /    |    \
                            /     |     \
			 ukc    prlb2   i2unix

usenet@gatech.CSNET (09/01/85)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 13 August 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari,
uw-beaver--ubc-vision, seismo--mcvax) do not carry all newsgroups,
including some "net" and "mod" newsgroups.  The European component of
Usenet receives a limited number of "net" and "mod" groups, as well as
having a number of active "eur" newsgroups, and exchanges all those
articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 September 1985:


 mgnetp--------ihnp4-----------------------cbosgd
                 |                           |
                 |                           |
               alberta      ulysses          |
                 |             |             |
                 |             |             |
              ubc-vision      burl---------clyde--------watmath---------utzoo
                 |                                                       |
                 |                                                       |
              uw-beaver----tektronix--------------------decvax---------linus
                               |                          |              |
                               |                          |              |
                             hplabs-------sdcrdcf        mcnc---------philabs
                               |             |                           |
                               |             |                           |
                              hao         sdcsvax                        |
                               |                                         |
                               |                                         |
              munnari--------seismo------------------------------------cmcl2
                               |
                               |
              kddlab---------mcvax--------<see below>


This is the European backbone:

                         enea   penet   diku
                            \     |     /
                             \    |    /
                              \   |   /
                               \  |  /
		     vmucnam----mcvax------cernvax
                               /  |  \
                              /   |   \
                             /    |    \
                            /     |     \
			 ukc    prlb2   i2unix

usenet@gatech.CSNET (10/01/85)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 12 September 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari,
uw-beaver--ubc-vision, seismo--mcvax) do not carry all newsgroups,
including some "net" and "mod" newsgroups.  The European component of
Usenet receives a limited number of "net" and "mod" groups, as well as
having a number of active "eur" newsgroups, and exchanges all those
articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 October 1985:


	       mgnetp
		 |
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |       |                           |
         |     alberta      ulysses          |
         |       |             |             |
         |       |             |             |
         |    ubc-vision      burl---------clyde--------watmath---------utzoo
         |       |                                                       |
         |       |                                                       |
         |    uw-beaver----tektronix--------------------decvax---------linus
         |                     |                          |              |
         |                     |                          |              |
         ------qantel--------hplabs-------sdcrdcf        mcnc---------philabs
                                             |                           |
                                             |                           |
                              hao         sdcsvax                        |
                               |                                         |
                               |                                         |
              munnari--------seismo------------------------------------cmcl2
                               |
                               |
              kddlab---------mcvax--------<see below>


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (11/01/85)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 23 October 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
uw-beaver--ubc-vision, seismo--mcvax) do not carry all newsgroups,
including some "net" and "mod" newsgroups.  The European component of
Usenet receives a limited number of "net" and "mod" groups, as well as
having a number of active "eunet" newsgroups, and exchanges all those
articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 November 1985:


	       mgnetp
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |     alberta      ulysses          |
         |       |             |             |
         |    ubc-vision      burl---------clyde----watmath----utzoo
         |       |                                               |
         |       |                                             linus
         |       |                                               |
         |    uw-beaver----tektronix---------------------------decvax----mcnc
         |                     |                                 |        |
         |                     | /--------oliveb----glacier----decwrl     |
         |                     |/                                         |
         ------qantel--------hplabs-------sdcrdcf                      philabs
                               |             |                            |
                              hao         sdcsvax                         |
                               |                                          |
              munnari--------seismo-------------------------------------cmcl2
                               |
              kddlab---------mcvax--------<see below>


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (12/01/85)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 28 November 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not carry all
newsgroups, including some "net" and "mod" newsgroups.  The European
component of Usenet receives a limited number of "net" and "mod"
groups, as well as having a number of active "eunet" newsgroups, and
exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 December 1985:


	       mgnetp
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |     alberta      ulysses          |
         |       |             |             |
         |    ubc-vision      burl---------clyde----watmath----utzoo
         |       |                                               |
         |       |                                             linus
         |       |                                               |
         |    uw-beaver----tektronix---------------------------decvax------
         |                     |                                 |        |
    |--qantel----------------\ | /--------oliveb----glacier----decwrl     |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    | (see below)        hao         sdcsvax                         |
    |    |/                    |                                          |
    |  mcvax-----------------seismo--------cmcl2-----------philabs-------mcnc
    |                         /|\                                         |
    ---------lll-crg---------/ | \---------gatech-----------------------akgua
                               |
                             munnari


