The document provides an overview of BitTorrent technology, focusing on its protocol and software used for peer-to-peer file sharing. It explains the roles of clients, peers, seeders, and leechers in the file transfer process, and discusses how files are downloaded through a decentralized network. Additionally, it highlights the legal implications of downloading copyrighted content and warns against using torrents for illegal downloads.

1. BitTorrent™ Technology
How and Why it works
Akshay K Sajan
Final year Hardware Eng.
akshaysajan17@gmail.com

2. Definition of BitTorrent™
The word BitTorrent could refer to three
things; BitTorrent as a company, protocol, and
software. This presentation will only discuss
the following:
Protocol
Software

3. The BitTorrent Protocol

4. What is BitTorrent Protocol ?
P2P(Peer To Peer) file transfer protocol
Transfer of large files
Files are shared by many users
Active participation of all users
Huge success in file sharing domain since 2003
Created by Bram Cohen in April 2001, released
July 2001

5. Definitions
 Client
 Peer
 Seed
 Leecher
 Tracker

6. Client
A BitTorrent client is any program that implements the
BitTorrent protocol. Each client is capable of preparing,
requesting, and transmitting any type of computer file over a
network, using the protocol.

7. Peer
These are the clients who are
responsible for the file transfer.
Peers = leechers + seeds.
Downloading speed of any file using
torrent depends on number of peers.

8. Seeder
Someone who has finished downloading
and is only uploading

9. Leecher
Someone who is downloading

10. Tracker
A BitTorrent tracker, for those of you that don't
remember, is a server that regulates the communication
between those downloading and uploading torrents.

11. General Idea of BitTorrent
 File is broken in to many different pieces
 Each piece is downloaded in a “rarest” first
order
 As peers get more pieces they seed those
until 100% - then they become a seed

12. Traditional vs. Bittorrent
.
 One server provides
many clients
.
 Many clients provide
many clients

13. .

14. How does it work?

15. 1 2 3 4 5 6 7 8 9 10 11 12 13
1 2 3 4 5 6 7 8
1 2 3 4
Client A
Client B
Client C
Client D 1 2 3 4
9 10 11 12 13
6 7 8 9 10 11 12 135
5 6 7 8 9 10 11 12 13
Client E
.

16. 1 2 3 4 5 6 7 8 9 10 11 12 13
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3 4
9 10 11 12 13
6 7 8 9 10 11 12 135
5 6 7 8 9 10 11 12 13
1 2 3 4 5 6 7 8 9 10 11 12 13
.Client A
Client B
Client C
Client D
Client E

17. What is a torrent file ? (“ .torrent “ )
 Torrent file is a computer file that contains details about
files and folders that can be downloaded from the torrent
network .
 A torrent file is opend with only a torrent client .

19. The BitTorrent Software ( Client )
 .

24. Clients  .

25. Torrent Sites

27. .
 .
Efficient
Low Bandwidth
Large Size
Client is
simple
World wide file
transfer capabilitese
Free 100%
Linux Distribution
No server down

28. . .
Copyright
content
distribution
Needs more
processing
No streaming
capabilities
Chance for virus
attaks
Pornography Piece missing

30. Killing is illegal ; Knives are not .
 Shortly, yes if you are downloading commercial content.
For example, say if you download “ google chrome “ via
torrent, you are not doing anything illegal.
 Imagine you are downloading also an another commercial
content. For example “ A Malayalam movie released in 2015
“ via torrent, you are doing something illegal.

32. PLEASE AVOID
DOWNLOADING
PIRATED(COPYRIGHTED)
TORRENTS.
WARNING

34. Thank You

35.  .
Do you have any Questions ???
Akshay K Sajan
Final year Hardware Engineering
akshaysajan17@gmail.com