The IOS is copied from flash memory to volatile RAM.You can store several versions of IOS images.But it can be modified or configured as required.It is a non volatile storage, which mean that the information is not lost in case of power shutdown.The Cisco IOS image is stored in flash-memory, this means the following: Configuration of different protocol on Cisco devices.

You can perform and enable different networking function using these Cisco IOS images, some of these are as following. In GUI mode, you have graphic interface which allows the user to interact with the system in a much better and easy way. CLI is the basic text-based environment, where you can configure your Cisco device by using different commands. Users can interact with Cisco hardware through the command line interface (CLI) or the graphical user interface (GUI).

By default every Cisco device have a installed IOS images but you can change and reinstall the new version IOS anytime.

With new GNS3 you have IOU and GNS3 appliances available for different virtual networking labs.Ĭisco IOS image is a collection of network operating functions and systems used in Cisco network appliances and these IOS images allow the users to interact with the hardware of Cisco devices. These are the working Cisco IOS images, which are tested and verified with the latest version of Gns3. In this article i will share you the list of NEW Cisco IOS Images which are available for download.

Gns3 switch ios images free download