Comptia Security Plus Mock Test Q109

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

A. PEAP
B. DNS
C. TLS
D. ICMP

Correct Answer: C
Section: Network Security

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.

Incorrect Answers:
A: Protected Extensible Authentication Protocol (PEAP) encapsulates EAP methods within a TLS tunnel that provides authentication and potentially encryption.

B: Domain name system (DNS) is the hierarchical naming scheme used for public and private networks.

D: ICMP is a protocol that is commonly used by tools such as ping, traceroute, and pathping.

References:
http://en.wikipedia.org/wiki/Transport_Layer_Security
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 42, 47, 61