Cisco IOS is the standard operating system for all Cisco routers. It is a deeply feature-rich, yet efficient, routing-centric OS. Aside from creating the router industry, what has made Cisco so popular among network managers and administrators is its solid implementation of standard and proprietary routing protocols and its reliability and security enhancements. Cisco IOS is the standard by which other routing implementations are measured in terms of protocol implementation stability, IETF (RFCs), IEEE, and ANSI hardware and software standards implementations.
The IOS interface was based on the TOPS-20 command shell interface, which was a user-centric, help-oriented shell. The IOS command interface is now widely emulated on a variety ...
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