300-445 Question 129
Select 3An enterprise network has recently deployed a unified communications (UC) solution for voice traffic. Users are reporting intermittent voice quality issues such as jitter and packet loss. As a network engineer, what would be the most appropriate steps to ensure voice traffic is prioritized and the quality is improved?
- A
Implement Quality of Service (QoS) policies to prioritize voice traffic over other traffic types.
- B
Enable Power-over-Ethernet (PoE) on all switches in the network.
- C
Configure separate VLANs for voice and data traffic to isolate voice traffic.
- D
Monitor and analyze traffic patterns using NetFlow or similar tools to identify network bottlenecks.
- E
Increase the bandwidth of the WAN link to accommodate additional traffic.
Show answer and explanation
Correct answers: A, C, D
Explanation
Voice traffic is highly sensitive to issues like jitter, latency, and packet loss. To ensure high-quality voice communication, it is crucial to prioritize voice traffic using QoS, isolate it from other traffic with VLANs, and monitor network performance to pinpoint potential bottlenecks. Enabling PoE or simply increasing bandwidth does not directly address the root causes of voice quality issues, which are typically related to prioritization and network design.
- A. Correct.
Implementing QoS policies ensures that voice traffic is prioritized over less time-sensitive traffic, helping to reduce jitter and packet loss.
- B. Incorrect.
Enabling PoE on switches is unrelated to addressing voice quality issues, as it primarily provides power for devices such as IP phones.
- C. Correct.
Separating voice and data traffic into different VLANs reduces collisions and interference, improving voice quality.
- D. Correct.
Monitoring traffic with tools like NetFlow helps identify bottlenecks and enables informed troubleshooting and optimization for voice traffic.
- E. Incorrect.
Increasing bandwidth may help with overall traffic congestion but does not specifically address prioritization or voice traffic quality.