WAN

Question 1

Which PPP subprotocol negotiates authentication options?

Answer 1

LCP

Question 2

A network administrator needs to configure a serial link between the main office and a remote location. The router at the remote office is a non-Cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?

Answer 2

Main(config)# interface serial 0/0 Main(config-if)# ip address 172.16.1.1 255.255.255.252 Main(config-if)# encapsulation ppp Main(config-if)# no shut

Question 3

Which two options are valid WAN connectivity methods?

Answer 3

1. PPP
2. DSL

Question 4

Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?

Answer 4

PPP

Question 5

Which command is used to enable CHAP authentication with PAP as the fallback method on a serial interface?

Answer 5

(config-if)# ppp authentication chap pap

Question 6

Which of the following describes the roles of devices in a WAN?

Answer 6

1. A CSU/DSU terminates a digital local loop
2. A modem terminates an analog local loop
3. A router is commonly considered a DTE device

Question 7

Which two statements about using the CHAP authentication mechanism in a PPP link are true?

Answer 7

1. CHAP uses a three-way handshake.
2. CHAP authentication periodically occurs after link establishment.

Question 8

What is the purpose of Inverse ARP?

Answer 8

To map a known DLCI to an IP Address