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ANS-C01 · Question #89

ANS-C01 Question #89: Real Exam Question with Answer & Explanation

The correct answer is D: A VPC with a /20 CIDR and two /23 subnets. B works because you will immediately have provision of 2x /21 subnets with 2,048 addresses in each, but that's all /20 addresses consumed so no more growth other than for WorkSpaces. D is the better answer because this immediately provides 1,024 IP addresses for WorkSpaces (minus

Submitted by jakub_pl· Mar 6, 2026Network Design

Question

An architecture is being designed to support an Amazon WorkSpaces deployment of 1,000 desktops. Which architecture will support this deployment while allowing for future expansion?

Options

  • AA VPC with a /16 CIDR and one /21 subnet
  • BA VPC with a /20 CIDR and two /21 subnets
  • CA VPC with a /16 CIDR and one /22 subnet
  • DA VPC with a /20 CIDR and two /23 subnets

Explanation

B works because you will immediately have provision of 2x /21 subnets with 2,048 addresses in each, but that's all /20 addresses consumed so no more growth other than for WorkSpaces. D is the better answer because this immediately provides 1,024 IP addresses for WorkSpaces (minus the usual) so works from day 1 with additional CIDR space available for allocation to WorkSpaces and/or other services within the VPC as it grows.

Topics

#Amazon WorkSpaces#VPC sizing#Subnetting#Network scaling

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