SK0-005 Question #161: Real Exam Question with Answer & Explanation

Question

A server administrator is completing an OS installation for a new server. The administrator patches the server with the latest vendor-suggested software, configures DHCP, and verifies all network cables are properly connected in the IDF, but there is no network connectivity. Which of the following is the MOST likely reason for the lack of connectivity?

Options

• AThe VLAN Is improperly configured.
• BThe DNS configuration Is invalid.
• CThe OS version is not compatible with the network switch vendor.
• DThe HIDS is preventing the connection.

Explanation

{"question_number": 5, "question_summary": "No network connectivity after OS install despite patching, DHCP config, and verified cabling", "correct_answer": "A. The VLAN is improperly configured", "explanation": "Since physical cabling is confirmed good, DHCP is configured on the server, and the OS is up to date, the most likely culprit is a VLAN misconfiguration on the switch port. If the switchport is assigned to the wrong VLAN or is not trunked/access-configured correctly, the server's traffic will be isolated from the rest of the network and it will fail to obtain a DHCP lease or communicate. DNS misconfiguration (B) would cause name resolution failures but not a complete lack of connectivity. OS-to-switch vendor incompatibility (C) is not a real-world concern at this level. A HIDS (D) might block specific traffic but would not prevent all network connectivity in this scenario.", "generated_by": "claude-sonnet", "llm_judge_score": 4}

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