Cisco Networking Software (Cisco IOS, Cisco IOS XE, Cisco IOS XR, and Cisco NX-OS) is the world's most widely deployed networking software. It integrates cutting-edge technology, …

In 2005 Cisco introduced the Cisco IOS XR network operating system on the 12000 series of network routers, extending the microkernel architecture from the CRS-1 routers to Cisco's …

Nov 21, 2023 · Cisco IOS (Internetwork Operating System) is a collection of proprietary operating systems (OSes) that run on Cisco Systems hardware, including routers, switches and other …

Dec 1, 2025 · Initially, Cisco developed IOS for its routers. Later, it redesigned it to work on other devices such as switches and firewalls. Currently, it works on all supported Cisco devices. IOS …

IOS enables routing, switching, internetworking, and a variety of telecommunications functions on a whole series of Cisco network device platforms.

This article describes the Cisco IOS fundamentals, such as how to access IOS and what IOS modes are available.

Nov 19, 2024 · Learn how to legally obtain, download, and install Cisco IOS software on a Cisco device without hassles. Cisco IOS, or Internetwork Operating System, is a proprietary …