CCNA Routing and Switching
HuPe306583u
HuPe306583u
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Chapter 13: Implementing Point-to-Point WANs 359<br />
Review All the Key Topics<br />
Table 13-9 Key Topics for Chapter 13<br />
Key Topic Element Description<br />
Table 13-3 Speeds for WAN links per the T-carrier system 334<br />
Figure 13-7 Role of the CSU/DSU <strong>and</strong> the router as DCE <strong>and</strong> DTE 335<br />
List PPP features 340<br />
List Comparison of PPP LCP <strong>and</strong> NCP 341<br />
Figure 13-13 Example of messages sent by PAP 342<br />
Figure 13-14 Example of messages sent by CHAP 343<br />
Figure 13-16 Sample PAP configuration 346<br />
List MLPPP major configuration concepts 349<br />
Figure 13-21 Sample MLPPP configuration 350<br />
Key Terms You Should Know<br />
Page Number<br />
leased line, telco, serial link, WAN link, T1, DS0, DS1, T3, customer premises equipment,<br />
CSU/DSU, serial cable, DCE, DTE, HDLC, PPP, CHAP, PAP, IP Control Protocol, keepalive,<br />
Link Control Protocol, Multilink PPP<br />
Comm<strong>and</strong> References<br />
Tables 13-10 <strong>and</strong> 13-11 list configuration <strong>and</strong> verification comm<strong>and</strong>s used in this chapter.<br />
As an easy review exercise, cover the left column in a table, read the right column, <strong>and</strong> try<br />
to recall the comm<strong>and</strong> without looking. Then repeat the exercise, covering the right column,<br />
<strong>and</strong> try to recall what the comm<strong>and</strong> does.<br />
Table 13-10 Chapter 13 Configuration Comm<strong>and</strong> Reference<br />
Comm<strong>and</strong><br />
Description<br />
encapsulation {hdlc | ppp}<br />
[no] shutdown<br />
clock rate speed<br />
b<strong>and</strong>width speed-kbps<br />
description text<br />
ppp authentication {pap |<br />
chap}<br />
username name password<br />
secret<br />
ppp pap sent-username<br />
name password secret<br />
Interface subcomm<strong>and</strong> that defines the serial data-link protocol<br />
Administratively disables (shutdown) or enables (no shutdown)<br />
the interface in whose mode the comm<strong>and</strong> is issued<br />
Serial interface subcomm<strong>and</strong> that, when used on an interface<br />
with a DCE cable, sets the clock speed in bps<br />
Interface subcomm<strong>and</strong> that sets the router’s opinion of the link<br />
speed, in kilobits per second, but has no effect on the actual<br />
speed<br />
Interface subcomm<strong>and</strong> that can set a text description of the<br />
interface<br />
Interface subcomm<strong>and</strong> that enables only PAP or only CHAP<br />
authentication<br />
Global comm<strong>and</strong> that sets the password that this router expects<br />
to use when authenticating the router with the listed hostname<br />
Interface subcomm<strong>and</strong> that defines the username/password pair<br />
sent over this link when using PAP authentication<br />
13
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