| 1.1 Providing Integrated Services to the Enterprise |
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| 1.1.1 Introducing Wide Area Networks (WANs) |
| 1.1.2 The Evolving Enterprise |
| 1.1.3 The Evolving Network Model |
| 1.2 WAN Technology Concepts |
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| 1.2.1 WAN Technology Overview |
| 1.2.2 WAN Physical Layer Concepts |
| 1.2.3 WAN Data Link Layer Concepts |
| 1.2.4 WAN Switching Concepts |
| 1.3 WAN Connection Options |
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| 1.3.1 WAN Link Connection Options |
| 1.3.2 Dedicated Connection Link Options |
| 1.3.3 Circuit Switched Connection Options |
| 1.3.4 Packet Switched Connection Options |
| 1.3.5 Internet Connection Options |