Final answer:
Authentication protocols are the rules that computers use to verify the identity of users or devices and these include PAP, CHAP, and EAP. They use methods like passwords and digital certificates to securely allow access.
Step-by-step explanation:
Authentication protocols are the rules that computers follow to accomplish authentication.
These protocols ensure that a user or device is in fact who or what it claims to be before granting access to sensitive data or systems.
Common examples of authentication protocols include the Password Authentication Protocol (PAP), Challenge-Handshake Authentication Protocol (CHAP), and the Extensible Authentication Protocol (EAP).
During the authentication process, protocols may use various methods such as passwords, digital certificates, smart cards, or biometrics to verify identity.
The security provided by these protocols is crucial in preventing unauthorized access and maintaining the integrity of digital communication.