Your company has just set up a new document server on it`s AWS VPC, and it has four very important clients that it wants to give access to. These clients also have VPCs on AWS and it is through these VPCs that they will be given accessibility to the document server. In addition, each of the clients should not have access to any of the other clients` VPCs. Choose the correct answer from the options below

Answer options:

A.Set up VPC peering between your company`s VPC and each of the clients` VPCs.
B.Set up VPC peering between your company`s VPC and each of the clients` VPCs, but block the IPs from CIDR of the clients` VPCs to deny them access to each other.
C.Set up VPC peering between your company`s VPC and each of the clients` VPC. Each client should have VPC peering set up between each other to speed up access time.
D.Set up all the VPCs with the same CIDR but have your company`s VPC as a centralized VPC.

Answer – A
A VPC peering connection is a networking connection between two VPCs that enables you to route traffic between them using private IPv4 addresses or IPv6 addresses. Instances in either VPC can communicate with each other as if they are within the same network. You can create a VPC peering connection between your own VPCs, or with a VPC in another AWS account within a single region.
There is no need to setup client VPC peering between each other because this is a clear requirement in the question, hence option C is wrong.
There is no need to block IP’s hence Option B is wrong.
VPC peering needs to have the basic functionality that the CIDR’s should not overlap, hence option D is wrong.
For more information on VPC Peering please see the below link:
http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-peering.html