Which of the following will allow devices to be added without turning the server off?

Plug and Play is an operating system feature for automatic hardware detection and configuration, but it does not inherently mean devices can be added or removed while the system is running.

A warm site is a disaster recovery term referring to an alternate site that is partially equipped and requires some setup to become operational.

Hot plug (also known as hot-swappable) describes the capability of a hardware component or system to allow installation or removal of devices, such as hard drives, power supplies, or fans, without powering down the host system. This feature is crucial for maintaining server uptime and availability during maintenance or upgrades.

A hot site is a disaster recovery term referring to an alternate site that is fully equipped and ready for immediate operation.