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (01/01/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 28 November 1985 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not carry all
newsgroups, including some "net" and "mod" newsgroups.  The European
component of Usenet receives a limited number of "net" and "mod"
groups, as well as having a number of active "eunet" newsgroups, and
exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 January 1986:


	       mgnetp
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |     alberta      ulysses          |
         |       |             |             |
         |    ubc-vision      burl---------clyde----watmath----utzoo
         |       |                                               |
         |       |                                             linus
         |       |                                               |
         |    uw-beaver----tektronix---------------------------decvax------
         |                     |                                 |        |
    |--qantel----------------\ | /--------oliveb----glacier----decwrl     |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    | (see below)        hao         sdcsvax                         |
    |    |/                    |                                          |
    |  mcvax-----------------seismo--------cmcl2-----------philabs-------mcnc
    |                         /|\                                         |
    ---------lll-crg---------/ | \---------gatech-----------------------akgua
                               |
                             munnari


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.UUCP (02/01/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 17 January 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not carry all
newsgroups, including some "net" and "mod" newsgroups.  The European
component of Usenet receives a limited number of "net" and "mod"
groups, as well as having a number of active "eunet" newsgroups, and
exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 February 1986:


	       mgnetp
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |     alberta                       |
         |       |                           |
         |    ubc-vision      burl---------clyde----watmath----utzoo
         |       |             |                                 |
         |       |             |                                 |
         |       |          ulysses-------bellcore-----------\  linus
         |       |                                            \  |
         |       |                                             \ |
         |    uw-beaver----tektronix---------------------------decvax------
         |                     |                                 |        |
    |--qantel----------------\ | /--------oliveb----glacier----decwrl     |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    | (see below)        hao         sdcsvax                         |
    |    |/                    |                                          |
    |  mcvax-----------------seismo--------cmcl2-----------philabs-------mcnc
    |                         /|\                                         |
    ---------lll-crg---------/ | \---------gatech-----------------------akgua
                               |
                             munnari


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

mascagni@acf4.UUCP (Michael Mascagni) (03/01/86)

/* acf4:net.news / usenet@gatech.UUCP / 12:18 am  Mar  1, 1986 */
Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 28 February 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 1 March 1986:


	       mgnetp
		 |
         ------ihnp4-----------------------cbosgd
         |       |                           |
         |     alberta                       |
         |       |                           |
         |    ubc-vision      burl---------clyde----watmath----utzoo
         |       |             |                                 |
         |       |             |                                 |
         |       |          ulysses-------bellcore-----------\  linus
         |       |                                            \  |
         |       |                                             \ |
         |    uw-beaver----tektronix---------------------------decvax------
         |                     |                                 |        |
    |--qantel----------------\ | /--------oliveb----glacier----decwrl     |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    | (see below)        hao         sdcsvax                         |
    |    |/                    |                                          |
    |  mcvax-----------------seismo--------cmcl2-----------philabs-------mcnc
    |                         /|\                                         |
    ---------lll-crg---------/ | \---------gatech-----------------------akgua
                               |             |
                             munnari      drillsys


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria
/* ---------- */

usenet@gatech.UUCP (03/02/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 2 March 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).

Here is the backbone as of 2 March 1986:


  cbosgd-----------------------------------clyde---------watmath--------utzoo
    |                                        |                            |
  ihnp4---------------------alberta         burl                        linus
    | \                        |             |                            |
    | mgnetp                uw-beaver      ulysses--------------bellcore  |
    |                          |                                        \ |
    |                      tektronix-----------------------------------decvax
    |                          |                                        / |
  qantel---------------------\ | /---------oliveb-----glacier-----decwrl  |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    |  (see below)       hao         sdcsvax                         |
    |    |  /                  |             |                            |
    |    | /                   |          drillsys                        |
    |    |/                    |             |                            |
    |  mcvax-----------------seismo--------gatech----------akgua---------mcnc
    |                         /|\                                         |
 lll-lcc-----lll-crg---------/ | \---------cmcl2-----------------------philabs
                               |
                             munnari      


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (04/01/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 20 March 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).


Here is the backbone as of 1 April 1986:


  cbosgd-----------------------------------clyde---------watmath--------utzoo
    |                                        |                            |
  ihnp4-------alberta------ubc-vision       burl                        linus
    | \                        |             |                            |
    | mgnetp                uw-beaver      ulysses--------------bellcore  |
    |                          |                                        \ |
    |                      tektronix-----------------------------------decvax
    |                          |                                        / |
  qantel---------------------\ | /---------oliveb-----glacier-----decwrl  |
    |                         \|/                                         |
    |  kddlab----------------hplabs-------sdcrdcf                         |
    |    |                     |             |                            |
    |    |                     |          sdcsvax                         |
    |    |  (see below)       hao            |                            |
    |    | /                   |          drillsys                        |
    |    |/                    |             |                            |
    |  mcvax-----------------seismo--------gatech----------akgua---------mcnc
    |                         /|\                                         |
 lll-lcc-----lll-crg---------/ | \---------cmcl2-----------------------philabs
                               |
                             munnari      


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (05/04/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 5 April 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).  (In Europe uucp map
entries are obtained through the national backbone's "netdir"
service).



