Bit Torrent Nirav A. Vasa. Topics What is BitTorrent? Related Terms How BitTorrent works Steps involved in the working Advantages and Disadvantages.

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Presentation transcript:

Bit Torrent Nirav A. Vasa

Topics What is BitTorrent? Related Terms How BitTorrent works Steps involved in the working Advantages and Disadvantages

What is Bit torrent BitTorrent is a peer-to-peer file sharing (P2P) communications protocol. The protocol was designed by Bram Cohen in April There are numerous compatible BitTorrent clients which run on a variety of computing platform.

Related terms Seed or seeder - A computer with a complete copy of a BitTorrent file. Leeches - People who download files but do not share files on their own computer with others. Swarm - A group of computers simultaneously sending (uploading) or receiving (downloading) the same file.

Related terms.torrent - A pointer file that directs your computer to the file you want to download. Tracker - A server that manages the BitTorrent file-transfer process.

File sharing models Traditional client server model Peer-to-peer File Sharing BitTorrent is a peer-to-peer file sharing model which follows certain rules in its protocol. 1.It offloads some of the file tracking work to the central server called as the tracker. 2.It uses the principle of tit-for-tat. 3.It downloads using the rarest first policy to ensure high availability.

How does it work ??? The file to be downloaded broken up into identically sized pieces with a checksum on each. Any torrent client uses the.torrent file to locate the tracker and the tracker gives the information of the availability of the file pieces. The client downloads the file pieces from the respective peers and in turn also uploads the pieces it has to those peers.

How does it work ???

Steps involved

Download the torrent file Contact the Tracker Tracker Response Peer Connection Peer A downloads a piece from the network Piece exchange starts Peers periodically contact tracker

Advantages BitTorrent is remarkably robust and scalable. It performs very well in terms of handling the transfer of large files. While downloading, the peer also simultaneously uploads the file pieces which distributes the bandwidth usage among all the peers rather than downloading from a single server

Disadvantages It can be used for the exchange of illegal files (music, videos etc.) over the internet. Download rate depends upon the popularity of the file shared.

Thank You