This ANS-C01 practice question tests your understanding of network implementation. 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 company is using AWS Direct Connect to connect its on-premises network to a VPC via a private virtual interface (VIF) attached to a virtual private gateway (VGW). The company wants to add redundant connectivity using a second Direct Connect connection from a different provider. The network team proposes using a Direct Connect gateway (DXGW) with two private VIFs from different connections, each attached to the DXGW. The DXGW will be associated with the VGW. Which THREE steps are required to complete this configuration? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Associate both private virtual interfaces with the same Direct Connect gateway.
Option A is correct because both VIFs must be associated with the same DXGW. Option B is correct because the DXGW must be associated with the VGW. Option D is correct because the on-premises router must advertise the same BGP prefixes over both VIFs to enable active-active or failover. Option C is incorrect because VGWs are regional, not per-AZ. Option E is incorrect because the VPC route tables must have routes pointing to the VGW, not to the DXGW directly.
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
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Add routes to the VPC subnets' route tables pointing to the Direct Connect gateway.
Why it's wrong here
Routes point to VGW, not DXGW.
✓
Associate both private virtual interfaces with the same Direct Connect gateway.
Why this is correct
Both VIFs connect to the same DXGW for redundancy.
Create a separate virtual private gateway for each Direct Connect connection.
Why it's wrong here
Only one VGW is needed per VPC.
Common exam traps
Common exam trap: usable hosts are not the same as total addresses
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
How to think about this question
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.
KKey Concepts to Remember
CIDR notation defines the prefix length.
Block size helps identify subnet boundaries.
Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
The required host count determines the smallest suitable subnet.
TExam Day Tips
→Write the block size before choosing the subnet.
→Check whether the question asks for hosts, subnets or a specific address range.
→Do not confuse /24, /25, /26 and /27 host counts.
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
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 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.
Network Implementation — This question tests Network Implementation — CIDR notation defines the prefix length..
What is the correct answer to this question?
The correct answer is: Associate both private virtual interfaces with the same Direct Connect gateway. — Option A is correct because both VIFs must be associated with the same DXGW. Option B is correct because the DXGW must be associated with the VGW. Option D is correct because the on-premises router must advertise the same BGP prefixes over both VIFs to enable active-active or failover. Option C is incorrect because VGWs are regional, not per-AZ. Option E is incorrect because the VPC route tables must have routes pointing to the VGW, not to the DXGW directly.
What should I do if I get this ANS-C01 question wrong?
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.
What is the key concept behind this question?
CIDR notation defines the prefix length.
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Question Discussion
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