In networking, MDF and IDF stand for Main Distribution Frame and Intermediate Distribution Frame, respectively. MDF is the primary hub or demarcation point that interconnects private or public IT and telecommunication lines coming into a building to an internal network via any number of IDFs which cross connect from the MDF to remote workstation devices. The MDF acts as the central termination point for incoming data lines, while the IDF ensures localized distribution to specific areas. The MDF is usually located in the center of the network and contains centralized equipment such as file servers and web servers. On the other hand, the IDF is an extension of the MDF and is usually located on each floor of a building, routing the cabling through the walls to the MDF on the first floor. The IDF is a place where users can be connected into the main network, and it usually has switches for a floor or workgroup. The IDF is commonly seen in medium- to large-scale environments where users are separated by geography. The MDF and IDF are connected via fiber optic cables for greater length and faster speeds.