300-445 Question 132
Select 3An enterprise network is experiencing intermittent voice call quality issues, such as choppiness and delays, during peak business hours. The network team is tasked with identifying the root cause and implementing a solution. Which of the following actions should be prioritized to ensure reliable voice communication in the network?
- A
Implement Quality of Service (QoS) policies to prioritize voice traffic over other types of traffic.
- B
Increase the bandwidth of the network by upgrading WAN links.
- C
Configure jitter buffers on voice endpoints to mitigate variations in packet arrival times.
- D
Enable Spanning Tree Protocol (STP) on all switches to prevent network loops.
- E
Perform a packet capture to analyze the behavior of voice traffic during peak hours.
Show answer and explanation
Correct answers: A, C, E
Explanation
To ensure reliable voice communication, the network team should prioritize actions that directly address the unique requirements of voice traffic, such as low latency, minimal jitter, and packet loss. Implementing QoS policies ensures traffic prioritization, configuring jitter buffers mitigates timing issues, and packet capture helps identify underlying problems. While increasing bandwidth and enabling STP may be beneficial in other contexts, they do not specifically resolve voice-related issues in this scenario.
- A. Correct.
Quality of Service (QoS) policies are essential for prioritizing voice traffic, which is sensitive to delays and packet loss, over less critical traffic such as file transfers.
- B. Incorrect.
Increasing bandwidth may help alleviate congestion, but it is not a targeted solution specifically for improving voice traffic performance. QoS and other optimizations should be implemented first.
- C. Correct.
Jitter buffers help smooth out variations in packet arrival times, which is critical for maintaining consistent voice quality.
- D. Incorrect.
Enabling Spanning Tree Protocol (STP) helps prevent network loops but does not directly address voice traffic issues or improve call quality.
- E. Correct.
Performing a packet capture can provide insight into the specific issues affecting voice traffic, such as latency, jitter, or packet loss, and is a crucial diagnostic step.