What is the primary function of NAC (Network Access Control)?
A CISSP practice question covering Domain 4: Communication and Network Security. Try answering before reading the explanation below.
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Why "Authenticate and posture-check devices before granting network access" is the right answer
NAC verifies device identity and health (patch level, AV state, configuration) before allowing access. 802.1X is a common enforcement mechanism. Posture-failed devices are quarantined. Encryption, DHCP, and VPN are separate functions.
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