What is the fixed size allocated to a VPC for IPv6 CIDR blocks?
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A. B. C. D.Answer - B.
This is mentioned in the AWS documentation.
For IPv6, the VPC is a fixed size of /56 (in CIDR notation)
A VPC can have both IPv4 and IPv6 CIDR blocks associated to it.
For more information on VPC's, please refer to the below link:
https://aws.amazon.com/vpc/faqs/In Amazon Web Services (AWS), a Virtual Private Cloud (VPC) is a virtual network that is dedicated to a user's AWS account. It provides a logically isolated section of the AWS Cloud where users can launch Amazon Elastic Compute Cloud (EC2) instances, Amazon Relational Database Service (RDS) instances, and other resources in a virtual network.
IPv6 CIDR blocks are assigned to VPCs in AWS for the purpose of enabling communication between resources in a VPC and the Internet. A CIDR block is a range of IP addresses in CIDR notation that are reserved for use within a VPC.
The IPv6 CIDR blocks that are assigned to a VPC in AWS have a fixed size of /56. This is different from the IPv4 CIDR blocks, which can be allocated in sizes ranging from /16 to /28. The /56 prefix length provides a large number of IPv6 addresses that can be used within a VPC, making it easier to support large-scale deployments of resources in AWS.
To summarize, the correct answer to the exam question is B. /56.