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Strategies & Market Trends : Gorilla and King Portfolio Candidates

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To: D. Newberry who wrote (20655)	3/19/2000 4:58:00 PM
From: Praxis	Read Replies (1) of 54805

Just a point regarding your post on switching/routing, switches can operate at layers 2,3,4 routers just 3. I can point you to at least half a dozen manufacturers that carry both. Your point about layer 3 is incorrect, it examines strictly the IP addressing info to determine addressing and sub-net/gateway info, not ports. Port delivery is a layer 4 responsibility(transport layer TCP/UDP)The main difference is that a switch doesn't store the routing tables and distance-vectoring algorithms. A router is often included as part of a switch. A gateway can operate at all 7 layers of the OSI. But you're correct a detailed discussion would be long, here is a link with further links that gives a brief definition,function and ability of routers,switches,hubs,gateways. performancecomputing.com whatis.com

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