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Building Resilient IP Networks by Kok-Keong Lee, - CCIE No. 8427

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Chapter 6. Access Module

This chapter covers the following topics:

Multilayer Campus Design

Access Module Building Blocks

Layer 2 Domain

Layer 3 Domain

The access module is a network’s interface to the users or end stations, and challenges in the access module are often related to the physical or Layer 2 connectivity problems. Many Layer 2 technologies can be used to build the access module; however, the focus of this chapter is on the Ethernet technology because Ethernet has emerged as the de facto connectivity standard for end devices.

The ubiquity of the Ethernet technology lies in its simplicity and cost-effectiveness. The availability of Layer 3 switching technology brings IP and Ethernet together, and this has a profound impact ...

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