ahh - thanks - I'd often wondered about that.
Dave Bremer
>>> gharris@xxxxxxxxx 17/06/04 15:45:33 >>>
On Tue, Jun 15, 2004 at 03:59:53PM -0700, David Wuertele wrote:
> Notice that everything from the client (169.254.242.55) has the same
> Sequence Number. Is that normal when the packet has nothing in it
but
> a TCP Ack?
Yes - in fact, it's what I'd *expect* for a packet with nothing but an
ACK. To quote RFC 793:
The TCP must recover from data that is damaged, lost, duplicated,
or
delivered out of order by the internet communication system. This
is achieved by assigning a sequence number to each octet
transmitted, and requiring a positive acknowledgment (ACK) from
the
receiving TCP.
An ACK-only packet transmits no octets, so it doesn't cause the
sequence
number to change.
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