ANS-C01 Network Design Practice Question
A company is designing a multi-account AWS environment using AWS Transit Gateway. They have 10 VPCs in separate accounts that need to communicate with each other and with an on-premises network via Direct Connect. Which three components are required to enable this connectivity? (Choose three.)
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
✓
AWS Resource Access Manager to share the Transit Gateway with other accounts
Options A, B, and C are correct. AWS Transit Gateway (C) in a central network account acts as a hub for inter-VPC and on-premises connectivity. AWS Resource Access Manager (A) is required to share the Transit Gateway with other accounts so that VPCs in those accounts can attach to it. A Direct Connect Gateway (B) attached to the Transit Gateway provides connectivity to the on-premises network via Direct Connect. Option D is incorrect because VPC Peering is unnecessary when using Transit Gateway. Option E is incorrect because a Site-to-Site VPN is not required when Direct Connect is already used for on-premises connectivity.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
AWS Resource Access Manager to share the Transit Gateway with other accounts
Why this is correct
RAM allows sharing the Transit Gateway with VPCs in other accounts.
- ✓
Direct Connect Gateway attached to the Transit Gateway
Why this is correct
Direct Connect Gateway connects the Transit Gateway to the Direct Connect connection.
- ✓
AWS Transit Gateway in the network account
Why this is correct
Transit Gateway is the hub for connecting VPCs and on-premises.
- ✗
VPC Peering connections between each pair of VPCs
Why it's wrong here
Transit Gateway eliminates the need for VPC Peering.
- ✗
AWS Site-to-Site VPN connection from the Transit Gateway to the on-premises network
Why it's wrong here
Direct Connect is used instead of VPN.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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