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From: karels%okeeffe@UCBVAX.BERKELEY.EDU.UUCP
Newsgroups: comp.protocols.tcp-ip
Subject: Re: question about berkeley TCP/IP
Message-ID: <8706291815.AA06076@okeeffe.Berkeley.EDU>
Date: Mon, 29-Jun-87 14:15:04 EDT
Article-I.D.: okeeffe.8706291815.AA06076
Posted: Mon Jun 29 14:15:04 1987
Date-Received: Tue, 30-Jun-87 04:40:50 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 7

Of course a Berkeley host can send a SYN-ACK in response to an incoming SYN
without doing an ARP request!  If you got the SYN to it, you must have
sent an ARP request at some time (all of this assuming the hosts are
on the same Ethernet).  When the ARP request was received and processed,
the hardware address for your machine was added to the ARP cache.

		Mike