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SCS-C02 · Question #326

You have an Ec2 Instance in a private subnet which needs to access the KMS service. Which of the following methods can help fulfil this requirement, keeping security in perspective

The correct answer is A. Use a VPC endpoint. The AWS Documentation mentions the following You can connect directly to AWS KMS through a private endpoint in your VPC instead of connecting over the internet. When you use a VPC endpoint communication between your VPC and AWS KMS is conducted entirely within the AWS Option B…

Submitted by femi9· Mar 6, 2026Infrastructure Security

Question

You have an Ec2 Instance in a private subnet which needs to access the KMS service. Which of the following methods can help fulfil this requirement, keeping security in perspective

Options

  • AUse a VPC endpoint
  • BAttach an Internet gateway to the subnet
  • CAttach a VPN connection to the VPC
  • DUse VPC Peering

How the community answered

(14 responses)
  • A
    86% (12)
  • B
    7% (1)
  • C
    7% (1)

Explanation

The AWS Documentation mentions the following You can connect directly to AWS KMS through a private endpoint in your VPC instead of connecting over the internet. When you use a VPC endpoint communication between your VPC and AWS KMS is conducted entirely within the AWS Option B is invalid because this could open threats from the internet Option C is invalid because this is normally used for communication between on-premise environments and AWS. Option D is invalid because this is normally used for communication between VPCs https://docs.aws.amazon.com/kms/ latest/developerguide/kms-vpc-endpoint.html

Topics

#VPC endpoint#KMS#private subnet#network isolation

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