CompTIA Security+ SY0-701 Practice Question

The posture assessment component of a Network Access Control system is responsible for verifying if a connecting device complies with the security policies by checking various attributes like antivirus presence and patch levels. When a device that should be compliant is denied access, the likely culprit is an issue with the posture assessment's recognition of the device's compliance status, which might be caused by misconfiguration or lack of proper updates to the compliance requirements. It's crucial for the NAC setup to correctly and accurately assess devices against the security policy to prevent access issues for compliant devices. In contrast, a Remote Authentication Dial-In User Service (RADIUS) server is primarily concerned with authenticating user credentials, and while it may interface with NAC, it would not perform posture assessment. Captive portals are typically used for user interaction and credential input, and they do not perform posture assessments either. Similarly, policy definitions detail what is required for compliance but wouldn't directly cause access denial if the device meets those requirements.