CCNA Cisco Certified Network Associate (#679)

Section: Version 2.0

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

CHAP uses a two-way handshake
CHAP authentication periodically occurs after link establishment
CHAP has no protection from playback attacks
CHAP authentication is performed only upon link establishment
CHAP uses a three-way handshake
CHAP authentication passwords are sent in plaintext