300-445 Question 177
Select 2A network team receives complaints about poor application performance from users in a remote branch office. Upon investigation, they notice that VoIP calls are experiencing jitter and frequent drops. Using network assurance tools, the team collects telemetry data and observes the following: consistent packet loss on a specific link, high interface utilization on a core router, and OSPF neighbor flapping between two routers. Which of the following issues should the team prioritize to resolve the VoIP problems?
- A
Investigate and resolve the packet loss on the specific link.
- B
Analyze and mitigate high interface utilization on the core router.
- C
Adjust OSPF timers to prevent neighbor flapping.
- D
Upgrade the VoIP application to handle jitter more effectively.
Show answer and explanation
Correct answers: A, B
Explanation
VoIP performance issues such as jitter and call drops are often caused by packet loss and network congestion. Addressing the packet loss on the specific link and analyzing the high interface utilization on the core router are critical steps to improving VoIP quality. While OSPF neighbor flapping and application upgrades may be relevant in other contexts, they are not the primary causes of the issue in this scenario.
- A. Correct.
Packet loss is a critical factor affecting VoIP quality, as missing packets can lead to voice distortions, drops, or jitter. Resolving this issue is essential for improving VoIP performance.
- B. Correct.
High interface utilization on the core router can cause congestion, leading to jitter and packet delays in VoIP traffic. Addressing this issue can significantly improve application performance.
- C. Incorrect.
While OSPF neighbor flapping can indicate network instability, it is not directly related to the jitter and poor VoIP performance observed in this scenario. It is a lower priority for resolving the immediate issue.
- D. Incorrect.
Upgrading the VoIP application might improve its handling of jitter, but this is not a network-level solution. The root cause lies in the network conditions, such as packet loss and congestion, rather than the application itself.