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Home > Archive > CCNA > December 2001 > Wan Tecnology
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| Regarding wan technology most cisco books says it operates on layer 1 and 2, but the cisco web site also includes layer 3"
Let me paste you what CISCO academy books says:
"A WAN (wide area network) operates at the physical layer and the data link layer of the OSI reference model."
From their web site:
WAN technologies function at the lower three layers of the OSI reference model: the physical layer, the data link layer, and the network layer.
OK, now what the right answer for this?
can anyone explain to me. Thanx
rumi | |
| dmaftei 2001-12-15, 9:25 am |
| Some WAN technologies, like X.25, operate at physical/datalink/network. I would go with the web site. | |
| kneto 2001-12-15, 10:18 am |
| I agree !!!
X.25 defines virtual circuits at the Network level of OSI.
Hope this will help !
//
The Swede | |
| pcwizzard 2001-12-15, 4:39 pm |
| WAN's by themselves do operate at the Physical and Data Link layers of the OSI Model.
I think where youre getting confused is when they dicuss WAN Technologies/Protocols which operate at the Physical, Data Link, and Network layer of the OSI Model.
Thats just my opinion..... |
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