A company has a private cloud NAC solution in place to prevent unauthorized/non-company assets from connecting to the internal network. A cloud systems administrator cannot add a new physical server t

Question

Options

• AServer objects were deleted.
• BThe DNS and DHCP servers are down.
• CThe new physical server has a faulty NIC.
• DServer MAC addresses are not being updated.

• A
  83% (24)
• B
  3% (1)
• C
  3% (1)
• D
  10% (3)

Explanation

A Network Access Control (NAC) solution enforces access policies by verifying device identity before allowing network connectivity. In enterprise environments, NAC commonly authenticates servers using directory service objects (e.g., Active Directory computer accounts). If those server objects were deleted, the NAC system no longer recognizes the servers as authorized - blocking them from joining the network and, therefore, the cluster.

• A (Server objects were deleted) : The most likely cause. If computer/server objects are removed from the directory, NAC authentication fails for those devices specifically, preventing cluster integration while the rest of the network continues functioning normally.
• B (DNS and DHCP down): This would cause broad, organization-wide network failures affecting all devices - not an isolated issue with one new server.
• C (Faulty NIC): A faulty NIC would result in complete network failure at the physical layer, not selective NAC-level blocking.
• D (MAC addresses not being updated): While MAC-based authorization is used in some NAC implementations, 'not being updated' is a vague condition; deleted objects is a more precise and likely cause of authentication failure.

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