Which CIDR Notation Mask is Assigned to a VPC with IPv6 IP Addresses?
Question
Which of the below CIDR notation mask is assigned to a VPC which holds IPv6 IP addresses?
Answers
Explanations
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A. B. C. D.Answer - C.
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 the VPC , please refer to the below URL:
https://aws.amazon.com/vpc/faqs/
When a VPC is created, it can be assigned an IPv4 CIDR block and/or an IPv6 CIDR block.
IPv6 addresses use a 128-bit address space, which is significantly larger than the 32-bit address space used by IPv4. This allows for an almost unlimited number of unique addresses, making it possible to assign a unique address to every device on the planet and then some.
IPv6 addresses are usually assigned using a /64 prefix. A /64 prefix is the smallest block of IPv6 addresses that can be assigned to a network. It contains 2^64 unique addresses, which is enough to assign a unique address to every device on the network.
Therefore, the answer to the question is D. /64. A /64 prefix is assigned to a VPC which holds IPv6 IP addresses. It is the smallest block of IPv6 addresses that can be assigned to a network.
To summarize:
- IPv4 addresses use a 32-bit address space and are assigned using a prefix in the range of /16 to /28.
- IPv6 addresses use a 128-bit address space and are assigned using a prefix of /64.