Compute - Application Load Balancer

Question 1

At which layer of the OSI model does the Application Load Balancer (ALB) operate?

Answer 1

• Layer 7, the application layer.

Question 2

What are some examples of application processes or services offered by the application layer of the OSI model?

Answer 2

• HTTP
• FTP
• SMTP
• NFS

Question 3

When is it recommended to use the Application Load Balancer (ALB)?

Answer 3

• When you need a flexible feature set including advanced routing and visibility features.
• When you are working with application architectures such as microservices and containers.
• When using HTTP or HTTPS protocols.

Question 4

What is a target group in the context of an ALB?

Answer 4

• A group of resources that the ALB routes requests to.
• Different target groups can be configured based on the nature of the requests.

Question 5

How can you configure a target group for an ALB?

Answer 5

• Go to the EC2 service in the AWS Management Console.
• Under the load balancing section, select “Target Groups.”
• Click on “Create target group” and provide the necessary information such as name, target type, protocol, and VPC.
• Configure health check settings if desired.
• Add targets (instances) to the target group.

Question 6

How can you create an Application Load Balancer (ALB)?

Answer 6

• Go to the AWS Management Console and navigate to the load balancing section.
• Select “Load Balancers” and click on “Create Load Balancer.”
• Choose “Application Load Balancer.”
• Provide a name and select the appropriate settings such as listener protocol and port.
• Configure availability zones and security settings.
• Select or create a target group.
• Review the configuration and click on “Create.”

Question 7

How can you customize traffic routing with ALB listeners?

Answer 7

• In the ALB configuration, go to the “Listeners” tab.
• View and edit the rules for the listener.
• Add conditions such as source IP and specify actions, such as forwarding to different target groups, based on the conditions.
• Rules allow for customized traffic routing based on specific criteria.

Question 8

What are some additional options available when configuring an ALB?

Answer 8

• Setting up target groups
• Configuring security groups
• Defining availability zones
• Customizing traffic routing through listener rules

Question 9

What are some monitoring options available for ALBs?

Answer 9

• CloudWatch metrics associated with the ALB, such as the number of healthy and unhealthy hosts.
• Monitoring metrics provide insights into the performance and health of the load balancer.

Question 10

What type of security considerations should be taken into account when configuring ALBs?

Answer 10

• Consider using HTTPS for secure communication.
• Set up appropriate security groups to control access to the load balancer.
• Configure health checks to ensure the availability and health of target instances.