This image is a virtualized version of the Cisco IOS (Internetwork Operating System) designed to run natively on a Linux platform. The name itself provides a breakdown of its capabilities:

If you are a network engineer or a student preparing for certifications like the CCNA or CCNP, you have likely encountered the filename . This specific file is a Cisco IOS on Linux (IOU) image, frequently used in virtual lab environments like GNS3 and EVE-NG . What is this image?

: Specifies that this is a Layer 2 image, meaning it emulates a Cisco switch.