When IOS was developed, Cisco Systems' main product line were routers. Through modular extensions IOS has been adapted to increasing hardware capabilities and new networking protocols. The IOS network operating system was developed in the 1980s for routers that had only 256 kB memory and low CPU processing power. Notable exceptions include ASA security products, which run a Linux-derived operating system, carrier routers which run IOS-XR and Cisco's Nexus switch and FC switch products which run Cisco NX-OS. 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. IOS is a package of routing, switching, internetworking and telecommunications functions integrated into a multitasking operating system. ( February 2015) ( Learn how and when to remove this template message)ġ5.9(3)M / August 15, 2019 2 years ago ( )Ĭisco Internetwork Operating System ( IOS) is a family of network operating systems used on many Cisco Systems routers and current Cisco network switches. Please help to improve this article by introducing more precise citations. This article includes a list of general references, but it remains largely unverified because it lacks sufficient corresponding inline citations.
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