Correct Answer : Challenge Handshake Authentication Protocols
Explanation : The term "CHAP" stands for the Challenge Handshake Authentication Protocols. In computer networks, it can be defined as an authentication scheme that avoids the transfer of unencrypted passwords over the network. The "CHAP" is one of the many authentication schemes used by the Point To Point Protocol (PPP), which is a serial transmission protocol for Wide Networks Connections (WAN).