ELB & ASG

Question 1

What are the two kinds of scalability?

Answer 1

Vertical and Horizontal

Question 2

What is Vertical Scalability?

Answer 2

Increasing the computing power or overall size of the instance.

Question 3

What is Horizontal Scalability?

Answer 3

Increasing the number of available instances to run your workload.

Question 4

What is the difference between Scalability and Elasticity?

Answer 4

Scalability scales up or out the resources needed and elasticity is the ability to scale back down and in.

Question 5

What service automatically distributes incoming application traffic across multiple targets and virtual appliances in one or more Availability Zones (AZs)?

Answer 5

AWS ELB (Elastic Load Balancer)

Question 6

What are the three types of Load Balancers in AWS?

Answer 6

Application, Network, and Gateway

Question 7

Which Load Balancer is for HTTP and HTTPS only at Layer 7?

Answer 7

Application Load Balancer

Question 8

Which Load Balancer is for TCP at Layer 4?

Answer 8

Network Load Balancer

Question 9

Which Load Balancer lets you easily deploy, scale, and manage your third-party virtual appliances and is for GENEVE at Layer 3?

Answer 9

Gateway Load Balancer

Question 10

What service automatically scales out the number of available EC2 instances to manage workloads?

Answer 10

Auto Scaling Group (ASG)

Question 11

What are the 3 Scaling Group Strategies?

Answer 11

Manual Scaling - update the ASG size manually
Dynamic Scaling - react to demand or alarms
Predictive Scaling - use ML to predict future traffic patterns