After a malicious actor used an open port in a company's lobby, a network architect...

Comprehensive and Detailed Explanation From Exact Extract:

Network Access Control (NAC) evaluates the posture of a device before allowing access to the network. It can enforce security policies, authenticate users and devices, and isolate or remediate non-compliant devices. NAC is widely used in enterprise environments to secure access at the network edge, such as in guest or public areas.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Access Control and Posture Assessment”:

“NAC provides device authentication, security posture validation, and can enforce automated remediation or quarantine actions based on policy compliance.”

Other options:

A. IPS detects and prevents known threats but does not perform access control or posture checks.

B. Microsegmentation isolates workloads but lacks posture checks and auto-remediation.