A company wants to move its data from on premises to off premises. Which of the following cloud models should be pursued?

XaaS (Anything as a Service) is a broad category encompassing various cloud services, not a specific model for moving existing data.

SaaS (Software as a Service) delivers ready-to-use applications over the internet, with the provider managing the underlying infrastructure and software, which is not suitable if the company wants to control its own data migration and stack.

PaaS (Platform as a Service) provides a platform for developing, running, and managing applications without the complexity of building and maintaining the infrastructure typically associated with IaaS. It's more about application development than raw data migration where the customer retains OS/application control.

Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines, storage, networks, and operating systems. When a company wants to move its data off-premises while still maintaining significant control over the operating systems and applications, IaaS is the appropriate cloud model.