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Authorized Self-Study Guide Interconnecting Cisco Network Devices, Part 1 (ICND1), Second Edition by Steve CCIE No. 6108 McQuerry

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Chapter 5. WAN Connections

When sites are located at different geographic locations, a WAN provides interconnections between the sites. WANs are most often charge-for-service networks, enabling you to access resources across a wide geographical area. Several types of WANs exist, including point-to-point leased lines, circuit-switched networks, and packet-switched networks. Also, many physical network devices are used in the WAN, as well as many access and encapsulation technologies such as digital ...

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