100-150 Question 95
Select 3A network administrator is troubleshooting an issue where a VoIP phone connected to the network is experiencing poor call quality. The administrator suspects that endpoint configuration and media type compatibility might be the cause. Which of the following factors should the administrator verify to resolve the issue?
- A
The codec used by the VoIP phone is supported by the network.
- B
The VoIP phone is configured with the correct VLAN for voice traffic.
- C
The IP address of the VoIP phone is reserved in the DHCP server.
- D
The endpoint supports full-duplex communication.
- E
The VoIP phone has sufficient storage capacity for call recordings.
Show answer and explanation
Correct answers: A, B, D
Explanation
To troubleshoot poor call quality in a VoIP phone, the administrator should focus on factors that directly impact voice traffic and media compatibility. Ensuring codec compatibility, VLAN configuration for voice traffic, and full-duplex communication are key steps in addressing the issue. Other factors, such as DHCP reservations or storage capacity, do not directly contribute to real-time call quality.
- A. Correct.
The codec compatibility is critical for VoIP communication as incompatible codecs can cause poor call quality or failed connections.
- B. Correct.
VoIP phones often require specific VLANs for voice traffic to ensure proper quality of service (QoS) and reduce latency.
- C. Incorrect.
While a reserved IP address can be helpful for management, it does not directly impact call quality or media type compatibility.
- D. Correct.
Full-duplex communication ensures that both parties can speak and listen simultaneously, which is essential for clear and uninterrupted VoIP communication.
- E. Incorrect.
Storage capacity for call recordings is unrelated to the real-time communication issues like poor call quality.