The term used to define network cabling between IDF (Intermediate Distribution Frame) and MDF (Main Distribution Frame) is "backbone cabling."
Backbone cabling refers to the cabling infrastructure that connects various telecommunications rooms or equipment rooms within a building or campus. It provides the pathway for data transmission between the IDF, which serves as a central distribution point for network connections on a floor or within a specific area. It also serves as the main hub or central distribution point for the entire building or campus.
The backbone cabling typically consists of high-capacity cables, such as fiber optic cables or high-grade copper cables, capable of handling large amounts of data traffic. It is designed to provide reliable and high-speed connectivity between different network components and support the overall network infrastructure.