What is IPKVM/KVM, what it's used for?

IP KVM

IP KVM (OOBM) access technology extends keyboard, video, and mouse signals from any computer or server via internet connection. Through this connection, remote users can access and control a server from wherever they are.

In addition, IP KVM enables a user to issue power commands as well as attach images to boot or install an operating system on the given server(s).