Which functions are performed by the IAS (Internet Authentication Service)?

Which functions are performed by the IAS (Internet Authentication Service)?

• A. DNS resolution and name service.
• B. Accounting, auditing, centralized authentication, and authorization.
• C. DHCP IP address assignment.
• D. Firewall policy enforcement.

Answer: (B)

The function being tested is centralizing access control for a network. Internet Authentication Service provides authentication, authorization, and accounting, plus auditing, all in one place. It verifies who a user is (authentication), determines what that user is allowed to do or which resources they may access (authorization), and records usage data for tracking and billing purposes (accounting). Auditing enhances security by keeping detailed logs of access attempts and policy decisions. This fits RADIUS-style network access control for services like VPNs, dial-up, or wireless access, commonly integrating with directory services for credentials and policy enforcement. It does not handle DNS resolution (that’s a DNS server), DHCP IP assignment (that’s a DHCP server), or firewall policy enforcement (that’s a firewall).

The function being tested is centralizing access control for a network. Internet Authentication Service provides authentication, authorization, and accounting, plus auditing, all in one place. It verifies who a user is (authentication), determines what that user is allowed to do or which resources they may access (authorization), and records usage data for tracking and billing purposes (accounting). Auditing enhances security by keeping detailed logs of access attempts and policy decisions. This fits RADIUS-style network access control for services like VPNs, dial-up, or wireless access, commonly integrating with directory services for credentials and policy enforcement. It does not handle DNS resolution (that’s a DNS server), DHCP IP assignment (that’s a DHCP server), or firewall policy enforcement (that’s a firewall).