Question 767 of 1,000

Cloud Concepts, Architecture, and Design →mediumMultiple SelectObjective-mapped

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 valid methods for achieving multitenancy isolation in a public cloud IaaS environment?

A
Encrypting data at rest with tenant-specific keys
Encryption prevents unauthorized access.
B
Using a single database schema for all tenants
Why wrong: That would allow data mixing; not isolated.
C
Storage area network (SAN) zoning to separate tenant data
Network-level storage isolation.
D
Shared memory segments across tenants for performance
Why wrong: Shared memory would violate isolation.
E
Hypervisor-level isolation between virtual machines
Hypervisor enforces VM separation.

Full breakdown with real-world context →

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

✓

Encrypting data at rest with tenant-specific keys

Hypervisor isolation, storage network segmentation (e.g., VLANs), and data encryption at rest are all valid isolation methods. Shared memory and single database schema for all tenants would break isolation.

Key principle: OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

✓
Encrypting data at rest with tenant-specific keys
Why this is correct
Encryption prevents unauthorized access.
Related concept
OSPF neighbours must agree on key parameters.
✗
Using a single database schema for all tenants
Why it's wrong here
That would allow data mixing; not isolated.
✓
Storage area network (SAN) zoning to separate tenant data
Why this is correct
Network-level storage isolation.
Related concept
OSPF neighbours must agree on key parameters.
✗
Shared memory segments across tenants for performance
Why it's wrong here
Shared memory would violate isolation.
✓
Hypervisor-level isolation between virtual machines
Why this is correct
Hypervisor enforces VM separation.
Related concept
OSPF neighbours must agree on key parameters.

Common exam traps

Common exam trap: OSPF can fail even when IP connectivity looks correct

OSPF neighbour formation depends on matching areas, timers, network type, authentication and passive-interface behaviour. Do not choose an answer only because the devices can ping.

Detailed technical explanation

How to think about this question

OSPF questions usually test the details that control adjacency and route selection. Read the neighbour state, area, router ID and interface configuration before deciding what is wrong.

KKey Concepts to Remember

OSPF neighbours must agree on key parameters.
Router ID selection can affect neighbour relationships and LSDB output.
OSPF cost influences the preferred path.
A route can appear in OSPF information but not become the installed route.

TExam Day Tips

Check area mismatch first when OSPF adjacency fails.
Review passive interfaces when a network is advertised but no neighbour forms.
Use show ip ospf neighbor and show ip route clues carefully.

Key takeaway

OSPF neighbour adjacency depends on matching area, hello/dead timers, network type, and authentication — IP reachability alone is not enough.

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.

Visual reference

What to study next

Got this wrong? Here's your next step.

Review OSPF neighbour requirements — matching area type, hello and dead timers, network type, stub flags, and authentication. Study show ip ospf neighbor states (INIT, 2-WAY, FULL). Then practise related CCSP OSPF questions on adjacency and route selection.

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FAQ

Questions learners often ask

What does this CCSP question test?

Cloud Concepts, Architecture, and Design — This question tests Cloud Concepts, Architecture, and Design — OSPF neighbours must agree on key parameters..

What is the correct answer to this question?

The correct answer is: Encrypting data at rest with tenant-specific keys — Hypervisor isolation, storage network segmentation (e.g., VLANs), and data encryption at rest are all valid isolation methods. Shared memory and single database schema for all tenants would break isolation.

What should I do if I get this CCSP question wrong?

What is the key concept behind this question?

OSPF neighbours must agree on key parameters.

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Last reviewed: Jul 4, 2026

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