You can operate ATHENA 2021 as a single license or as a network license.

If you want to operate ATHENA as a single license, you need a hardware protection plug (hardware lock) for each workstation.

If you wish to operate ATHENA 2021 as a network license (floating license), you need a hardware protection plug for the server (here you must also install a license manager).

Hardware protection plugs are only available for USB slots.

ATHENA 2021 is only available in a 64-bit version.