AWS Certified Solutions Architect – Professional — Question 499
You've been brought in as solutions architect to assist an enterprise customer with their migration of an e-commerce platform to Amazon Virtual Private Cloud
(VPC) The previous architect has already deployed a 3-tier VPC.
The configuration is as follows:
VPC: vpc-2f8bc447 -
IGW: igw-2d8bc445 -
NACL: ad-208bc448 -
Subnets and Route Tables:
Web servers: subnet-258bc44d -
Application servers: subnet-248bc44c
Database servers: subnet-9189c6f9
Route Tables:
rrb-218bc449
rtb-238bc44b
Associations:
subnet-258bc44d : rtb-218bc449
subnet-248bc44c : rtb-238bc44b
subnet-9189c6f9 : rtb-238bc44b
You are now ready to begin deploying EC2 instances into the VPC Web servers must have direct access to the internet Application and database servers cannot have direct access to the internet.
Which configuration below will allow you the ability to remotely administer your application and database servers, as well as allow these servers to retrieve updates from the Internet?
Answer options
- A. Create a bastion and NAT instance in subnet-258bc44d, and add a route from rtb- 238bc44b to the NAT instance.
- B. Add a route from rtb-238bc44b to igw-2d8bc445 and add a bastion and NAT instance within subnet-248bc44c.
- C. Create a bastion and NAT instance in subnet-248bc44c, and add a route from rtb- 238bc44b to subnet-258bc44d.
- D. Create a bastion and NAT instance in subnet-258bc44d, add a route from rtb-238bc44b to Igw-2d8bc445, and a new NACL that allows access between subnet-258bc44d and subnet-248bc44c.
Correct answer: A
Explanation
Option A is correct because it allows the application and database servers in subnet-248bc44c to route their internet-bound traffic through the NAT instance, which is essential for downloading updates while keeping them private. The other options either incorrectly route traffic or place the NAT instance in a subnet that does not facilitate the required internet access for the application and database servers.