RE: [suse-security] Router and Bridges
A bridge will forward any packet that hits it, while a router is more selective, it will only forward when the packet destination is not in the local subnet. Depending on the network traffic bridges tend to cause broadcast storms (because they will forward any broadcast messages) with can impair performance. David Scott -----Original Message----- From: Holger van Lengerich [mailto:hvl@paderlinx.de] Sent: Thursday, October 12, 2000 5:34 AM To: Steffen Beck Cc: suse-security@suse.com Subject: Re: [suse-security] Router and Bridges On 12 Oct 2000, Steffen Beck wrote:
Hi all ..
Can anyone tell me specifically what the difference is between a router and a bridge ? ..
Thanks Systemx
A Router forwards network-packets on OSI-layer 3 (e.g. IP, IPX). A Bridge forwards packets on OSI-layer 2 (e.g. Ethernet/IEEE802.3, FDDI). Regards, Holger ----------------------------------------------------------------------- Holger van Lengerich paderLinx - Neue Informationsmedien GmbH Diplom-Informatiker Cheruskerstrasse 2b, 33102 Paderborn Holger.van.Lengerich@paderlinx.de Fon: +49 5251 8994 - 16 Fax: -20 ----------------------------------------------------------------------- --------------------------------------------------------------------- To unsubscribe, e-mail: suse-security-unsubscribe@suse.com For additional commands, e-mail: suse-security-help@suse.com
A bridge will forward any packet that hits it, <...>
Nope, by definition a bridge will only forward packets to the subnet where the destination is listening. A repeater would forward any traffic. Regards, Holger ----------------------------------------------------------------------- Holger van Lengerich paderLinx - Neue Informationsmedien GmbH Diplom-Informatiker Cheruskerstrasse 2b, 33102 Paderborn Holger.van.Lengerich@paderlinx.de Fon: +49 5251 8994 - 16 Fax: -20 -----------------------------------------------------------------------
On Fri, 13 Oct 2000, Holger van Lengerich wrote:
A bridge will forward any packet that hits it, <...>
Nope, by definition a bridge will only forward packets to the subnet where the destination is listening. A repeater would forward any traffic.
Right, but AFAIK a bridge knows nothing about (IP-) subnets but only about (Ethernet) Segments which might be coincident. A bridge only looks at Ethernet headers, only a router looks at IP headers. But these days most "real" devices are mixtures of both. Robert -- Robert Casties --------------------- http://philoscience.unibe.ch/~casties History & Philosophy of Science Tel: +41/31/631-8505 Room: 216 Institute for Exact Sciences Sidlerstrasse 5, CH-3012 Bern Uni Bern (PGP key on homepage: D7 2B DE 64 2D 65 16 A0)
participants (3)
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Holger van Lengerich
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Robert Casties
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Scott, David