A datacenter systems administrator needs to install a new server within an existing rack. Which of the following components would the systems administrator need to physically install the server in…

A rail kit provides the sliding rails, brackets, and mounting hardware used to physically secure and seat a server chassis inside a standard rack enclosure, making it a mandatory component for the physical installation.

Cable management accessories organize and route existing cables neatly but are not required components to physically mount and seat a new server in a rack.

A UPS provides battery backup power to the rack as a whole and is not a component needed specifically to install a single server into a rack slot.

A network switch aggregates network connections for multiple devices but is not a component required to physically install an individual server into a rack.

Fiber cables connect the server to storage area networks or high-speed network infrastructure, completing the physical installation by establishing the data paths the server requires to operate within the datacenter.

A KVM switch allows sharing of keyboard, video, and mouse across multiple servers but is not required as part of the physical rack installation process for a new server.