An administrator needs to control servers locally via a console. The administrator wants a rack mounted solution for easy access. Which of the following should be installed?

iDRAC is Dell's proprietary remote out-of-band management controller embedded in the server itself, not a separate rack-mounted local console device.

A KVM (Keyboard, Video, Mouse) switch is a physical device designed to be installed in a server rack, consolidating local console access to multiple servers in a single 1U or 2U unit. It allows an on-site administrator to switch between servers directly without requiring network connectivity or a running OS. This makes it the correct rack-mounted local console solution described in the question.

iLO is HP's Integrated Lights-Out remote management controller, which is embedded in HP/HPE servers and used for remote access, not local rack-mounted console switching.

RDP is a software-based remote desktop protocol that operates over a network and requires an active OS and network connection, not a physical rack-mounted console solution.