C3620-a3jk8s-mz.122-26c.image

This specific image is frequently cited in educational contexts for building network labs:

You need to pick:

: The feature set included in the image. "A3" typically refers to the main feature set, while "JK8S" indicates support for specific encryption and advanced features. c3620-a3jk8s-mz.122-26c.image

: The hardware platform it is built for (Cisco 3620 Series Router).

: Indicates the image runs from RAM ( m ) and is compressed ( z ). 122-26c : The software version (IOS Version 12.2(26)c). .image : The file extension used for these firmware files. Common Uses in Networking This specific image is frequently cited in educational

Cisco's naming convention provides a wealth of information about the capabilities of the software: How to configure Dynamic NAT on Cisco IOS Router - Page 3

c2600-ipbasek9-mz.124-25c.image c3620-advipservicesk9-mz.124-16.bin c7200-a3jk8s-mz.122-26c.image c2800nm-advsecurityk9-mz.124-24.bin : Indicates the image runs from RAM (

c3620-a3jk8s-mz.122-26c.image

In the Cisco world, "GD" means the software has been tested extensively and is considered stable for widespread use in production networks.