How to Interpret VPC Flow Logs to Identify Blocked Outbound HTTP Traffic
This DOP-C02 practice question tests your understanding of monitoring and logging. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Outbound HTTP traffic to the internet is blocked.
The VPC Flow Logs show that outbound traffic from the internal network to the internet on port 80 (HTTP) is being explicitly rejected (REJECT). This indicates that outbound HTTP traffic is blocked, while other traffic (such as HTTPS on port 443) may be accepted or handled differently. The logs do not show any accepted traffic on port 80, confirming the block.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Internal traffic on port 80 is allowed.
Why it's wrong here
No internal port 80 traffic shown; internal is port 443.
✓
Outbound HTTP traffic to the internet is blocked.
Why this is correct
Correct; third record shows REJECT for port 80 outbound to external IP.
Related concept
Read the scenario before looking for a memorised answer.
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume all outbound traffic is allowed by default in a VPC, but VPC Flow Logs can reveal explicit deny rules in network ACLs or security groups that block specific ports like HTTP while allowing others like HTTPS.
Trap categories for this question
Command / output trap
No internal port 80 traffic shown; internal is port 443.
Detailed technical explanation
How to think about this question
VPC Flow Logs capture metadata about network traffic, including the action (ACCEPT or REJECT) based on security group and network ACL rules. A REJECT action means the packet was dropped by a network ACL (which returns an ICMP unreachable for TCP) or by a security group (which silently drops). In this scenario, the REJECT on outbound port 80 suggests a network ACL rule is explicitly denying HTTP egress, while HTTPS (port 443) may be allowed by a higher-priority rule.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
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
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Monitoring and Logging — This question tests Monitoring and Logging — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Outbound HTTP traffic to the internet is blocked. — The VPC Flow Logs show that outbound traffic from the internal network to the internet on port 80 (HTTP) is being explicitly rejected (REJECT). This indicates that outbound HTTP traffic is blocked, while other traffic (such as HTTPS on port 443) may be accepted or handled differently. The logs do not show any accepted traffic on port 80, confirming the block.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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