Cisco IOS Software Release 12.0(7)XK is a short-lived release and does not provide maintenance releases. If needed, software rebuilds will use the following naming convention: Cisco IOS Software Release 12.0(7)XK1, 12.0(7)XK2, and so on. Depending on the router that the IOS is running on, the version change will support various additional ports and configurations. Hope this helps.
