Traditional Layer 2 WAN technologies, such as leased lines and Frame
Relay, are options that are widely used. However, a new trend is to use the public Internet
by creating site-to-site and remote-access Virtual Private Networks (VPN) because VPNs
are less expensive, more secure, and easier to scale.
Example 8-12 Con?¬?rming Broadcast Traf?¬?c Capability
RouterX# sshhooww ffrraammee--rreellaayy mmaapp
Serial0/0/0 (up): ip 10.140.1.1 dlci 100(0x64,0x1840), dynamic,
broadcast,
CISCO, status defined, active
Review Questions 355
Review Questions
Use the questions here to review what you learned in this chapter. The correct answers and
solutions are found in the appendix, ???Answers to Chapter Review Questions.???
1. Which feature does PPP use to encapsulate multiple protocols?
a. NCP
b. LCP
c. IPCP
d. IPXCP
2. What is the purpose of LCP?
a. To perform authentication
b. To negotiate control options
c. To encapsulate multiple protocols
d. To specify asynchronous versus synchronous
3. Which packet type is used in the PPP link establishment phase?
a. LCP
b. PAP
c. NCP
d. CHAP
4. Which of the following statements best describe CHAP? (Choose two.
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