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SSH stands for Secure SHell. It is a network protocol (set of rules for transfer of data) for connection between two computers over a network of some kind. It's technology is based on a public key (where a public key and a private key mathematically relate somehow to form an unlocking of data) cryptography. It is most commonly used for logging onto a server or another computer from a distance(remotely over a network) to execute commands.

The protocol has 3 main layers. The transport layer, the user authentication layer and the connection layer. All layers have different jobs in making the protocol work the way it does.

For more detailed information on SSH you could see the following websites

http://www.answers.com /ssh?cat=technology
http://en.w ikipedia.org/wiki/Secure_Shell

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