23 – WAN Technology 13,388 views

Posted by Mo7sin in CCNA WAN, CCNAX (200 - 120) On 29/01/2012 at 1:45 AM

A WAN is a data communications network that covers a relatively broad geographic area and that often uses transmission facilities provided by common carriers, such as telephone companies. WAN technologies generally function at the lower three layers of the OSI reference model: the physical layer, the data link layer, and the network layer.

The following articles provide information about the various protocols and technologies used in WAN environments:

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