Here is the backbone as of 3 May 1986 (dotted lines show restricted links):


 cbosgd-----------------------------------clyde---------watmath........utzoo
   |                                        |                            :
 ihnp4-------alberta------ubc-vision       burl                          :
   | \                        :             |                            :
   | cuae2                 uw-beaver      ulysses-------------bellcore   :
   |                          |                                  |       :
   |                      tektronix---------------------------decvax---linus
   |                          |                                / |       | 
 qantel--------------------\  | oliveb------glacier------decwrl  |       |
   |                        \ | /                                |       |
   |  kddlab----------------hplabs-------sdcrdcf                 |       |
   |    |                     :             |                    |       |
   |    |                     :          sdcsvax                 |       |
   |    |  (see below)       hao            |                    |       |
   |    | /                   :          drillsys                |       |
   |    |/                    :             |                    |       |
   |  mcvax.................seismo........gatech-----akgua-----mcnc----philabs
   |                         /:\                                         |
lll-lcc-----lll-crg---------/ : \--------------------------------------cmcl2
                              :
                            munnari      


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			vmucnam -> France
    vmucnam--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (06/03/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 30 April 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your milage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).  (In Europe uucp map
entries are obtained through the national backbone's "netdir"
service).



Here is the backbone as of 2 June 1986 (dotted lines show restricted links):


 cbosgd-----------------------------------clyde---------watmath........utzoo
   |                                        |                            :
 ihnp4-------alberta------ubc-vision       burl                          :
   | \                        :             |                            :
   | cuae2                 uw-beaver      ulysses-------------bellcore   :
   |                          |                                  |       :
   |                      tektronix---------------------------decvax---linus
   |                          |                                / |       | 
 qantel--------------------\  | oliveb------glacier------decwrl  |       |
   |                        \ | /                                |       |
   |  kddlab----------------hplabs-------sdcrdcf                 |       |
   |    |                     :             |                    |       |
   |    |                     :          sdcsvax                 |       |
   |    |  (see below)       hao            |                    |       |
   |    | /                   :          drillsys                |       |
   |    |/                    :             |                    |       |
   |  mcvax.................seismo........gatech-----akgua-----mcnc----philabs
   |                         /:\                                         |
lll-lcc-----lll-crg---------/ : \--------------------------------------cmcl2
                              :
                            munnari      


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			inria -> France
      inria--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (07/01/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 25 June 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your mileage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).  (In Europe uucp map
entries are obtained through the national backbone's "netdir"
service).



Here is the backbone as of 1 July 1986 (dotted lines show restricted links):


 cbosgd-----------------------------------clyde---------watmath........utzoo
   |                                        |                            :
 ihnp4-------alberta------ubc-vision       burl                          :
   | \                        :             |                            :
   | cuae2                 uw-beaver      ulysses-------------bellcore   :
   |                          |                                  |       :
   |                      tektronix---------------------------decvax---linus
   |                          |                                / |       | 
 qantel--------------------\  | oliveb------glacier------decwrl  |       |
   |                        \ | /                                |       |
   |  kddlab----------------hplabs-------sdcrdcf                 |       |
   |    |                     :             |                    |       |
   |    |                    hao         sdcsvax                 |       |
   |    |  (see below)        :             |                    |       |
   |    | /                 nbires       drillsys                |       |
   |    |/                    :             |                    |       |
   |  mcvax.................seismo........gatech-----akgua-----mcnc----philabs
   |                         /:\                                         |
lll-lcc-----lll-crg---------/ : \--------------------------------------cmcl2
                              :
                            munnari      


This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			inria -> France
      inria--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   vmars  ukc    prlb2   i2unix         vmars -> Austria

usenet@gatech.CSNET (09/01/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 31 August 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your mileage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).  (In Europe uucp map
entries are obtained through the national backbone's "netdir"
service).



