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

The correct answer is B. Router(config-if)# ppp authentication chap pap. The correct Cisco IOS command to configure PPP authentication with CHAP as the primary method and PAP as the fallback is: 'ppp authentication chap pap'. When multiple authentication methods are listed on this command, the router tries them in order - CHAP first, then PAP if CHAP

Implement Wide-Area Networks

Question

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

Options

ARouter(config-if)# ppp authentication chap fallback ppp
BRouter(config-if)# ppp authentication chap pap
CRouter(config-if)# authentication ppp chap fallback ppp
DRouter(config-if)# authentication ppp chap pap

How the community answered

(30 responses)

A
3% (1)
B
93% (28)
D
3% (1)

Explanation

The correct Cisco IOS command to configure PPP authentication with CHAP as the primary method and PAP as the fallback is: 'ppp authentication chap pap'. When multiple authentication methods are listed on this command, the router tries them in order - CHAP first, then PAP if CHAP fails or is not supported by the peer. (A) is wrong because 'fallback ppp' is not valid syntax. (C) and (D) are wrong because the correct command starts with 'ppp authentication', not 'authentication ppp'.

Topics

#PPP authentication#CHAP#PAP#serial interface

Community Discussion

No community discussion yet for this question.

Full 200-101 Practice