What is the SMALLEST CIDR block that meets these requirements?

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In: SAA-C03
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A development team has launched a new application that is hosted on Amazon EC2 instances inside a development VPC.A solutions architect needs to create a new VPC in the same account.The new VPC will be peered with the development VPC.The VPC CIDR block for the development VPC is 192.168.0.0/24.The solutions architect needs to create a CIDR block for the new VPC.The CIDR block must be valid for a VPC peering connection to the development VPC.

What is the SMALLEST CIDR block that meets these requirements?

10.0.1.0/32

192.168.0.0/24

192.168.1.0/32

10.0.1.0/24

Explanations:

10.0.1.0/32 is a host address and does not provide a valid CIDR block for a VPC. CIDR blocks for VPCs must be at least /16 or /24 for practical usage, and /32 is not valid for a VPC.

192.168.0.0/24 is the CIDR block of the existing development VPC. A VPC cannot have the same CIDR block as another VPC it peers with; hence, this option is invalid.

192.168.1.0/32 is also a host address and does not provide a valid CIDR block for a VPC. A /32 CIDR block cannot be used for a VPC, as it must allocate more than one address.

10.0.1.0/24 is a valid CIDR block for a new VPC. It does not overlap with the development VPC’s CIDR block (192.168.0.0/24), and is appropriate for VPC peering. It allows for a larger subnet with 256 addresses.

2026-03-16

2 Comments

  1. Judy
    Author

    I infer that the answer is:
    10.0.1.0/24

  2. Heather
    Author

    I believe the answer is:
    10.0.1.0/24

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