Here is the backbone as of 1 September 1986 (dotted lines show restricted links):

---------------------------------------------
|                                           | 
|   cbosgd------------------cbatt---------clyde---------watmath............utzoo
|     |                                     |                                 |
|   ihnp4-----alberta-----ubc-vision       burl                               |
|     | \                     :             |                                 |
|     | cuae2              uw-beaver      ulysses-------------bellcore        |
|     |                       |                                  |            |
|     |                   tektronix---------------------------decvax---linus  |
|     |                       |                                / |       |    |
|   qantel-----------------\  | oliveb------glacier------decwrl  |       |    |
|     |                     \ | /                                |       |    |
|     |  kddlab-------------hplabs-------sdcrdcf                 |       |    |
|     |    |                  :             |                    |       |    |
|     |    |                 hao         sdcsvax                 |       |    |
|     |    |  (see below)     :                                  |       |    |
|     |    | /              nbires                               |       |    |
|     |    |/                 |                                  |       |    |
|     |  mcvax.............   |   ........gatech-----akgua----mcnc---philabs  |
|     |                    \  |  /                                       |    |
|  lll-lcc-----lll-crg------seismo------------------------------------cmcl2   |
|                 |        / |  | \                                           |
----------------caip------/  |  |  \--------------------------------------mnetor
                  |         /    \
   	         nike------/      \......munnari

This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			inria -> France
      inria--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   tuvie  ukc    prlb2   i2unix         tuvie -> Austria

usenet@gatech.EDU (11/02/86)

Original-from: Gene Spafford (gatech!spaf)
[Most recent change: 18 October 1986 by spaf]

A Usenet "backbone" site is one which exchanges every (non-local) news
article it receives with at least two other backbone sites; or which is
the main newsfeed for a particular area (e.g., Australia) and exchanges
news with at least one other backbone site.  This exchange is done
(theoretically) with minimum delay.  Thus, any article submitted to a
backbone site is supposed to propagate to all other backbone sites
within a very short time period. (Under actual conditions, your mileage
may vary.)

Each backbone site normally feeds some number of well-connected
secondary sites, most of which are not "leaf" (terminal) nodes.
These secondary sites feed the news out to other distribution and leaf
nodes, and so on.

For optimal news distribution, each site should establish an "L" type
link with a site closely connected to a backbone site. This will help
ensure that any articles submitted from that site get propagated to the
whole net with a minimum of delay.  Sites should *not* request a news
feed from a backbone site unless they are willing to feed at least five
or six (or more) other, non-terminal sites.

Note that some backbone links (viz., seismo--munnari, utzoo--ALL,
hao--ALL, uw-beaver--ubc-vision, seismo--mcvax, seismo--gatech) do not
carry all newsgroups, including some "net" and "mod" newsgroups.  The
European component of Usenet receives a limited number of "net" and
"mod" groups, as well as having a number of active "eunet" newsgroups,
and exchanges all those articles via X.25 links.

To send mail to the administrators of all the backbone sites, address
your mail to "backbone@cbosgd.UUCP".  If you wish to send mail to the
administrator of a particular site, consult the uucp map for the name
and address of the appropriate individual(s).  (In Europe uucp map
entries are obtained through the national backbone's "netdir"
service).



Here is the backbone as of 1 November 1986 (dotted lines show 
restricted links):

------------------------------------------
|                                        |
|  cbatt-------------------------------clyde--------watmath..........utzoo
|    |                                   | \                            |
|    |  /----------------------------\   |  \-----------bellcore        |
|    | /                              \  |                 | \          |
|  ihnp4-----alberta----ubc-vision     cuae2               |  ulysses   |
|    |                      :            |                 |            |
|    |                   uw-beaver   (to gatech)           |            |
|    |                      |                              |            |
|    |                  tektronix-----------------------decvax---linus  |
|    |                      |                            / |       |    |
|    |                      |  (to nike)                /  |       |    |
|    |                      |    |                     /   |       |    |
|  qantel----------------\  | oliveb----glacier----decwrl  |       |    |
|    |                    \ | /                            |       |    |
|    |  kddlab------------hplabs------sdcrdcf              |       |    |
|    |    |                 :                              |       |    |
|    |    |                hao                             |       |    |
|    |    |  (see below)    :         (to cuae2)           |       |    |
|    |    | /             nbires          |                |       |    |
|    |    |/                |             |                |       |    |
|    |  mcvax............   |   .......gatech---akgua---mcnc---philabs  |
|    |                   \  |  /                                   |    |
| lll-lcc-----lll-crg-----seismo--------------------------------cmcl2   |
|                |       / |  | \                                       |
--------------rutgers---/  |  |  \----------------------------------mnetor
                 |        /    \
  (to oliveb)---nike-----/      \......munnari

This is the European backbone (mcvax feeds all of them):

           penet  enea   diku   unido           penet -> Finland
             |      \     |     /		enea -> Sweden
             |       \    |    /		diku -> Denmark
             |        \   |   /			unido -> W. Germany
             |         \  |  /			inria -> France
      inria--+----------mcvax------cernvax	mcvax -> Netherlands
             |         /  |  \			cernvax -> Switzerland
             |        /   |   \			ukc -> Great Britain
             |       /    |    \		prlb2 -> Belgium
             |      /     |     \		i2unix -> Italy
	   tuvie  ukc    prlb2   i2unix         tuvie -> Austria