Final answer:
In BitTorrent, a tracker is a server that facilitates communication between peers. A torrent is a small file that contains information about the files being shared.
Step-by-step explanation:
In the context of BitTorrent (BT), a tracker is a server that helps facilitate the communication between peers in a torrent file. It keeps track of the availability and status of the different parts or pieces of a file being shared.
A torrent refers to a small file that contains information about the file or files being shared in a BitTorrent network. It includes details like the file name, size, and the hashes of the file pieces. When a user opens a torrent file, the BitTorrent client connects to the tracker to find peers and start downloading or uploading the file.