A rapidly growing company wants to use a cloud service to provide all of its employees with access to a specific program. The company wants employees to be able to access the program via the internet without having to install any applications on individual devices. Which cloud service model should be used?

FaaS is a cloud computing model that allows developers to execute code in response to events without managing servers. While it facilitates certain applications, it is primarily focused on backend processes and does not provide a complete software solution accessible to end users, as required by the company.

PaaS offers a platform allowing developers to build, deploy, and manage applications. However, it focuses on providing development tools rather than end-user software access. This means that while it supports application development, it does not meet the company's need for direct employee access to a specific program.

IaaS provides virtualized computing resources over the internet, such as servers and storage. While it offers significant flexibility for running applications, it requires users to manage the software stack themselves, which conflicts with the company's requirement to provide easy access to a specific program without installations.