IPSec (Internet Protocol Security) can be used to authenticate and encrypt IP traffic. IPSec includes protocols for establishing mutual authentication between agents and negotiating encryption keys for secure communication sessions. It provides a framework of open standards for ensuring private and secure IP communications through cryptographic security services like peer authentication, data authentication, integrity, confidentiality, and replay protection.

1. Which of the following can be used to authenticate and encrypt IP (Internet Protocol) traffic?
A. ESP (Encapsulating Security Payload)
B. S/MIME (Secure Multipurpose Internet Mail Extensions)
C. IPSec (Internet Protocol Security)
D. IPv2 (Internet Protocol version 2)
Solution
The answer is IPSec( Internet Protocol Security).
Internet Protocol Security ( IPsec ) is a protocol suite for secure Internet Protocol (IP)
communications that works by authenticating and encrypting each IP packet of a
communication session. IPsec includes protocols for establishing mutual authentication between
agents at the beginning of the session and negotiation of cryptographic keys to be used during the
session.
Internet Protocol Security (IPSec) is a framework of open standards for ensuring private,
secure communications over Internet Protocol (IP) networks, through the use of cryptographic
security services. IPSec supports network-level peer authentication, data origin authentication,
data integrity, data confidentiality (encryption), and replay protection.