User:CBaker007/Cisco 2800 Series Router

Operating System
Cisco modular access routers and most of their high end routers (7000 series and above) run Cisco's proprietary operating system called the Cisco Internetwork Operating System (aka - Cisco IOS).

The Cisco IOS is sold in various versions called "Feature Sets". The base version is typically the "IP Base" version which supports basic IP routing features. Other versions include support for routing other protocols, voice features, etc. The exact Feature Set needed can be determined using Cisco's Feature Navigator.

The IOS is typically a single file installed on the router's flash memory that is dynamically expanded on bootup. The IOS file is hardware specific. In other words an "IP Base" IOS image for a 2800 series router will not run on a 1600 series router.