I86bi-linux-l3-adventerprisek9-15.4.2t.bin -

This is the or "license" designation. This is arguably the most important part of the filename for the end-user.

The file i86bi-linux-l3-adventerprisek9-15.4.2t.bin is a Cisco IOSv (IOS for Virtual) software image. It is designed to run as a Linux process (not as a standalone hypervisor image) and is intended for deployment in virtualized environments such as VMware ESXi, KVM, GNS3, or EVE-NG. This specific version is based on IOS release , carries the adventerprisek9 feature set, and supports Layer 3 (L3) routing functionality. i86bi-linux-l3-adventerprisek9-15.4.2t.bin

This image is for physical Cisco hardware. It is intended for: This is the or "license" designation

To use the i86bi-linux-l3-adventerprisek9-15.4.2t.bin image, you are setting up a carries the adventerprisek9 feature set