ANS-C01 Network Implementation Practice Question
A company wants to provide internet access to instances in a public subnet. Which component must be attached to the VPC and have a route to it in the subnet's route table?
⚠ Common exam trap
It's easy for candidates to confuse the NAT Gateway (which provides outbound-only internet access for private subnets) with the Internet Gateway (which provides bidirectional internet access for public subnets), leading them to select Option C for a public subnet scenario.
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
✓
Internet Gateway
An Internet Gateway (IGW) is a horizontally scaled, redundant component that allows communication between a VPC and the internet. For instances in a public subnet to have outbound internet access and be reachable from the internet, the IGW must be attached to the VPC, and the subnet's route table must include a default route (0.0.0.0/0) pointing to the IGW as the target.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Transit Gateway
Why it's wrong here
Transit Gateway is for connecting multiple networks.
- ✗
Virtual Private Gateway
Why it's wrong here
Virtual Private Gateway is for VPN connections.
- ✗
NAT Gateway
Why it's wrong here
NAT Gateway is for private subnets.
- ✓
Internet Gateway
Why this is correct
Internet Gateway enables internet access for public subnets.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.