What is Cloud Service Model IaaS?

The correct answer describes Infrastructure as a Service (IaaS) as a model that provides virtualized computing resources over the internet. In this model, users can access essential resources such as virtual machines, storage, and networks without needing to own or manage the physical hardware. This allows businesses and developers to quickly scale their infrastructure according to their needs, making it a flexible and cost-effective solution.

IaaS is an integral part of cloud computing that allows organizations to deploy and manage their applications and services efficiently while relying on the provider's infrastructure. By using IaaS, users can provision resources dynamically, based on demand, which can lead to enhanced performance and reduced costs.

Other choices represent different aspects of cloud computing but do not accurately define IaaS. For instance, the option that mentions a platform for developing software applications refers more broadly to Platform as a Service (PaaS), another cloud service model. Network management software focuses on managing and monitoring networks rather than offering infrastructure. Lastly, services specifically tailored to security would fit under a different category known as Security as a Service (SecaaS).