A torrent file is composed of several pieces of a fixed length. Each piece is the same length (except for the last, which may be cut off). Each piece is then subdivided into multiple chunks of the same size, each containing a SHA1 hash of the piece at its corresponding index. The first two pieces are always the same size; chunks larger than two are not. BitTorrent uses a default length of 2 20 = 1 M.
Each peer receives a file from the seed and then downloads a piece. The other peers then download pieces from the seed. A torrent cannot function without seeds, however, and tracker Web sites encourage seeding and punish peers who fail to do so. The process works by using a network of computers, known as a swarm. Typically, hundreds of peers are involved. In addition to peers, a torrent can also be downloaded if one of them is a seed.
The biggest immediate benefit of BitTorrent is for content providers who want to make big files freely available to the public. BitTorrent drastically lowers the costs of publishing these files online. Content providers can afford to make a wider range of files available to the public, which benefits the community as a whole. BitTorrent helps to reduce the cost for both content providers and users, and it has become increasingly popular among content lovers. Therefore, many users are now converting from traditional download methods to BitTorrent.
To download a file from a torrent, you need to install a BitTorrent client. This program will open the torrent file and connect to the tracker or seed. BitTorrent clients can optimize their upload and download rates. The network is composed of hundreds of peers, each of which shares a specific part of a file. It is very easy to download a torrent using BitTorrent. These servers are usually standard personal computers. Moreover, anyone who downloads a single part of a torrent can operate as a server.
The BitTorrent network is a worldwide network of peers who are connected to each other via a tracker. Users connected to the network are called peers. They fall into two categories: leech users, who download the file from other peers who already have it, and seeds. Seed users, on the other hand, allow other users to download the file. Depending on the version of the BitTorrent protocol, a seed can have ten times more peers than a leech.
To start downloading a torrent, you need to download the tracker first. BitTorrent trackers return a compact list of peers. Tracker extensions must coordinate with Bram Cohen and be compatible with each other. BitTorrent’s peer protocol operates over TCP or uTP, and its connections are symmetric. This means that data can flow in either direction. However, when a torrent client is downloaded, it does not stop until the download is finished.