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8
WAN Protocols and Design
CCNAs deal with both permanent and dialed WAN connections on routers on a regular
basis. In fact, with the pervasiveness of LAN switches in modern buildings, more
frequently the issues relating to router installation and troubleshooting are about WAN
connections.
This chapter is rather long; if you plan to read the entire chapter, you might want to treat it
as three separate sections. These three major sections are outlined in Table 8-1. The first of
these topical areas discusses point-to-point leased lines. The second covers Frame Relay,
and the last details DDR and ISDN.
Cisco expects CCNAs to be able to configure, verify, and troubleshoot WAN connections.
The conceptual material in this chapter is important, but it is Cisco's desire that the exam
serve as proof that you are able to make this stuff work. Focusing on the command
examples and scenarios will help.
How to Best Use This Chapter
By taking the following steps, you can make better use of your study time:
·
Keep your notes and the answers for all your work with this book in one place, for
easy reference.
·
Take the "Do I Know This Already?" quiz, and write down your answers. Studies
show that retention is significantly increased through writing down facts and
concepts, even if you never look at the information again.
·
Use the diagram in Figure 8-1 to guide you to the next step.
ch08.fm Page 515 Monday, March 20, 2000 5:17 PM