1Z0-1072-25 Question 165
Single answerYou are troubleshooting a connectivity issue between two subnets in separate VCNs using Network Visualizer in Oracle Cloud Infrastructure. However, when you open Network Visualizer, no traffic information appears for the hosts you are investigating. Which action must you perform first to ensure you can see the relevant flow data in Network Visualizer?
- A
Enable VCN Flow Logs for the relevant subnets in the compartments you want to monitor.
- B
Create an additional custom route table in each VCN and specify the subnets as route destinations.
- C
Update your default security list to allow all inbound and outbound IP protocols.
- D
Add an Internet Gateway to each VCN to permit external traffic flow visibility.
Show answer and explanation
Correct answer: A
Explanation
Network Visualizer in Oracle Cloud Infrastructure uses flow logs to collect and display traffic information. Before you can visualize packet paths across subnets, flow logs must be enabled on the VCN or subnets relevant to the traffic flow in question. Refer to Oracle� Network Visualizer documentation in the OCI console for detailed steps on enabling and using VCN Flow Logs to troubleshoot network connectivity.
- A. Correct.
Correct. Network Visualizer relies on VCN Flow Logs to display traffic flow details. Without enabling flow logs, the tool has no data to display. Configuring flow logs at the subnet level ensures traffic information is collected and visible in Network Visualizer.
- B. Incorrect.
Incorrect. Although route tables are essential for directing traffic, simply creating an additional route table does not provide detailed traffic flow data to Network Visualizer. Flow logs must still be enabled to visualize traffic paths.
- C. Incorrect.
Incorrect. Adjusting security lists might facilitate or block traffic, but it does not provide the traffic telemetry needed by Network Visualizer. Even if all traffic is allowed, without flow logs enabled, Network Visualizer will not display flow data.
- D. Incorrect.
Incorrect. An Internet Gateway is useful for public traffic, but it is not needed for Network Visualizer to display flow information. Flow logs are required to monitor traffic, regardless of whether traffic is routed to the public internet or remains private.