You’ve set up a Load Balancer in AWS. You’ve set up EC2 Instances in multiple availability zones. You also ensure the load balancer has these availability zones added to it. Which of the following will ensure that traffic gets distributed across the registered targets in all enabled Availability Zones?

Answer options:

A.Enable Sticky Sessions.
B.Enable cross-zone load balancing.
C.Enable proxy protocol.
D.Enable connection draining.

Correct Answer: B
This is given in the AWS Documentation.
The nodes for your load balancer distribute requests from clients to registered targets. When cross-zone load balancing is enabled, each load balancer node distributes traffic across the registered targets in all enabled Availability Zones. When cross-zone load balancing is disabled, each load balancer node distributes traffic across the registered targets in its Availability Zone only.
Option A is incorrect since this binds a user`s session to a specific instance.
Option C is incorrect since this is used to carry connection information from the source requesting the connection to the destination for which the connection was requested.
Option D is incorrect since this is used to stop sending requests to instances that are de-registering or unhealthy.
For more information on how load balancing works, please refer to the below URL-
https://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/how-elastic-load-balancing-works.html