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

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

A.
(config-if)# authentication ppp chap fallback ppp

B.
(config-if)# authentication ppp chap pap

C.
(config-if)# ppp authentication chap pap

D.
(config-if)# ppp authentication chap fallback ppp

One Comment on “Which command is used to enable CHAP authentication whit PAP as the fallback method on a serial interface?

  1. Sekhar says:

    Explanation

    Router(config-if)#ppp authentication chap pap
    Defines that the link will use CHAP authentication, but will try PAP if CHAP fails or is rejected by other side.


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