Question 1,008 of 1,621
ANS-C01 Network Implementation Practice Question
A network engineer is configuring an AWS Transit Gateway to connect multiple VPCs and an on-premises network via Direct Connect. The on-premises network advertises a prefix 10.0.0.0/8. One of the VPCs has a CIDR of 10.0.0.0/16. What will happen to traffic destined to 10.0.0.5 from another VPC attached to the Transit Gateway?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Traffic is routed to the VPC because of a more specific route
AWS Transit Gateway uses longest prefix match routing. The VPC's CIDR 10.0.0.0/16 is more specific than the on-premises prefix 10.0.0.0/8, so traffic destined to 10.0.0.5 will be routed to the VPC. Option B is incorrect; routes conflict only if they have the same prefix length, but here different lengths allow the longest prefix to win. Option C is incorrect because the on-premises route is less specific and will not be used. Option D is incorrect because there is no load-balancing; the more specific route takes precedence.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Traffic is routed to the VPC because of a more specific route
Why this is correct
Correct; Transit Gateway uses longest prefix match, and /16 is more specific than /8.
- ✗
Traffic is dropped due to conflicting routes
Why it's wrong here
Incorrect; Transit Gateway does not drop traffic; it uses the most specific route.
- ✗
Traffic is routed to the on-premises network because it is learned via Direct Connect
Why it's wrong here
Incorrect; the VPC route is more specific and will be preferred.
- ✗
Traffic is load-balanced between the VPC and on-premises
Why it's wrong here
Incorrect; load-balancing does not occur; longest prefix match is used.
Visual reference
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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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