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Here is an example of an ed2k link: ed2k://|file|overnet0.50.1.exe|1225593|9aceac18177fc86d18be5e1c19750408| eDonkey network (also called eDonkey2000 network or ed2k) is a file sharing network used primarily to exchange music, films and software. ... eDonkey2000 is a peer-to-peer file sharing application developed by MetaMachine, using the Multisource File Transfer Protocol. ... ed2k links are used by the eDonkey2000 family of P2P programs, such as eDonkey2000 itself, eMule, Hybrid, MLDonkey, and others. ... A hash function or hash algorithm is a function for summarizing or probabilistically identifying data. ... MD4 is a message digest algorithm (the fourth in a series) designed by Professor Ronald Rivest of MIT in 1990. ...
The ed2k link format: ed2k://|file|fileName|fileSize|fileHash|(optional params)|(optional params)|etc|
ED2K is a protocol originally used by the P2P (Peer-to-Peer) client eDonkey2000, which is where the name comes from.
The ED2K network is server based like many other P2P networks such as Kazaa (Kazaa is server based, but hides the server connection from the user), which means that the first thing you do when you run aMule is to connect to a server (either manually or automatically).
This way different chunks get spread around the ED2K network, so that, although no-one may have at a same given moment the complete file, it may be completed by downloading the different chunks from different people (it is well known that users tend to stop sharing a file once it has been completed).