With which technology do apply integrity, confidentially and authenticate the source

With which technology do apply integrity, confidentially and authenticate the source
A . IPSec
B . IKE
C . Certificate authority
D . Data encryption standards

View Answer

Answer: A

Explanation:

IPsec is a collection of protocols and algorithms used to protect IP packets at Layer 3 (hence the name of IP Security [IPsec]). IPsec provides the core benefits of confidentiality through encryption, data integrity through hashing and HMAC, and authentication using digital signatures or using a pre-shared key (PSK) that is just for the authentication, similar to a password.

Source: Cisco Official Certification Guide, IPsec and SSL, p.97