- A
The outbound rule should allow HTTPS (port 443) for response traffic.
Why wrong: This is incorrect because the response traffic from the instance uses source port 443, not destination port 443. The outbound rule should allow source port 443, not destination port 443.
- B
Network ACLs are stateless and require an explicit outbound rule for the response traffic.
This is correct. Network ACLs are stateless, so they require explicit rules for both inbound and outbound traffic. The current configuration lacks an outbound rule that allows the response traffic (source port 443) for HTTPS.
- C
The inbound rule for HTTPS (port 443) is missing from the network ACL.
Why wrong: This is incorrect because the inbound rule for HTTPS (port 443) is presumably already present; the issue lies with the outbound rule.
- D
The inbound rule for HTTP (port 80) is not needed for HTTPS traffic.
Why wrong: This is incorrect because the inbound rule for HTTP (port 80) is irrelevant to HTTPS traffic and is not the cause of the insufficiency.
SOA-C02 Stateless Network ACL Practice Question
This SOA-C02 practice question tests your understanding of networking and content delivery. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. A key principle to apply: stateless Network ACL. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Refer to the exhibit. A SysOps Administrator is reviewing the network ACL configuration. An instance in subnet 10.0.1.0/24 needs to receive HTTPS traffic from the internet. Why is the current configuration insufficient?
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
Network ACLs are stateless and require an explicit outbound rule for the response traffic.
The current configuration is insufficient because network ACLs are stateless, so they do not automatically allow response traffic. For incoming HTTPS traffic (port 443) from the internet, the inbound rule must allow destination port 443. The response traffic from the instance will have source port 443 and destination ephemeral ports. The outbound rule must explicitly allow traffic with source port 443 to any destination. Simply allowing ephemeral ports as destination is not sufficient, as the response uses source port 443. Option A is incorrect because the outbound rule should allow source port 443, not destination port 443. Option B correctly identifies that a stateless network ACL requires an explicit outbound rule for the response traffic. Options C and D are incorrect because the inbound rule for HTTPS is assumed to be present and HTTP is not relevant.
Key principle: Stateless Network ACL
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 outbound rule should allow HTTPS (port 443) for response traffic.
Why it's wrong here
This is incorrect because the response traffic from the instance uses source port 443, not destination port 443. The outbound rule should allow source port 443, not destination port 443.
- ✓
Network ACLs are stateless and require an explicit outbound rule for the response traffic.
- ✗
The inbound rule for HTTPS (port 443) is missing from the network ACL.
Why it's wrong here
This is incorrect because the inbound rule for HTTPS (port 443) is presumably already present; the issue lies with the outbound rule.
- ✗
The inbound rule for HTTP (port 80) is not needed for HTTPS traffic.
Why it's wrong here
This is incorrect because the inbound rule for HTTP (port 80) is irrelevant to HTTPS traffic and is not the cause of the insufficiency.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Stateless Network ACL
- HTTPS Response Traffic
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Stateless Network ACL
Real-world example
How this comes up in practice
A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
Visual reference
What to study next
Got this wrong? Here's your next step.
Review stateless Network ACL, then practise related SOA-C02 questions on the same topic to reinforce the concept.
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Networking and Content Delivery — study guide chapter
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FAQ
Questions learners often ask
What does this SOA-C02 question test?
Networking and Content Delivery — This question tests Networking and Content Delivery — Stateless Network ACL.
What is the correct answer to this question?
The correct answer is: Network ACLs are stateless and require an explicit outbound rule for the response traffic. — The current configuration is insufficient because network ACLs are stateless, so they do not automatically allow response traffic. For incoming HTTPS traffic (port 443) from the internet, the inbound rule must allow destination port 443. The response traffic from the instance will have source port 443 and destination ephemeral ports. The outbound rule must explicitly allow traffic with source port 443 to any destination. Simply allowing ephemeral ports as destination is not sufficient, as the response uses source port 443. Option A is incorrect because the outbound rule should allow source port 443, not destination port 443. Option B correctly identifies that a stateless network ACL requires an explicit outbound rule for the response traffic. Options C and D are incorrect because the inbound rule for HTTPS is assumed to be present and HTTP is not relevant.
What should I do if I get this SOA-C02 question wrong?
Review stateless Network ACL, then practise related SOA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Stateless Network ACL
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Last reviewed: Jun 20, 2026
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