N10-009 - Networking Concepts (23% of the exam) - Section 1.3

Summarize cloud concepts and connectivity options, including service models, deployment models, and connectivity such as VPN, SD-WAN, and direct connect.

Summarise the cloud service models (IaaS, PaaS, SaaS) and deployment models (public, private, hybrid, community), and explain elasticity, scalability, and multitenancy. Compare connectivity options that link on-premises networks to cloud resources - site-to-site VPN, SD-WAN, and dedicated direct-connect circuits - and recognise the security and performance trade-offs of each.

IaaS/PaaS/SaaSCloud deployment modelsSD-WANVPN connectivity

Practice question for this objective

Free sampleNetworking Conceptsmedium

An organisation contracts with two separate public cloud providers to run its production services, spreading workloads across both to avoid dependence on any single vendor, and it operates no private cloud of its own. Which term best describes this approach?

AA multi-cloud deployment Correct
BA hybrid cloud deployment
CA community cloud deployment
DA private cloud deployment

Multi-cloud means using two or more public cloud providers concurrently to avoid vendor lock-in, distinct from hybrid cloud which adds a private tier. A multi-cloud strategy uses two or more public cloud providers at the same time, usually to reduce vendor lock-in and improve resilience, and it does not require the private cloud tier that a hybrid cloud does.

Why A is correct: Correct: running production across two or more public cloud providers at once to avoid dependence on any single vendor is a multi-cloud strategy, and it needs no private cloud tier.

Why B is wrong: Hybrid cloud is tempting because more than one environment is in play, but hybrid requires a private cloud combined with public cloud, and the organisation here operates no private cloud.

Why C is wrong: Community cloud is tempting because multiple parties appear involved, but it is a single shared platform for organisations with common concerns, not one organisation using two providers.

Why D is wrong: Private cloud is tempting as a familiar term, but no dedicated single-tenant infrastructure is described, since every service runs on public cloud providers.

See more N10-009 practice questions, answers explained.

Exam traps in Networking Concepts

Answers that look right on this material and are not. Each one is a distractor from a different question in the N10-009 bank for this domain.

Community cloud
Why it is wrong: Community cloud is tempting because it also spans more than one party, but it describes several organisations sharing one platform for common concerns, not a single organisation joining a private estate to public capacity.
Public cloud
Why it is wrong: Public cloud is tempting because it is also multi-tenant, but it is open to any paying customer rather than restricted to a defined set of organisations with shared requirements.
Extending the MPLS circuit's committed information rate so that more cloud traffic fits within the existing backhaul path.
Why it is wrong: Raising the CIR adds bandwidth and feels like the obvious fix, but it keeps the traffic hairpinning through the data centre and simply pays a carrier for a longer path that SD-WAN can avoid.

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