Final answer:
The cloud computing delivery model where clients purchase resources as an outsourced service is known as IaaS (Infrastructure As A Service). IaaS allows clients to access infrastructure like servers and storage through the internet on a pay-per-use basis. This service enables businesses to save on the costs of owning and managing physical servers.
Step-by-step explanation:
The answer to the question, which cloud computing delivery model involves purchasing computing resources as an outsourced service from suppliers who own and maintain all the necessary equipment and software, is IaaS (Infrastructure As A Service). In the IaaS model, clients use the internet to access and operate infrastructure like networks, storage, and servers, which are owned and managed by the provider. IaaS allows businesses to avoid the capital expenditure and complexity of buying and managing their own physical servers and other datacenter infrastructure. The client typically pays on a per-use basis. Each model provides different levels of control, flexibility, and management, adapting to the specific needs of different types of businesses.