Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet such as servers, storage, and networking. It allows a business to quickly spin up virtual machines and is ideal for disaster recovery and scalable IT infrastructure needs.
Option B: SecaaS focuses on cloud-delivered security, not infrastructure.
Option C: PaaS offers development environments, not full virtual infrastructure.
Option D: SaaS delivers applications over the internet (e.g., email, CRM) — not for disaster recovery.
CompTIA A+ Core 1 Exam Objective Reference:
Objective 4.1: Compare and contrast cloud computing concepts.
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