Which security protocol introduces vulnerabilities because the password is sent in plaintext and
can be intercepted and easily read?

A.
WEP

B.
EAP

C.
PAP

D.
CHAP

Explanation:
PAP transmits unencrypted ASCII passwords over the network and is therefore
considered insecure. It is used as a last resort when the remote server does not support a
stronger authentication protocol, like CHAP or EAP (the latter is actually a framework).