CCNA Questions

Which PPP authentication methods will you use when configuring PPP on an interface of a Cisco router?
(Select two options.)

A. SSL
B. SLIP
C. PAP
D. LAPBc
E. CHAP
F. VNP


Answer :
Answer: C E
Explanation:
Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP)
authenticate the endpoints on either end of a point-to-point serial link. Chap is the preferred method today
because the identifying codes flowing over the link are created using a MD5 one-way hash, which is more
secure that the clear-text passwords sent by PAP.