SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a legacy application that uses a proprietary binary protocol over TCP. The application must be migrated with minimal changes and requires high throughput. Which AWS service should the architect recommend for load balancing?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Network Load Balancer (NLB)
Network Load Balancer (NLB) is designed for TCP traffic at high throughput with minimal latency, making it ideal for migrating legacy applications using proprietary binary protocols over TCP. Option B (AWS Global Accelerator) improves application performance by directing traffic over the AWS global network but is not a load balancer. Option C (Application Load Balancer) operates at Layer 7 and is best for HTTP/HTTPS traffic, not TCP. Option D (Classic Load Balancer) is a legacy option that lacks the performance and features of NLB.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Network Load Balancer (NLB)
Why this is correct
NLB operates at Layer 4 and handles TCP traffic with high throughput.
- ✗
AWS Global Accelerator
Why it's wrong here
Global Accelerator improves routing but is not a load balancer; it works with NLB or ALB.
- ✗
Application Load Balancer (ALB)
Why it's wrong here
ALB operates at Layer 7 (HTTP/HTTPS), not for arbitrary TCP protocols.
- ✗
Classic Load Balancer (CLB)
Why it's wrong here
CLB is legacy and less performant than NLB.
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