Section 10. WAN Technologies

Wide-area networks (WAN) connect local-area networks (LAN) that are separated over a geographic distance. WANs usually connect networks through a third-party carrier. These third-party companies are usually telephone or cable companies. The third-party carrier charges the company that connects the networks a monthly fee for the WAN connections.

Currently, several WAN implementations exist. These include point-to-point leased lines, packet-switched lines, and circuit-switched lines. Also, carriers are offering newer implementations such as Ethernet emulation. The ICND1 exam focuses on WAN connectivity over Ethernet emulation; serial connectivity is covered in ICND2.

This section will also introduce you to dynamic routing ...

Get Cisco CCENT ICND1 100-101 Flash Cards and Exam Practice Pack now with O’Reilly online learning.

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