[comp.protocols.tcp-ip] UDP vs TCP

jeff@hpctdkz.HP.COM (Jeff Hughes) (06/06/89)

I am trying to determine where the TCP port list and the UDP port list
differ. Obviously, certain protocols such as TELNET and FTP do not run
on top of UDP.                      

RFC1010 gives a list of assigned port numbers and states "To the extent
possible, these same port assignments are used with the UDP." Can someone
direct me to an official UDP list? Are any of the port numbers given in
RFC1010 redefined for UDP or is it simply that UDP does not use some of
the assigned port numbers?

                            
Any help would be appreciated.

                          jeff (hpctdkz.hp.com)

postel@VENERA.ISI.EDU (07/23/89)

Jeff:

There is one list of port number assignments used by both UDP and TCP.
If it makes sense to run a particular protocol on TCP, then use the number
from the list as a TCP port. If it makes sense to run a particular protocol 
on UDP, then use the number from the list as a UDP port. 

--jon.