The answer is rapid elasticity. This is correct because NIST SP 800-145 defines rapid elasticity as the ability to scale cloud resources both up and down automatically and quickly, often appearing unlimited to the consumer, which is a fundamental differentiator from traditional on-premises infrastructure. On the Certified Cloud Security Professional CCSP exam, this characteristic is frequently tested alongside broad network access and on-demand self-service, and a common trap is confusing rapid elasticity with simple scalability—elasticity implies dynamic, automatic provisioning and de-provisioning, not just the ability to add more capacity. To remember the three essential NIST characteristics, think of the mnemonic “ROB” for Rapid elasticity, On-demand self-service, and Broad network access, which form the core of the cloud definition you must know for the exam.
CCSP Cloud Concepts, Architecture and Design Practice Question
This CCSP practice question tests your understanding of cloud concepts, architecture and design. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which THREE of the following are key characteristics of cloud computing as defined by NIST SP 800-145?
Resources are available over the network and accessed through standard mechanisms.
B
On-demand self-service
Users can provision resources automatically without human interaction.
C
Location independence
Why wrong: While cloud offers location independence, it is not one of the five NIST essential characteristics; 'resource pooling' is the characteristic.
D
Dedicated hardware per tenant
Why wrong: Cloud computing uses shared resources, not dedicated hardware per tenant.
E
Rapid elasticity
Capabilities can be elastically provisioned and released to scale rapidly.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Broad network access
Option A is correct because NIST SP 800-145 defines broad network access as the capability for cloud capabilities to be accessed over the network by standard mechanisms (e.g., HTTPS, SSH, VPN) that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, laptops, workstations). This characteristic ensures that resources are available from any location with internet connectivity, not limited to a single physical network segment.
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.
✓
Broad network access
Why this is correct
Resources are available over the network and accessed through standard mechanisms.
Related concept
Read the scenario before looking for a memorised answer.
✓
On-demand self-service
Why this is correct
Users can provision resources automatically without human interaction.
Related concept
Read the scenario before looking for a memorised answer.
✗
Location independence
Why it's wrong here
While cloud offers location independence, it is not one of the five NIST essential characteristics; 'resource pooling' is the characteristic.
✗
Dedicated hardware per tenant
Why it's wrong here
Cloud computing uses shared resources, not dedicated hardware per tenant.
✓
Rapid elasticity
Why this is correct
Capabilities can be elastically provisioned and released to scale rapidly.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the distinction between 'location independence' (a common misconception) and the actual NIST-defined characteristic of 'resource pooling,' where the consumer generally has no control over the exact physical location of resources but may specify at a higher level of abstraction (e.g., country, region, or availability zone).
Detailed technical explanation
How to think about this question
Under the hood, rapid elasticity (Option E) is enabled by orchestration tools like Kubernetes or OpenStack that automatically scale resources up or down based on predefined metrics (e.g., CPU utilization, request latency) using APIs that interact with hypervisors or container runtimes. In a real-world scenario, a sudden traffic spike to an e-commerce site triggers auto-scaling groups to provision additional VM instances within minutes, then de-provision them when demand drops, ensuring cost efficiency and performance without manual intervention.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
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.
Cloud Concepts, Architecture and Design — This question tests Cloud Concepts, Architecture and Design — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Broad network access — Option A is correct because NIST SP 800-145 defines broad network access as the capability for cloud capabilities to be accessed over the network by standard mechanisms (e.g., HTTPS, SSH, VPN) that promote use by heterogeneous thin or thick client platforms (e.g., mobile phones, laptops, workstations). This characteristic ensures that resources are available from any location with internet connectivity, not limited to a single physical network segment.
What should I do if I get this CCSP 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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Question Discussion
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