A technical lead wants to migrate all common business applications, including email and fileshares, to the cloud. Which of the following cloud concepts should be used?

MaaS, or Mobility as a Service, focuses on transportation services and not on common business applications. It is related to the integration of various forms of transport services into a single accessible on-demand service, thus making it irrelevant for migrating applications like email and fileshares.

PaaS, or Platform as a Service, provides a platform for developers to build, deploy, and manage applications. While it offers tools for application development, it does not deliver ready-to-use business applications like email or file sharing, making it less suitable for the migration of those specific services.

IaaS, or Infrastructure as a Service, provides virtualized computing resources over the internet, allowing businesses to manage their infrastructure. While IaaS can support applications, it requires more management and setup than SaaS, which directly offers the applications needed, making it less efficient for migrating typical business applications.