Service Models and Shared Responsibility
Cloud+ architecture starts with IaaS, PaaS, SaaS, FaaS, shared responsibility, workload placement, service dependencies, and business requirements.
How to study for CompTIA Cloud+
Treat each Cloud+ item as an operations decision: identify the service layer, ownership boundary, requirement, risk, control, and validation step.
Core concepts
Concept 1
Cloud service models shift operational responsibilities between provider and customer.
Exam cue: Identify which party controls the failing layer.
Concept 2
Shared responsibility changes across compute, platform, application, identity, data, and network layers.
Exam cue: Match service model to operational responsibility.
Concept 3
Workload placement should match availability, cost, security, compliance, and operational skill requirements.
Exam cue: Tie architecture choices to business and technical requirements.
Risk pitfalls and guardrails
Assuming the cloud provider handles customer data classification and access decisions.
Guardrail: Avoid answers that skip telemetry, over-permission identities, ignore cost or compliance, disable controls broadly, or deploy without rollback.
Choosing a service model without considering operations skills.
Guardrail: Avoid answers that skip telemetry, over-permission identities, ignore cost or compliance, disable controls broadly, or deploy without rollback.
Treating SaaS, PaaS, IaaS, and FaaS as interchangeable.
Guardrail: Avoid answers that skip telemetry, over-permission identities, ignore cost or compliance, disable controls broadly, or deploy without rollback.
Memory anchors
IaaS
Infrastructure as a service gives customers control over operating systems and workloads while the provider runs underlying infrastructure.
PaaS
Platform as a service reduces infrastructure management while customers still own application code and data choices.
SaaS
Software as a service delivers a complete application while customers manage identity, data use, and configuration.
FaaS
Function as a service runs event-driven code without managing long-lived servers.
Shared Responsibility
Shared responsibility identifies which security and operations tasks belong to the provider or customer.
Workload Placement
Workload placement chooses cloud services based on performance, cost, compliance, availability, and operations needs.
Cloud Region
A cloud region provides a geographic boundary for latency, availability, compliance, and resiliency decisions.
Availability Zone
An availability zone isolates failures within a region for resilient architecture.
Service Dependency
A service dependency must be included in availability, security, and recovery planning.
Business Requirement
Business requirements convert goals such as uptime, cost, and compliance into architecture constraints.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
A company needs virtual machines whose operating systems can run a custom kernel module. The cloud provider should manage the physical hosts, but the company must control guest patching. Which service model fits BEST?
Developers want to deploy a web application while the provider patches the operating system, maintains the language runtime, and scales the platform. Which model should the architect select?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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