Scalability vs. Elasticity: Which Cloud Concept Auto-Adjusts Resources?
Short answer
D Elasticity
Question
Key Takeaways
The exam tests the difference between scalability—planned expansion to handle growth—and elasticity—automatic scaling up and down in real time to match demand and reduce cost when resources are no longer needed.
This CompTIA Network+ N10-008 question asks which cloud concept best supports dynamically adding and removing virtual resources for tournament demand while controlling costs. The exam community overwhelmingly confirms the correct answer is elasticity, not scalability.
Common mistake: Choosing Scalability is the most common mistake because it is often confused with elasticity; however, scalability alone does not guarantee that resources will automatically shrink back to baseline levels, which is the key requirement in the question.
Expert Analysis
Why the Answer Is Correct
Elasticity is the cloud concept that describes a system's ability to automatically provision and release virtual resources based on real-time demand. In the scenario, tournament demand spikes cause a sudden increase in users, and the company needs to deploy more resources during that time. After the tournament, those resources must be reduced back to baseline to lower costs. Elasticity fits perfectly because it enables both scaling out during peak load and scaling back in when demand drops.
Why the Other Options Are Wrong
Scalability is the ability to handle increased workload by adding resources, but it does not inherently include dynamic shrinking to save cost—it is usually more of a planned or long-term capability. Hybrid refers to combining public and private cloud environments, which is not specifically about resource adjustment. Multitenancy is about multiple customers sharing the same physical infrastructure, not about scaling resources based on demand. Therefore, only elasticity addresses the automatic up-and-down behavior described in the question.
Community Comment Notes
Useful community comments support elasticity over scalability. One commenter notes that elasticity means 'automatically adjusts computing resources based on real-time demand, allowing for dynamic scaling up or down to optimize costs and performance.' Another explains that scalability can be seen as 'planning for future events in need of' resources, while elasticity is 'live and dynamic expanding and contracting in real time.' These distinctions align with the correct answer D.
Official Reference
- https://csrc.nist.gov/publications/detail/sp/800-145/final
- https://aws.amazon.com/what-is-cloud-computing/
- https://www.comptia.org/certifications/network
These links open the official vendor documentation in a new tab.
Exam Strategy
On exam day, look for keywords such as 'automatically,' 'return to baseline,' and 'reduce cost'—those words signal elasticity. If the scenario only describes increasing capacity for future growth without shrinking, then scalability is the better choice.
Community Votes
100% of anonymous learners picked answer D. Votes are pick records left by other test-takers — they are not the verified answer.
Discussion 3 contributions
Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.
From public community threads 3
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Hundo_954 👍 4 Answered DElasticity: Automatically adjusts computing resources based on real-time demand, allowing for dynamic scaling up or down to optimize costs and performance. Hybrid: Combines different types of cloud environments (such as public and private clouds) to leverage the advantages of each, offering flexibility and scalability. Scalability: Refers to the ability of a system to handle increased workload by adding resources, either vertically (more powerful hardware) or horizontally (more machines or instances). Multitenancy: A single instance of software serves multiple customers or tenants, allowing them to share common infrastructure and resources
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BigDazza_111 👍 3 Answered DI think of scalabilit as 'planning for future events in the need of', and elasticity as being live and dynamic expanding and contracting in real time. IDK
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JB1705 👍 3 Answered DElasticity - horizontal resource addition - Temp solution Scalability - Vertical resource addition - long term solution.
Reader comments & corrections
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