The correct interpretation is that the VPC has CIDR 10.0.0.0/16, an internet gateway, and a VPC peering connection to a VPC with CIDR 192.168.0.0/16. This is correct because the route table contains a local route for 10.0.0.0/16, which defines the VPC’s own address space, a default route (0.0.0.0/0) pointing to an internet gateway (igw-xxx) for outbound internet traffic, and a specific route for 192.168.0.0/16 pointing to a VPC peering connection (pcx-xxx), which directs traffic to the peered VPC. On the AWS Certified Advanced Networking Specialty ANS-C01 exam, VPC route table interpretation tests your ability to read routing logic and identify how traffic flows between subnets, the internet, and peered VPCs. A common trap is assuming a peering route is transitive or that a default route overrides a more specific peering route—remember, the most specific route wins. Memory tip: “Local is your home, IGW is the front door, and pcx is the neighbor’s driveway.”
ANS-C01 Network Design Practice Question
This ANS-C01 practice question tests your understanding of network design. 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. 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.
Network Topology
Refer to the exhibit. A route table shows routes for a VPC. What is the correct interpretation of this route table?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The VPC has CIDR 10.0.0.0/16, an internet gateway, and a VPC peering connection to a VPC with CIDR 192.168.0.0/16
Option A is correct because the route table shows a local route for 10.0.0.0/16, which is the VPC's CIDR, a default route (0.0.0.0/0) pointing to an internet gateway (igw-xxx), and a specific route for 192.168.0.0/16 pointing to a VPC peering connection (pcx-xxx). This configuration allows traffic destined for the peered VPC's CIDR to be routed over the peering connection, while all other internet-bound traffic goes through the internet gateway.
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.
✓
The VPC has CIDR 10.0.0.0/16, an internet gateway, and a VPC peering connection to a VPC with CIDR 192.168.0.0/16
Why this is correct
Local route indicates VPC CIDR, default route to IGW, and peering route to peer CIDR.
Related concept
Read the scenario before looking for a memorised answer.
✗
The VPC has CIDR 10.0.0.0/16, a NAT gateway, and a VPN connection to 192.168.0.0/16
Common exam trap: answer the scenario, not the keyword
AWS often tests the distinction between internet gateway, NAT gateway, and virtual private gateway in route table entries, and the trap here is confusing the target of the default route (0.0.0.0/0) with the type of gateway used for internet access versus VPN or peering connections.
Detailed technical explanation
How to think about this question
VPC peering connections enable private IP routing between VPCs using the AWS global network, and route tables must have explicit routes for the peered VPC's CIDR to direct traffic over the peering connection. The local route is automatically added for the VPC's own CIDR and cannot be modified or deleted. In real-world scenarios, overlapping CIDRs between peered VPCs can cause routing conflicts, as the most specific route (longest prefix match) takes precedence, potentially breaking connectivity.
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.
Network Design — This question tests Network Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The VPC has CIDR 10.0.0.0/16, an internet gateway, and a VPC peering connection to a VPC with CIDR 192.168.0.0/16 — Option A is correct because the route table shows a local route for 10.0.0.0/16, which is the VPC's CIDR, a default route (0.0.0.0/0) pointing to an internet gateway (igw-xxx), and a specific route for 192.168.0.0/16 pointing to a VPC peering connection (pcx-xxx). This configuration allows traffic destined for the peered VPC's CIDR to be routed over the peering connection, while all other internet-bound traffic goes through the internet gateway.
What should I do if I get this ANS-C01 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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