What is the MOST operationally efficient solution to resolve this issue?

A company is hosting an application on Amazon EC2 instances behind a Network Load Balancer (NLB). A solutions architect added EC2 instances in a second Availability Zone to improve the availability of the application. The solutions architect added the instances to the NLB target group.

The company’s operations team notices that traffic is being routed only to the instances in the first Availability Zone.

What is the MOST operationally efficient solution to resolve this issue?
A . Enable the new Availability Zone on the NLB
B . Create a new NLB for the instances in the second Availability Zone
C . Enable proxy protocol on the NLB
D . Create a new target group with the instances in both Availability Zones

View Answer

Answer: A

Explanation:

When adding instances in a new Availability Zone to an existing Network Load Balancer (NLB), it is important to ensure that the new Availability Zone is enabled on the NLB. This will allow traffic to be routed to instances in both Availability Zones. This can be done by editing the settings of the NLB and selecting the new Availability Zone from the list of available zones.