SAP-C02 Practice Question: Accelerate Workload Migration and Modernization
A company is migrating a legacy application to AWS. The application uses a proprietary binary protocol that is not HTTP-based. The application currently runs on a single server and communicates with clients over TCP port 4444. The company wants to use AWS Elastic Load Balancing to distribute traffic across multiple EC2 instances for high availability. Which load balancer type should the company use?
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) operates at the transport layer (Layer 4) and supports TCP traffic, including proprietary protocols over port 4444. Option A is incorrect because AWS Global Accelerator uses anycast IP to improve performance but does not function as a regional load balancer; it is typically used with ALB or NLB. Option B is incorrect because Classic Load Balancer (CLB) is a legacy option that supports TCP but lacks advanced features and is not recommended for new applications. Option D is incorrect because Application Load Balancer (ALB) only supports HTTP/HTTPS and cannot handle non-HTTP traffic.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
AWS Global Accelerator
Why it's wrong here
Global Accelerator is not a load balancer; it directs traffic to endpoints.
- ✗
Classic Load Balancer (CLB)
Why it's wrong here
CLB supports TCP but is legacy and not recommended for new applications.
- ✓
Network Load Balancer (NLB)
Why this is correct
NLB supports TCP at Layer 4 and can handle proprietary protocols.
- ✗
Application Load Balancer (ALB)
Why it's wrong here
ALB works at Layer 7 and only supports HTTP/HTTPS.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SAP-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SAP-C02 exam.