Physical Details of Leased Lines


The leased line service delivers bits in both directions, at a predetermined speed, using full-duplex logic. In fact, conceptually it acts as if you had a full-duplex crossover Ethernet link between two routers, as shown in Figure 3-2. The leased line uses two pairs of wires, one pair for each direction of sending data, which allows full-duplex operation.


Figure 3-2 Conceptual View of the Leased Line Service

Of course, leased lines have many differences compared to an Ethernet crossover cable. To create such ...

Get CCENT/CCNA ICND1 100-101 Official Cert Guide now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.