Which two statements about PPP CHAP authentication are true? (Choose two)

Which two statements about PPP CHAP authentication are true? (Choose two)
A . It is a one-way authentication method
B . It uses a secret password, which is sent across the link for authentication
C . It supports clear-text passwords
D . It is configurable only on PPP callout links
E . It uses a configured username and password to authenticate a host

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Answer: A, E