Which cloud computing service involves client companies renting the use of software from providers and client's users accessing the software over the internet?

The correct answer is Software as a Service (SaaS), which involves client companies renting software applications from service providers. In this model, the software is hosted in the cloud and is accessed by users over the internet, enabling them to utilize the software without the need to install or maintain it on individual computers.

This approach offers several benefits, including lower costs for clients, as they do not need to invest in the infrastructure required to support the software. SaaS solutions are typically subscription-based, providing flexibility for companies to scale their usage based on current needs. Additionally, software updates and maintenance are managed by the provider, ensuring that users always have access to the latest features and security improvements.

Other cloud computing service models such as Infrastructure as a Service (IaaS) and Platform as a Service (PaaS) serve different purposes. IaaS provides virtualized computing resources over the internet, allowing clients to manage and control their own applications, storage, and networking. PaaS offers a framework for developers to build and deploy applications without worrying about the underlying hardware and software infrastructure.

Network as a Service (NaaS) typically involves the provision of network services, such as connectivity, without focusing on specific software applications. In contrast, SaaS