Final answer:
SaaS (Software as a Service) provides the least burden on the customer among IaaS, PaaS, and SaaS. In this model, the provider takes care of server maintenance, security updates, and software installation.
Step-by-step explanation:
The least burden on the customer among IaaS, PaaS, and SaaS is SaaS (Software as a Service).
SaaS is a cloud computing model where the provider hosts and delivers software applications over the internet. In this model, the customer doesn't have to worry about server maintenance, security updates, or software installation. The provider takes care of all these aspects, making it the least burdensome option for the customer.
On the other hand, IaaS (Infrastructure as a Service) provides virtualized computing resources, such as virtual machines and storage, to the customer. The customer is responsible for managing the operating system, middleware, and applications. This requires more technical knowledge and effort compared to SaaS.
PaaS (Platform as a Service) is an intermediate option between IaaS and SaaS. It provides a platform on which customers can develop, run, and manage applications without worrying about infrastructure management. While PaaS reduces some burden in terms of infrastructure, it still requires customers to handle the development and deployment of applications.