PAS-C01 Technology Practice Question
An SAP system administrator is troubleshooting an issue where an application cannot connect to an SAP HANA database running on an EC2 instance. The security group for the HANA instance allows inbound traffic on port 39013 (SQL) from the application server's security group. The network ACLs for the subnet allow all traffic. What could be the cause of the connectivity issue?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The network ACL for the HANA instance's subnet is missing an outbound rule to allow return traffic on ephemeral ports.
The network ACL is stateless and must allow both inbound and outbound traffic; the outbound rule for ephemeral ports may be missing. Option A is incorrect because the security group allows the port. Option B is incorrect because the NACL allows all inbound traffic. Option D is incorrect because the security group allows the application server's security group.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The security group for the HANA instance does not allow inbound traffic on port 39013 from the application server's IP address.
Why it's wrong here
A is wrong: the security group allows from the application server's security group.
- ✗
The network ACL for the application server's subnet does not allow outbound traffic on port 39013.
Why it's wrong here
B is wrong: the NACL allows all traffic.
- ✓
The network ACL for the HANA instance's subnet is missing an outbound rule to allow return traffic on ephemeral ports.
Why this is correct
C is correct: NACLs are stateless; outbound rules for return traffic are required.
- ✗
The security group for the application server does not allow outbound traffic on port 39013.
Why it's wrong here
D is wrong: security groups are stateful; outbound is allowed by default.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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