Video encyclopedia

Cisco IOS


Operating Cisco IOS Software


CISCO IOS Installation


Cisco IOS CLI for beginners - Part 1


How well do you know Cisco IOS?


Cisco Internetwork Operating System (IOS)

Cisco IOS is a family of software used on most Cisco Systems routers and current Cisco network switches. (Earlier switches ran CatOS.) IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. Although the IOS code base includes a cooperative multitasking kernel, most IOS features have been ported to other kernels such as QNX and Linux for use in Cisco products or simulators such as Cisco VIRL.
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    • History 

    • Command-line interface 

    • Architecture 

    • Routing 

    • Packages and feature sets 

    • Versioning 

    • Security and vulnerabilities 

    • IOS XR train