300-710 Question #253: Real Exam Question with Answer & Explanation

Question

An administrator is adding a QoS policy to a Cisco FTD deployment. When a new rule is added to the policy and QoS is applied on 'Interfaces in Destination Interface Objects", no interface objects are available What is the problem?

Options

• AThe FTD is out of available resources lor use. so QoS cannot be added
• BThe network segments that the interfaces are on do not have contiguous IP space
• CQoS is available only on routed interfaces, and this device is in transparent mode.
• DA conflict exists between the destination interface types that is preventing QoS from being added

Explanation

{"question_number": 3, "correct_answer": "C", "explanation": "Cisco FTD Quality of Service (QoS) is only supported on routed-mode interfaces. When the FTD device is deployed in transparent (bridge) mode, it operates at Layer 2 and does not have routed interfaces. Because no routed interfaces exist, the FMC has no valid interface objects to present when configuring QoS rules with 'Interfaces in Destination Interface Objects,' resulting in an empty list. The solution is to either switch the device to routed mode or accept that QoS is not supported in transparent mode. The other options describe unrelated issues (resource limits, non-contiguous IP space, interface type conflicts) that would not cause this specific behavior.", "generated_by": "claude-sonnet", "llm_judge_score": 3}

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