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CCENT/CCNA ICND1 100-105 Official Certification Guide, First Edition by Wendell Odom

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Chapter 3. Fundamentals of WANs

This chapter covers the following exam topics:

1.0 Network Fundamentals

1.1 Compare and contrast OSI and TCP/IP models

1.6 Select the appropriate cabling type based on implementation requirements

3.0 Routing Technologies

3.1 Describe the routing concepts

3.1.c Frame rewrite

Most Layer 1 and 2 networking technology falls into one of two primary categories: wide-area networks (WAN) and local area networks (LAN). Because both WANs and LANs match OSI Layers 1 and 2, they have many similarities: Both define cabling details, transmission speeds, encoding, and how to send data over physical links, as well as data-link frames and forwarding logic.

Of course, WANs and LANs have many differences as well, most notably the ...

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