I86bi-linux-l3-adventerprisek9-15.4.1t.bin ((full)) 100%

: This is the IOS version. The "15.4" series is a stable, modern release, while the "T" (Technology) train signifies that it includes the latest features and hardware support available at its time of release. bin : The file extension for a binary executable file. Why Use i86bi-linux-l3-adventerprisek9-15.4.1t.bin?

conf t interface gigabitethernet 0/0 mpls ip i86bi-linux-l3-adventerprisek9-15.4.1t.bin

In short, this is a Linux-native, Layer 3 routing image with full enterprise encryption and routing protocols, based on IOS version 15.4(1)T. : This is the IOS version