Which of the following involves installing an application on a server so several users can run the application concurrently without the need for local installation?

Client virtualization, particularly application virtualization or virtual desktop infrastructure (VDI), allows applications or entire desktop environments to be hosted on a central server and delivered to multiple users. This means users can run the application remotely without local installation, often through a thin client or browser.

Software as a Service (SaaS) is a cloud computing model where applications are hosted by a third-party vendor and made available to customers over the internet, which focuses on the delivery model rather than the underlying virtualization technology enabling concurrent access without local install.

Sandboxing is a security mechanism to isolate running programs from the rest of the system, not a method for centralizing application access for multiple users.

Embedded software is specialized software integrated into hardware devices to control their specific functions, unrelated to providing multi-user access to applications on a server.