300-445 Question 178
Select 3You are a network administrator for an enterprise organization. Users in a specific branch office report intermittent connectivity issues when accessing a cloud-hosted application. After examining the network telemetry data, you observe the following: consistent packet loss of 5-7% on the branch office's connection to the data center, high jitter values during peak hours, and no recent changes in routing. Which of the following actions should you prioritize to diagnose the root cause of the issue?
- A
Check the utilization of the WAN link between the branch office and the data center during peak hours.
- B
Perform a traceroute from the branch office to the cloud application to identify any intermediate hop issues.
- C
Analyze QoS (Quality of Service) policies applied on the WAN link to confirm prioritization of critical traffic.
- D
Perform a packet capture at the branch office to inspect application-layer traffic for potential issues.
- E
Reconfigure the routing protocol to reduce convergence time and avoid potential delays.
Show answer and explanation
Correct answers: A, B, C
Explanation
The reported symptoms (packet loss, jitter during peak hours) point to potential congestion or misconfiguration in the network. Checking WAN link utilization, running a traceroute, and verifying QoS policies are the most relevant actions to diagnose the root cause. Packet capture and routing reconfiguration, while valid troubleshooting steps in other scenarios, are not directly applicable to the current problem.
- A. Correct.
High utilization on the WAN link could cause congestion, leading to packet loss and jitter. This is a critical step to investigate the issue.
- B. Correct.
Traceroute can help identify if there are any intermediate network devices or hops causing delay or packet drops.
- C. Correct.
QoS policies might not be prioritizing the critical application traffic properly, contributing to the packet loss and jitter. Verifying QoS is essential in diagnosing the issue.
- D. Incorrect.
While a packet capture can provide insight into application-layer issues, the problem described (packet loss and jitter) is more likely related to network-layer congestion or configuration, making this less of a priority.
- E. Incorrect.
There is no indication of a routing issue in the scenario. Reconfiguring the routing protocol is unnecessary and unrelated to the reported symptoms.