220-1101 Virtualization and Cloud Computing Practice Question
A company wants to migrate its on-premises email system to the cloud. The IT team wants to avoid managing the underlying server hardware and email software, but they require the ability to configure custom email policies, create user accounts, and manage distribution groups. Which cloud service model best meets these requirements?
⚠ Common exam trap
CompTIA often tests the misconception that PaaS is for any hosted application, but PaaS is a development platform, not a pre-built application like email; candidates confuse the ability to configure policies with the need to build the application itself.
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
✓
Software as a Service (SaaS)
Software as a Service (SaaS) delivers a fully managed email application (e.g., Microsoft 365 Exchange Online) where the provider handles all underlying hardware, OS, and email software. The customer retains administrative control to configure custom email policies, create user accounts, and manage distribution groups via a web console or PowerShell, without any server or software maintenance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Infrastructure as a Service (IaaS)
Why it's wrong here
IaaS supplies raw compute, storage, and networking as metered virtualized resources, but the customer remains responsible for deploying and patching the guest OS, installing the mail server software (e.g., Exchange or Postfix), configuring DNS and certificates, and handling availability. This model squarely contradicts a goal of offloading software management, since the IT team would still own the full email stack atop the infrastructure.
- ✗
Platform as a Service (PaaS)
Why it's wrong here
PaaS abstracts away the OS and runtime for custom application development, offering services like databases, queues, and autoscaling for code you write and deploy. A hosted email system is a prebuilt, packaged application, not a custom codebase, so using PaaS would require the team to build, secure, and operate an email server from scratch—defeating the intent of moving to a managed cloud service.
- ✓
Software as a Service (SaaS)
Why this is correct
SaaS is a fully managed application delivered over the internet, where the provider owns the physical hardware, operating system, email engine, patches, and durability, and the customer only manages user mailboxes, aliases, retention policies, and client access. This is the only option that lets the organization avoid all software and infrastructure administration while still controlling email-specific configurations, making it the correct fit for the migration goal.
- ✗
On-premises deployment
Why it's wrong here
Keeping email on premises means the organization must purchase servers, storage, and network gear, maintain the operating system and mail software, apply security updates, and ensure high availability and disaster recovery—all with internal staff. That model maximizes administrative overhead and directly contradicts the requirement to avoid managing infrastructure and software, so it cannot be the chosen direction for the cloud migration.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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