Certificate of Cloud Security Knowledge (CCSK) Practice Test 2025 - Free CCSK Practice Questions and Study Guide

The primary service models in cloud computing are Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). Each of these models provides different levels of abstraction and service to users, enabling them to build, host, and manage applications without needing to worry about underlying infrastructure.

IaaS allows users to rent virtualized computing resources over the internet, providing significant control over hardware components while managing operating systems, applications, and storage. PaaS offers a platform allowing developers to build, deploy, and manage applications without dealing with the complexities of the underlying infrastructure. SaaS delivers software applications over the internet on a subscription basis, enabling users to access applications without the need for local installation.

Network as a Service (NaaS), while a valid model in cloud computing, is considered more of a secondary service model and is not classified among the primary service models like IaaS, PaaS, and SaaS. NaaS focuses on network services and capabilities rather than the broader computing or application services covered under the primary models. Therefore, NaaS does not share the same level of foundational characteristics that define the three primary service models in cloud computing.