300-445 Question 130
Select 3An enterprise network team is troubleshooting poor voice quality issues in their VoIP infrastructure. After analyzing network traffic, they notice high jitter and packet loss between branch offices. Which of the following measures would most effectively address these issues and improve voice quality?
- A
Implement Quality of Service (QoS) to prioritize voice traffic
- B
Increase the bandwidth of the WAN link between branch offices
- C
Enable traffic shaping to limit non-voice traffic during peak hours
- D
Activate redundancy protocols to reroute voice traffic during link failures
- E
Switch from the current G.711 codec to G.729 to reduce bandwidth consumption
Show answer and explanation
Correct answers: A, B, C
Explanation
High jitter and packet loss affect voice quality in VoIP environments. Measures like implementing QoS, increasing bandwidth, and shaping traffic directly target these issues by prioritizing and optimizing the flow of voice packets. Redundancy protocols and codec changes, while helpful in specific scenarios, do not directly mitigate jitter or packet loss in this case.
- A. Correct.
Implementing Quality of Service (QoS) ensures that voice traffic is prioritized over non-voice traffic, reducing jitter and packet loss, which directly improves voice quality.
- B. Correct.
Increasing the WAN bandwidth can alleviate congestion, reducing packet loss and jitter, which are critical for maintaining high-quality voice communication.
- C. Correct.
Traffic shaping limits non-essential traffic during peak times, ensuring that bandwidth is available for voice traffic, thereby improving voice quality during congestion periods.
- D. Incorrect.
While redundancy protocols are important for reliability, they do not directly address jitter or packet loss under normal traffic conditions.
- E. Incorrect.
Switching to a G.729 codec reduces bandwidth usage but might slightly degrade voice quality due to compression. It does not directly address jitter or packet loss.