DCP@QUABBIN.SCRC.Symbolics.COM.UUCP (06/24/86)
According to the spec, a segment that is not in the window is considered
"unacceptable" and elicits an ACK (with zero segment text). This allows
one to probe a zero window with the next sequence number out of the
window (in case the window is open, but the segments conveying that
informatin were lost). In theory, an implementation is allowed to
completely ignore the window and it will work, but that is anti-social.
My question: Is it considered "correct" to probe a zero window with only
one byte, or is it still polite to probe it with some larger number that
presumably fits in one segment (e.g., 1400+ on Ethernets)?
[BTW, the first time I tried to send this message, I got this
non-completion reply:
Unable to deliver letter to the following recipient:
tcp-ip@SRI-NIC.ARPA: SMTP error from SRI-NIC: 500 Syntax error or field too long: MAIL From: <DCP@STONY-BROOK.SCRC.Symbolics.COM>
]