ANS-C01 Network Management and Operations Practice Question
This ANS-C01 practice question tests your understanding of network management and operations. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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.
A network engineer is diagnosing a connectivity issue between an on-premises network and an Amazon VPC connected via a site-to-site VPN. The VPN tunnel is up, but traffic is not reaching the VPC. Which TWO actions should the engineer take to troubleshoot the issue? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review the security group rules associated with the VPC resources to ensure they allow traffic from the on-premises network
Option A is correct because incorrect route propagation can prevent the VPC from knowing the on-premises network. Option D is correct because security group rules might block inbound traffic from the VPN. Option B is wrong because the VPN tunnel is up. Option C is wrong because the customer gateway is the on-premises endpoint, not the VPC. Option E is wrong because the issue is about routing, not NAT.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Review the security group rules associated with the VPC resources to ensure they allow traffic from the on-premises network
Why this is correct
Security groups act as a firewall for the instances.
Related concept
Static NAT maps one inside address to one outside address.
✗
Confirm the customer gateway is associated with the correct VPC
Why it's wrong here
Customer gateway is associated with the VPN connection, not the VPC directly.
✓
Verify that the VPC route tables include routes for the on-premises network pointing to the virtual private gateway
Why this is correct
Without proper routes, traffic cannot be forwarded to the VPC.
Related concept
Static NAT maps one inside address to one outside address.
✗
Verify that the on-premises network has a NAT device configured
Why it's wrong here
NAT is not required for site-to-site VPN connectivity.
✗
Check that the VPN tunnel's status is 'UP'
Why it's wrong here
The tunnel is already up.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
Network Management and Operations — This question tests Network Management and Operations — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Review the security group rules associated with the VPC resources to ensure they allow traffic from the on-premises network — Option A is correct because incorrect route propagation can prevent the VPC from knowing the on-premises network. Option D is correct because security group rules might block inbound traffic from the VPN. Option B is wrong because the VPN tunnel is up. Option C is wrong because the customer gateway is the on-premises endpoint, not the VPC. Option E is wrong because the issue is about routing, not NAT.
What should I do if I get this ANS-C01 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related ANS-C01 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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