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To: Praxis who wrote (20735)	3/19/2000 5:48:00 PM
From: D. Newberry	Read Replies (1) \| Respond to of 54805

Hi Praxis, << Just a point regarding your post on switching/routing, switches can operate at layers 2,3,4 routers just 3. >> You are confusing terminology with the actual functions of the different OSI layers. Each layer has its' own functionality and purpose. My point was to differentiate between what NT is doing in the optical switching space and what Cisco is doing with routers. To discuss all the permutations would get us far to deep into the technology for our purposes here. Actually, I knew somebody was going to bring this up <vbg>. Our marketing friends have successfully added confusion to the market by calling everything under the sun a switch. Gotta love em. The point is, layer 3 is the network layer, regardless if you call it layer 3 switching or routing. The term is used loosely, but generally layer 3 switching implies a hardware based ASIC solution while routing is more software based. Both are a network layer function. Regards, DN