200-901 Question #604: Real Exam Question with Answer & Explanation

Question

An engineer must investigate the problems on a web application and address them to related teams. The engineer verifies the application reachability from the single public IP address with port and discovers that HTTPS access works to three servers of a network farm with IP 172.16.50.1 .2 and .4, but HTTPS access to the server with IP 172.16.50.3 does not work. Which problem type must be addressed as the cause for the case?

Options

• AVPN connectivity
• BNAT
• Cblocked transport port
• Dproxy

Explanation

{"question_number": 6, "question": "HTTPS access works to three servers (172.16.50.1, .2, .4) but NOT to 172.16.50.3. Which problem type is the cause?", "correct_answer": "C", "explanation": "Since three out of four servers in the same farm are reachable via HTTPS (TCP port 443) but one specific server (.3) is not, the issue is isolated to that single host. This rules out network-wide problems like NAT or proxy misconfiguration. A VPN issue would affect all or none. A blocked transport port (port 443 being blocked by a host-based firewall or ACL on .3 specifically) is the most logical explanation for why only that one server is unreachable while the others are fine. NAT and proxy issues would typically affect all servers behind the same address, not just one.", "generated_by": "claude-sonnet", "llm_judge_score": 4}

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