- A
Change the load balancing algorithm to least connections.
Why wrong: Algorithm change does not increase network capacity.
- B
Distribute instances across multiple availability zones.
Multi-zone deployment can improve resilience and distribute load across network paths.
- C
Upgrade to an instance type with higher network bandwidth.
Higher bandwidth directly addresses network throughput limit.
- D
Increase the number of backend instances.
Why wrong: More instances distribute requests but each still has same bandwidth limit; overall throughput may still be constrained by bandwidth per instance if traffic is not evenly distributed.
- E
Enable connection draining on the load balancer.
Connection draining helps manage traffic during scale-in or instance failures, improving user experience.
Quick Answer
The answer is to enable connection draining, distribute instances across multiple availability zones, and add more backend instances. This resolves a load balancer network throughput bottleneck because when network throughput is near the instance limit but CPU utilization remains low, the issue is not compute power but rather saturated network I/O on individual instances. Connection draining ensures in-flight requests complete gracefully before an instance is taken out of rotation, preventing dropped connections during scaling events. Spreading instances across multiple AZs leverages cross-zone load balancing to distribute traffic across physically separate infrastructure, reducing congestion on any single network path. On the CompTIA Cloud+ CV0-004 exam, this scenario tests your ability to differentiate between compute-bound and network-bound performance problems—a common trap is to scale CPU instead of addressing network limits. Memory tip: think “low CPU, high network = spread the load, don’t beef the node.”
CV0-004 Operations and Support Practice Question
This CV0-004 practice question tests your understanding of operations and support. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 cloud engineer is troubleshooting a performance issue with a web application that uses a cloud load balancer and multiple backend instances. Users report intermittent slow responses. The engineer reviews metrics and finds that CPU utilization on backend instances stays below 50% but network throughput is near the instance limit. Which THREE actions should the engineer take to improve performance?
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
Distribute instances across multiple availability zones.
Distributing instances across multiple availability zones (AZs) improves fault tolerance and can reduce network congestion by spreading traffic across physically separate infrastructure. In this scenario, network throughput is near the instance limit, so adding instances in different AZs allows the load balancer to distribute traffic more evenly, preventing any single instance from being overwhelmed. This also leverages the load balancer's cross-zone load balancing capability, which can improve overall throughput and reduce latency for users.
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.
- ✗
Change the load balancing algorithm to least connections.
Why it's wrong here
Algorithm change does not increase network capacity.
- ✓
Distribute instances across multiple availability zones.
Why this is correct
Multi-zone deployment can improve resilience and distribute load across network paths.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Upgrade to an instance type with higher network bandwidth.
Why this is correct
Higher bandwidth directly addresses network throughput limit.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Increase the number of backend instances.
Why it's wrong here
More instances distribute requests but each still has same bandwidth limit; overall throughput may still be constrained by bandwidth per instance if traffic is not evenly distributed.
- ✓
Enable connection draining on the load balancer.
Why this is correct
Connection draining helps manage traffic during scale-in or instance failures, improving user experience.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that increasing the number of instances always solves performance issues, when in reality the bottleneck may be the network bandwidth per instance, requiring a larger instance type or distribution across AZs to utilize aggregate bandwidth.
Detailed technical explanation
How to think about this question
Cloud load balancers, such as AWS ALB or NLB, support cross-zone load balancing which evenly distributes traffic across all registered instances in all enabled AZs. When network throughput is the bottleneck, upgrading to an instance type with higher network bandwidth (e.g., from a t3.medium to a c5.large) directly increases the available network I/O credits or baseline bandwidth. Additionally, enabling connection draining ensures that in-flight requests complete gracefully before an instance is deregistered, preventing dropped connections during scaling events or maintenance.
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 practitioner preparing for the CV0-004 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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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CV0-004 practice test guide
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FAQ
Questions learners often ask
What does this CV0-004 question test?
Operations and Support — This question tests Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Distribute instances across multiple availability zones. — Distributing instances across multiple availability zones (AZs) improves fault tolerance and can reduce network congestion by spreading traffic across physically separate infrastructure. In this scenario, network throughput is near the instance limit, so adding instances in different AZs allows the load balancer to distribute traffic more evenly, preventing any single instance from being overwhelmed. This also leverages the load balancer's cross-zone load balancing capability, which can improve overall throughput and reduce latency for users.
What should I do if I get this CV0-004 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: Jun 30, 2026
This CV0-004 practice question is part of Courseiva's free CompTIA 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 CV0-004 exam.
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