![]() All processes have direct hardware access to save CPU processing time. What is the architecture of Cisco iOS?ĭue to the hardware resources of routers and switches in the 1980s, Cisco IOS has a monolithic architecture. Also, there is no third-party or trick to download Cisco on IOS devices. ASA security devices, which run a Linux-derived operating system, carrier routers that run IOS-XR, and Cisco’s Nexus switch and FC switch products that run Cisco NX-OS are notable exceptions. Keep in mind that not all Cisco products support iOS. Even though the IOS codebase includes a cooperative multitasking kernel, most IOS capabilities have to get ported to other kernels for usage in Cisco products, including QNX and Linux.Ĭisco’s Internetwork Operating System (IOS) is a network operating system that runs on various Cisco routers and switches. IOS is a multitasking operating system that combines routing, switching, internetworking, and telecommunications operations.
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