350-401 Question 620
Select 3A network administrator has configured IP SLA on a router to monitor VoIP traffic performance between two sites. The administrator notices significant jitter and delay impacting call quality. Which of the following actions should the administrator take to identify and resolve the issue?
- A
Verify the IP SLA configuration to ensure the correct source and destination IP addresses are used.
- B
Check if the interface queues are properly prioritized for voice traffic using QoS techniques.
- C
Increase the IP SLA polling frequency to every 1 second to capture more granular data.
- D
Inspect the routing table to ensure no suboptimal routing paths exist between the sites.
- E
Disable IP SLA and use ping tests instead to monitor connectivity.
Show answer and explanation
Correct answers: A, B, D
Explanation
To troubleshoot network performance issues using IP SLA, it is crucial to verify the configuration, ensure Quality of Service (QoS) is applied to prioritize voice traffic, and confirm there are no suboptimal routing paths causing delays. Disabling IP SLA or increasing its polling frequency excessively would not resolve the underlying problem effectively.
- A. Correct.
Correct, as incorrect source or destination IP addresses in the IP SLA configuration can lead to inaccurate measurements or monitoring of the wrong traffic.
- B. Correct.
Correct, as improper QoS configuration can cause voice traffic to experience jitter and delay due to lack of prioritization.
- C. Incorrect.
Incorrect, as increasing the polling frequency excessively can lead to significant CPU overhead on the router without necessarily resolving the issue.
- D. Correct.
Correct, as suboptimal routing paths can lead to increased delay and jitter, which impacts voice quality.
- E. Incorrect.
Incorrect, as disabling IP SLA would remove a valuable tool for monitoring performance metrics like jitter and delay.