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Networking and Content Delivery →easyMultiple ChoiceObjective-mapped

SOA-C02 Networking and Content Delivery Practice Question

This SOA-C02 practice question tests your understanding of networking and content delivery. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

A company has an application that requires UDP traffic to be distributed across multiple EC2 instances. Which AWS load balancer type should be used?

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

A Network Load Balancer (NLB) operates at Layer 4 and can handle both TCP and UDP traffic, making it the correct choice for distributing UDP traffic across multiple EC2 instances. Unlike other load balancers, NLB preserves the source IP address and can forward UDP packets without inspecting application-layer headers, which is essential for UDP-based applications such as DNS, VoIP, or gaming servers.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

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

    Why this is correct

    NLB supports TCP, UDP, and TLS.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    Classic Load Balancer

    Why it's wrong here

    Classic Load Balancer does not support UDP.

  • ✗

    Amazon CloudFront

    Why it's wrong here

    CloudFront does not load balance; it caches content.

  • ✗

    Application Load Balancer

    Why it's wrong here

    ALB only supports HTTP/HTTPS.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates may confuse the Application Load Balancer's support for WebSockets (which start as HTTP) with UDP support, or assume the Classic Load Balancer can handle any Layer 4 protocol, but AWS specifically removed UDP support from CLB and ALB, reserving it for NLB.

Detailed technical explanation

How to think about this question

Under the hood, the Network Load Balancer uses a flow hash algorithm based on the 5-tuple (source IP, source port, destination IP, destination port, and protocol) to route UDP packets to a target, ensuring session stickiness without requiring a session cookie. In real-world scenarios, NLB is critical for handling real-time UDP traffic like SIP-based VoIP calls or multiplayer game servers, where packet loss and latency must be minimized. Additionally, NLB supports static IP addresses and can be assigned an Elastic IP, which is often required for whitelisting in firewall rules.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this SOA-C02 question test?

Networking and Content Delivery — This question tests Networking and Content Delivery — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Network Load Balancer — A Network Load Balancer (NLB) operates at Layer 4 and can handle both TCP and UDP traffic, making it the correct choice for distributing UDP traffic across multiple EC2 instances. Unlike other load balancers, NLB preserves the source IP address and can forward UDP packets without inspecting application-layer headers, which is essential for UDP-based applications such as DNS, VoIP, or gaming servers.

What should I do if I get this SOA-C02 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jul 4, 2026

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This SOA-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 SOA-C02 exam.