Which of the following protocols is used to authenticate the client and server’s digital certificate?

A.
PEAP

B.
DNS

C.
TLS

D.
ICMP

Explanation:
Transport Layer Security (TLS) is a cryptographic protocol designed to provide communications security over a
computer network. It uses X.509 certificates and hence asymmetric cryptography to authenticate the
counterparty with whom it is communicating, and to exchange a symmetric key.