A company is migrating a legacy application that uses a proprietary UDP-based protocol. The application will be hosted on EC2 instances across multiple Availability Zones. The company needs a load balancer to distribute the UDP traffic. Which AWS load balancer should they use?

Answer options:

Application Load Balancer (ALB)

Network Load Balancer (NLB)

Classic Load Balancer (CLB)

Gateway Load Balancer (GWLB)

How to approach this question

Match 'UDP traffic' to Network Load Balancer.

Full Answer

B.Network Load Balancer (NLB)✓ Correct

Network Load Balancer (NLB)

The Network Load Balancer (NLB) is designed to handle volatile traffic patterns and extreme performance requirements. It operates at the connection level (Layer 4) and is the only AWS load balancer that natively supports UDP traffic.

Common mistakes

Choosing ALB, which only supports Layer 7 (HTTP/HTTPS).

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