PAP
Password Authentication Protocol
A legacy authentication protocol that transmits passwords in cleartext.
Password Authentication Protocol is a legacy authentication method that transmits credentials in cleartext, making them trivial to capture with a network sniffer. Because it offers no encryption or challenge-response protection, it is considered insecure and should be avoided on untrusted links. CHAP improves on PAP by using a challenge-response exchange that never sends the password directly, and modern deployments rely on protocols protected by TLS tunnels such as PEAP. PAP may still appear inside an encrypted tunnel where the outer layer provides confidentiality.
Password Authentication Protocol: sends the password in the clear. Plain = unsafe.
Looking PAP up is step one. Getting tested on it is step two.
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