You`re working as a consultant for a company that has a three-tier application. The application layer of this architecture sends over 20Gbps of data during peak hours to and from Amazon S3. Currently, you`re running two NAT gateways in two subnets to transfer the data from your private application layer to Amazon S3. You will also need to ensure that the instances receive software patches from a third-party repository without leaving the AWS network. What architecture changes should be made, if any?

Answer options:

A.Add another NAT gateway.
B.Add a VPC endpoint.
C.Add an Internet gateway for better throughput.
D.Add a VPN connection for better throughput.

Answer – B
The AWS Documentation mentions the following.
A VPC endpoint enables you to privately connect your VPC to supported AWS services and VPC endpoint services powered by PrivateLink without requiring an internet gateway, NAT device, VPN connection, or AWS Direct Connect connection. Instances in your VPC do not require public IP addresses to communicate with resources in the service. Traffic between your VPC and the other service does not leave the Amazon network.
Option A is incorrect since the 2 NAT gateways are sufficient. The NAT gateway can scale up to 45 Gbps.
Option C is incorrect since the subnet needs to remain private.
Option D is incorrect because the bandwidth can degrade due to a VPN connection.
For more information on VPC endpoints, one can visit the below URL
https://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/vpc-endpoints.html