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Question 419 - SOA-C02 discussion

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The company wants to improve the security and high availability of a two-tier web application that was rehosted to AWS, currently in a single Availability Zone.

A.

Place the web-tier instances in an Auto Scaling group. Configure the Auto Scaling group to support a Multi-AZ deployment into private subnets that are behind an internet-facing Application Load Balancer.

Answers
A.

Place the web-tier instances in an Auto Scaling group. Configure the Auto Scaling group to support a Multi-AZ deployment into private subnets that are behind an internet-facing Application Load Balancer.

B.

Place the web-tier instances in an Auto Scaling group. Configure the Auto Scaling group in multiple AWS Regions. Deploy the EC2 instances into private subnets that are behind an internet-facing Application Load Balancer.

Answers
B.

Place the web-tier instances in an Auto Scaling group. Configure the Auto Scaling group in multiple AWS Regions. Deploy the EC2 instances into private subnets that are behind an internet-facing Application Load Balancer.

C.

Launch an additional EC2 instance to host SQL Server. Place the new database EC2 instance in a second AWS Region. Enable replication between the two database EC2 instances.

Answers
C.

Launch an additional EC2 instance to host SQL Server. Place the new database EC2 instance in a second AWS Region. Enable replication between the two database EC2 instances.

D.

Use AWS Database Migration Service (AWS DMS) to migrate the database EC2 instance to Amazon RDS for SQL Server with Multi-AZ Database Mirroring (DBM).

Answers
D.

Use AWS Database Migration Service (AWS DMS) to migrate the database EC2 instance to Amazon RDS for SQL Server with Multi-AZ Database Mirroring (DBM).

E.

Use AWS Database Migration Service (AWS DMS) to migrate the database EC2 instance to Amazon DynamoDB.

Answers
E.

Use AWS Database Migration Service (AWS DMS) to migrate the database EC2 instance to Amazon DynamoDB.

Suggested answer: A, D

Explanation:

To improve security and availability, the best approach is to configure Multi-AZ for both the web and database tiers.

Multi-AZ Auto Scaling for Web Tier: Deploying the web-tier instances in an Auto Scaling group across multiple AZs with an internet-facing ALB provides high availability and fault tolerance.

RDS Multi-AZ for SQL Server: Migrating the SQL Server to RDS with Multi-AZ deployment ensures database redundancy and failover without additional management overhead.

Placing the web tier in multiple Regions would add unnecessary complexity, and migrating the database to DynamoDB is not suitable for applications requiring SQL Server's relational capabilities.

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asked 06/11/2024
Kunle Fodeke
44 questions
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