CCNA Cisco Certified Network Associate (#468)

Section: Version 2.0

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

(config-if)#authentication ppp chap fallback ppp
(config-if)#authentication ppp chap pap
(config-if)#ppp authentication chap pap
(config-if)#ppp authentication chap fallback ppp