300-410 Question 279
Single answerA network administrator is troubleshooting performance issues on a VoIP network. Users report poor call quality with symptoms of high jitter and delay. The administrator configures an IP SLA operation to measure jitter, delay, and packet loss between two devices. However, after reviewing the IP SLA results, the administrator notices consistent high jitter values but normal delay and packet loss values. What is the MOST LIKELY next step the administrator should take to resolve the issue?
- A
Verify the QoS configuration on network devices to ensure proper prioritization of VoIP traffic.
- B
Increase the bandwidth limit on links experiencing high utilization.
- C
Reconfigure the IP SLA operation to measure only packet loss.
- D
Enable ICMP-based IP SLA operations to confirm connectivity between the devices.
Show answer and explanation
Correct answer: A
Explanation
The scenario involves troubleshooting jitter, a common issue in VoIP networks caused by inconsistent packet delivery. Since delay and packet loss are normal, the issue is likely due to improper QoS configuration, which can result in VoIP traffic not being prioritized correctly. Verifying and correcting QoS settings ensures VoIP packets are given the appropriate priority, reducing jitter and improving call quality.
- A. Correct.
This is the correct answer. High jitter is often caused by inconsistent packet delivery, which can occur when VoIP traffic is not properly prioritized. Verifying and correcting QoS settings can help mitigate jitter and improve call quality.
- B. Incorrect.
While increasing bandwidth might seem like a solution, this is not directly related to the jitter issue if delay and packet loss are normal. Jitter is more likely caused by improper traffic handling rather than insufficient bandwidth.
- C. Incorrect.
Reconfiguring the IP SLA operation to measure only packet loss is unnecessary since packet loss is already reported as normal. This action would not address the jitter issue.
- D. Incorrect.
Enabling ICMP-based IP SLA operations would only test basic connectivity and would not provide meaningful insights into jitter or delay issues affecting VoIP traffic.