ccna interview questions and answers

Part - 31 CCNA Interview Questions and Answers

151 Identify 3 characteristics of ISDN?

A.) Transports voice and data

B.) Transports voice only

C.) Support both BRI and PRI

D.) Runs over existing phone lines

E.) Same as X.25

Ans A C D

ISDN supports voice, data, and video. It runs over existing phone lines and supports 128K (BRI) and T1 (PRI).

152 Identify the 3 characteristics of IGRP?

A.) Uses hop count as a metric

B.) Supports multiple unequal paths

C.) Administrative distance is 100

D.) Configured with an Autonomous system number

E.) Link state

Ans B C D

IGRP is a distance vector routing protocol, it's degree of trustworthiness is 100, it can support up to 6 un-equal paths and must be configured with an autonomous system number.

153 Identify 2 features of PPP CHAP authentication?

A.) Username and password is sent in clear text

B.) Authentication messages are sent periodically during the connection

C.) Less secure then PAP

D.) Local router 'challenges' the remote router

Ans B D

PPP CHAP authentication message are sent periodically during the connection by challenging the other end of the connection. It is more secure than PAP and passwords and username are encrypted.

154 Identify the default IPX serial encapsulation?

A.) Novell-Ether

B.) SDLC

C.) SNAP

D.) HDLC

Ans D

The default IPX serial encapsulation is HDLC.

155 Identify the hardware component that stores the backup configuration?

A.) RAM

B.) NVRAM

C.) Flash

D.) ROM

Ans B

NVRAM contains the backup config. RAM is the dynamic memory area, ROM contains the boot strap code and Flash contains the IOS.