Cisco IOS

Cisco defines Cisco IOS as “the world's leading network infrastructure software,” contending that, by delivering a seamless integration of platform support and business services, this operating system is a versatile resource for diverse types of networking. Cisco also calls IOS as the most widely used software of its kind anywhere in the world.

In general, Cisco IOS represents a modern operating system for handling network hardware for a household name in advanced networking technology. Cisco IOS also features an easy syntax such as "show, copy, config and debug" commands and the use of a question mark (“?”) to access help features.