![]() ![]() There are two main versions of SSH: SSH-1 and SSH-2. SSH is so popular that, like Google, it is often used as a verb, for example SSH-ing. SSH protocols cover authentication, encryption, and data integrity. SSH is used to secure, configure, manage, maintain, and operate network servers, routers, firewalls, switches, operating systems, and applications. SSH manages more than half the world’s web servers, on-premise and in the cloud. SSH itself is not a shell, like the Unix Bourne shell or C shell instead, it creates a channel for running a shell on a remote computer. An example of another commonly used shell is Windows Command Prompt (cmd.exe), which provides access to Windows operating system tools. Over time, the term has been increasingly applied to the user interfaces of servers that make them more user friendly to interact with. ![]() ![]() Originally, the word shell in SSH referred to a program that processed Unix commands. Communications between a client and server using SSH are encrypted, so it is ideal for use on unsecure networks. SSH protocols specify standards for operating network services securely between untrusted hosts over unsecured networks. While it is often referred to as a version of SSH, it is, strictly speaking, a suite that consists of networking utilities that are based on the SSH protocol. ![]() It is a generic term that refers to versions of SSH protocols, for example SSH-1 and SSH-2, among other things like OpenSSH. ![]()
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