Steps to Enable IPv6 Communication in VPCs | Exam Question Answer
Question
You are working as a Network Engineer for a large telecom company.
For IT infrastructure, there are several VPCs created in separate regions.
For newly developed applications, the Development team needs to test applications with the IPv6 CIDR range.
For this, you are being assigned to create a roadmap for deployment.
To fulfill this requirement, which of the following steps are required to enable VPC for IPv6 communication? (Select Three)
Answers
Explanations
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A. B. C. D. E.Correct Answer - A, C and D.
For enabling VPC for IPv6 communications, following steps needs to be taken,
1)Associate an IPv6 CIDR block with VPC.2)Enable EC2 instance with IPv6.
3)Create routes in the route table for IPv6 communication.
Option B is incorrect as IPv6 needs to be associate with VPC & not with the account.
Option E is incorrect as on the existing VPC, IPV6 can be enabled & IPv4 needs to enable for IPv6 communication.
For more information on IPv6 for VPC, refer to the following URL.
https://docs.aws.amazon.com/vpc/latest/userguide/vpc-migrate-ipv6.htmlTo enable VPC for IPv6 communication, the following steps are required:
A. Associate IPv6 CIDR block with each VPC: Associating an IPv6 CIDR block with each VPC enables the VPC to communicate over IPv6. The IPv6 CIDR block must be associated with a VPC before you can associate it with a subnet.
B. Associate IPv6 CIDR block with each account: Associating an IPv6 CIDR block with each account enables you to use IPv6 addresses across all of your VPCs. You can use the same IPv6 CIDR block for multiple VPCs within an account.
C. Enable instance in specific VPC & assign IPv6 address for IPv6 communication: To enable instances in a VPC to communicate over IPv6, you need to enable IPv6 for the instance and assign it an IPv6 address. You can assign an IPv6 address to an instance during launch or after it has been launched.
D. Create a route in the route table attached to the VPC for IPv6 communication: To enable communication over IPv6, you need to create a route in the route table attached to the VPC. This route should have the destination set to the IPv6 CIDR block of the VPC, and the target set to the internet gateway or NAT gateway.
E. Create a new VPC with IPv4 disabled & enable IPv6 for VPC: Creating a new VPC with IPv4 disabled and enabling IPv6 for the VPC will allow the VPC to communicate exclusively over IPv6. This approach is useful if you want to create a VPC that is dedicated to IPv6 communication only.
In summary, to enable VPC for IPv6 communication, you need to associate an IPv6 CIDR block with each VPC and each account, enable instances in the VPC to communicate over IPv6, create a route in the route table attached to the VPC for IPv6 communication, and optionally create a new VPC with IPv4 disabled and enable IPv6 for the VPC.
