How many AWS Internet gateways can you define in AWS?

Question

Options

• ATwo per VPC
• BUnlimited
• COne per VPC
• DOne per Region

• A
  2% (1)
• B
  5% (2)
• C
  90% (38)
• D
  2% (1)

Explanation

An Internet Gateway (IGW) is a VPC-level resource, and AWS enforces a strict one-to-one relationship between an IGW and a VPC - you can attach at most one IGW to a VPC at any time, making C correct.

Why the distractors are wrong:

• A (Two per VPC): There is no two-IGW configuration; a second attached gateway would create routing ambiguity that AWS simply doesn't allow.
• B (Unlimited): While you can create multiple IGWs in your account, each one can only be attached to a single VPC simultaneously - the attachment constraint is what matters on the exam.
• D (One per Region): IGWs are scoped to VPCs, not regions. A region can contain many VPCs, each with its own IGW.

Memory tip: Think "1 VPC = 1 front door." Just like a house has one main entrance to the internet, each VPC gets exactly one Internet Gateway. If you need more capacity, you scale resources inside the VPC, not the gateway itself.

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