Path: utzoo!attcan!uunet!image.soe.clarkson.edu!news From: nelson@sun.soe.clarkson.edu (Russ Nelson) Newsgroups: comp.protocols.tcp-ip Subject: Re: Using the 4.2 broadcast addr with 4.3 systems Message-ID: Date: 3 Sep 89 14:37:26 GMT References: <[A.ISI.EDU].1-Sep-89.05:34:13.CERF> <8909011945.AA00826@cincsac.arc.nasa.gov> Sender: news@sun.soe.clarkson.edu Reply-To: nelson@clutx.clarkson.edu Organization: Clarkson University, Potsdam NY Lines: 17 In-reply-to: medin@NSIPO.NASA.GOV's message of 1 Sep 89 19:45:34 GMT In article <8909011945.AA00826@cincsac.arc.nasa.gov> medin@NSIPO.NASA.GOV ("Milo S. Medin", NASA ARC NSI Project Office) writes: If you get a packet recieved via link level broadcast .. you end up throwing away info you hear at layer 2, and then trying to make up for it by using some incomplete hueristic at layer 3. This is a case where violating layering by passing info from layer 2 to layer 3 wins big. But are you *really* violating layering? All you're passing is an indication that the packet in question was broadcast, not *how* it was broadcast. You can get *too* silly about layering. After all, if you don't pass any information at all, you have *perfect* information hiding between layers. :-) -- --russ (nelson@clutx [.bitnet | .clarkson.edu])|(70441.205@compuserve.com)| (Russ.Nelson@f360.n260.z1.fidonet.org)|(BH01@GEnie.com :-)