ANS-C01 Network Design Practice Question
Which TWO statements about AWS Transit Gateway are correct? (Choose two.)
⚠ Common exam trap
The ANS-C01 exam often tests the misconception that Transit Gateway provides internet access or replaces Direct Connect, but in reality, TGW is a hub for private routing and requires separate components (IGW, NAT, Direct Connect) for internet or dedicated on-premises connectivity.
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
✓
It supports transitive routing between attached VPCs
AWS Transit Gateway (TGW) acts as a central hub that enables transitive routing between all attached VPCs. When you attach multiple VPCs to the same TGW, their route tables are configured to point to the TGW, allowing traffic to flow from one VPC to another through the hub without needing individual VPC peering connections. This transitive behavior is a core feature of TGW, simplifying network architecture and reducing the number of routing paths required.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It provides internet access for attached VPCs
Why it's wrong here
Transit Gateway does not provide internet access; an Internet Gateway is needed.
- ✓
It supports transitive routing between attached VPCs
Why this is correct
Transit Gateway allows VPCs to communicate through it.
- ✓
It can be shared across AWS accounts using AWS Resource Access Manager
Why this is correct
RAM allows sharing Transit Gateway with other accounts.
- ✗
It can replace AWS Direct Connect for on-premises connectivity
Why it's wrong here
Transit Gateway itself is not a connection; it is a hub that requires underlying connections.
- ✗
It only supports VPN attachments
Why it's wrong here
It supports both VPN and Direct Connect attachments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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