Path: utzoo!utgpu!water!watmath!clyde!rutgers!ames!ucbcad!ucbvax!VENERA.ISI.EDU!braden From: braden@VENERA.ISI.EDU Newsgroups: comp.protocols.tcp-ip Subject: Re: Routers vs. Bridges (CORRECTION) Message-ID: <8712101941.AA23821@braden.isi.edu> Date: 10 Dec 87 19:41:19 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The ARPA Internet Lines: 21 As Bill Westfield immediately pointed out to me (SIX MINUTES later!), my brain was disengaged when I sent a message earlier. Sorry. Here is what I meant to say: ___________________________________________________ Here is one way you might decide if a given box is a bridge or an IP gateway (aka router): see if it forwards a local network broadcast packet. A bridge "must" forward broadcasts, while a gateway "must never" forward one. Another test: see if the destination local network address changes when the packet is forwarded. These two tests give some clues about the advantages of gateways over bridges. Bob Braden ----- End Forwarded Message -----