This ANS-C01 practice question tests your understanding of network management and operations. 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.
A network engineer needs to verify the routing path between two EC2 instances in different subnets within the same VPC. Which AWS tool can provide this information?
Amazon CloudWatch Logs
Why wrong: CloudWatch Logs stores logs, not path analysis.
VPC Reachability Analyzer
Reachability Analyzer tests connectivity and shows the routing path.
AWS Config
Why wrong: AWS Config records configuration changes, not real-time path analysis.
Run traceroute from one instance to the other
Why wrong: Traceroute requires SSH access and may not work if security groups block ICMP.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
VPC Reachability Analyzer
Option B is correct because VPC Reachability Analyzer can test connectivity and provide routing path information. Option A is incorrect because traceroute from an instance requires SSH access. Option C is incorrect because AWS Config provides configuration history, not real-time path analysis. Option D is incorrect because CloudWatch does not provide path analysis.
Key principle: Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon CloudWatch Logs
Why it's wrong here
CloudWatch Logs stores logs, not path analysis.
VPC Reachability Analyzer
Why this is correct
Reachability Analyzer tests connectivity and shows the routing path.
Related concept
CIDR notation defines the prefix length.
AWS Config
Why it's wrong here
AWS Config records configuration changes, not real-time path analysis.
Run traceroute from one instance to the other
Common exam traps
Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.
Detailed technical explanation
Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.
Key takeaway
Count usable hosts — not total addresses — and remember that the network and broadcast addresses are not available to hosts in standard IPv4 subnets.
Real-world example
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
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related ANS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
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FAQ
Network Management and Operations — This question tests Network Management and Operations — CIDR notation defines the prefix length..
The correct answer is: VPC Reachability Analyzer — Option B is correct because VPC Reachability Analyzer can test connectivity and provide routing path information. Option A is incorrect because traceroute from an instance requires SSH access. Option C is incorrect because AWS Config provides configuration history, not real-time path analysis. Option D is incorrect because CloudWatch does not provide path analysis.
Review block sizes, usable host formulas (2^n − 2), and how to find network and broadcast addresses for /24 through /30. Then practise related ANS-C01 subnetting questions on CIDR, address ranges, and subnet selection.
CIDR notation defines the prefix length.
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Last reviewed: Jun 20, 2026
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.
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