Which of the following is responsible for maintaining certificates in a public key infrastructure (PKI)?

Which of the following is responsible for maintaining certificates in a public key infrastructure (PKI)?

A.
Domain Controller

B.
Certificate User

C.
Certification Authority

D.
Internet Authentication Server

Explanation:
The Certification Authority is responsible for maintaining certificates in a public key
infrastructure (PKI).
Certification authority (CA) is an entity in a network, which manages security credentials and public
keys for message encryption. It issues
certificates that confirm the identity and other attributes of a certificate in relation to other entities.
Depending on the public key infrastructure
implementation, a certificate includes the owner’s name, the owner’s public key, information about
the public key owner, and the expiry date
of the certificate.
VeriSign is a certification authority that issues digital certificates. A user can request VeriSign to
verify the validity of the certificate.
Answer option B is incorrect. A certificate user is not responsible for maintaining certificates in a
public key infrastructure (PKI).

Answer option D is incorrect. The Internet Authentication Service (IAS) performs centralized
connection authentication, authorization, and
accounting for dial-up and virtual private network (VPN), remote access, and router-to-router
connections.
Answer option A is incorrect. A domain controller is a server that has Active Directory services
installed and running. Domain controllers hold a
full replica of the directory partitions for their domains. They resolve queries for information about
objects in their domain and refer unresolved
queries to domain controllers in other domains. Domain controllers also manage changes to
directory information and are responsible for
replicating those changes to other domain controllers.