Load Balancers

Question 1

What are the three types of load balancers?

Answer 1

Application Load Balancers
Network Load Balancers
Classic Load Balancers

Question 2

What are the components of an Application Load Balancer?

Answer 2

Listener - Checks for connection requests.
Target group - collection of running target instances
Load Balancer - Point of concat for the clients

Question 3

What are the properties of an ALB rule?

Answer 3

Target Group
Condition
Priority

Question 4

ALB Health Checks are configure per:

Answer 4

Target Group

Question 5

At what layer does an ALB operate?

Answer 5

7th

Question 6

What bitmask is required for an ALB to scale properly?

Answer 6

/27

Question 7

How many free IP addresses are required for an ALB to scale properly?

Answer 7

At least 8

Question 8

What is the default idle timeout for an ALB?

Answer 8

60 seconds

Question 9

What protocols are supported by an ALB listener?

Answer 9

HTTP/HTTPS

Question 10

Are websockets supported by ALB?

Answer 10

Yes

Question 11

What are the default ALB listener rules?

Answer 11

Default Action - If requests otherwise not routed

Question 12

What are the ALB Rule Action Types

Answer 12

authenticate-cognito
authenticate-oidc
fixed-reponse
forward
redirect

Question 13

Which ALB rule action sends request to a target group?

Answer 13

Forward

Question 14

What ALB rule should be used for a custom http response

Answer 14

Fixed Response Rules

Question 15

What are the ALB rule condition types?

Answer 15

host-header
http-header
http-request-method
path-pattern
query-string
source-ip

Question 16

What ALB rule condition should be used for filtering user agents?

Answer 16

http-header (user-agent header)

Question 17

What are the 3 target types for an ALB target group

Answer 17

instance
ip
lambda

Question 18

What kinds of IPs can you specify for ALB target groups with type IP?

Answer 18

The subnets of the VPC for the target group.
A bunch of RFC ips
NOT publicly routable IP addresses.

Question 19

What ALB target group type can be used for scaling?

Answer 19

Instance IDs can be used with Auto scaling groups.

Question 20

What is the default timeout for ALB to wait before deregistering a target?

Answer 20

300s

Question 21

What is the default slow start (ie: delay before sending a share of the traffic) for a new target?

Answer 21

0 seconds

Question 22

What is the default sticky cookie duration for an ALB?

Answer 22

1 day

Question 23

What is the state of a deregistering target in ALB?

Answer 23

draining