Another name for a wall plate. For example, a network administrator might say, «This room has 24 drops, and 6 are still available». This means that there are 24 wall plate connections on the walls of the room, and 18 of them have drop cables attached to them to connect them to computers in the room.
The other end of the drops usually terminates at a patch panel in the wiring closet. Another name for a drop is a «LAN Drop».