Topic 1 Question 135
Two Amazon EC2 instances in different subnets should be able to connect to each other but cannot. It has been confirmed that other hosts in the same subnets are able to communicate successfully, and that security groups have valid ALLOW rules in place to permit this traffic.
Which of the following troubleshooting steps should be performed?
Check inbound and outbound security groups, looking for DENY rules
Check inbound and outbound Network ACL rules, looking for DENY rules
Review the rejected packet reason codes in the VPC Flow Logs
Use AWS X-Ray to trace the end-to-end application flow
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- 正解だと思う選択肢: B
For C - While VPC Flow Logs can provide insights into why packets are being rejected, this is a more detailed troubleshooting step. Checking the NACL rules is a more direct approach to identifying potential network layer issues.
👍 4DeadDropLabs2024/06/06 B - SG dont have deny rules
👍 3Certified1012024/05/19- 👍 2Zek2024/05/13
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