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Question 782 - SAA-C03 discussion

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A company is designing a new multi-tier web application that consists of the following components:

* Web and application servers that run on Amazon EC2 instances as part of Auto Scaling groups

* An Amazon RDS DB instance for data storage

A solutions architect needs to limit access to the application servers so that only the web servers can access them. Which solution will meet these requirements?

A.
Deploy AWS PrivateLink in front of the application servers. Configure the network ACL to allow only the web servers to access the application servers.
Answers
A.
Deploy AWS PrivateLink in front of the application servers. Configure the network ACL to allow only the web servers to access the application servers.
B.
Deploy a VPC endpoint in front of the application servers Configure the security group to allow only the web servers to access the application servers
Answers
B.
Deploy a VPC endpoint in front of the application servers Configure the security group to allow only the web servers to access the application servers
C.
Deploy a Network Load Balancer with a target group that contains the application servers' Auto Scaling group Configure the network ACL to allow only the web servers to access the application servers.
Answers
C.
Deploy a Network Load Balancer with a target group that contains the application servers' Auto Scaling group Configure the network ACL to allow only the web servers to access the application servers.
D.
Deploy an Application Load Balancer with a target group that contains the application servers' Auto Scaling group. Configure the security group to allow only the web servers to access the application servers.
Answers
D.
Deploy an Application Load Balancer with a target group that contains the application servers' Auto Scaling group. Configure the security group to allow only the web servers to access the application servers.
Suggested answer: D

Explanation:

Application Load Balancer (ALB): ALB is suitable for routing HTTP/HTTPS traffic to the application servers. It provides advanced routing features and integrates well with Auto Scaling groups.

Target Group Configuration:

Create a target group for the application servers and register the Auto Scaling group with this target group.

Configure the ALB to forward requests from the web servers to the application servers.

Security Group Setup:

Configure the security group of the application servers to only allow traffic from the web servers' security group.

This ensures that only the web servers can access the application servers, meeting the requirement to limit access.

Benefits:

Security: Using security groups to restrict access ensures a secure environment where only intended traffic is allowed.

Scalability: ALB works seamlessly with Auto Scaling groups, ensuring the application can handle varying loads efficiently.

Application Load Balancer

Security Groups for Your VPC

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asked 16/09/2024
Kimon Pope
32 questions
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