300-445 Question 183
Select 4An enterprise network is experiencing intermittent packet loss and high latency for critical applications hosted in a data center. Upon reviewing the network monitoring system, the following observations are made:
- Packet loss is observed at specific times during high traffic periods.
- Network interface utilization is consistently above 90% on certain devices.
- Jitter is impacting real-time voice and video traffic.
Which of the following would be the most effective steps to diagnose and address the issue?
- A
Analyze NetFlow data to identify the sources of high traffic and bandwidth usage.
- B
Inspect the routing table on affected devices to verify routing loops or suboptimal paths.
- C
Perform a packet capture to analyze real-time traffic patterns and identify anomalies.
- D
Increase the bandwidth allocation on the affected interfaces to handle higher traffic loads.
- E
Monitor QoS policies to ensure voice and video traffic are prioritized during congestion.
Show answer and explanation
Correct answers: A, B, C, E
Explanation
Diagnosing and addressing packet loss, congestion, and jitter requires a systematic approach involving traffic analysis, inspection of routing configurations, and verification of QoS policies. Analyzing NetFlow data, inspecting routing tables, and performing packet captures are essential diagnostic steps. Monitoring QoS ensures that real-time traffic is protected during congestion. Increasing bandwidth, while beneficial in some cases, does not resolve underlying issues and is not part of the diagnostic process.
- A. Correct.
Analyzing NetFlow data helps identify which applications or hosts are generating high traffic, which can pinpoint the sources of congestion and packet loss.
- B. Correct.
Inspecting the routing table is critical to ensure there are no misconfigurations, loops, or suboptimal paths that could be contributing to high latency or loss.
- C. Correct.
Performing a packet capture allows for detailed inspection of traffic anomalies, such as retransmissions or excessive jitter in real-time traffic.
- D. Incorrect.
Increasing the bandwidth allocation may temporarily mitigate congestion, but it does not address the root cause of the issue or diagnose the problem.
- E. Correct.
Monitoring QoS policies ensures that critical traffic like voice and video has the necessary prioritization to minimize the impact of jitter and congestion.