>>14259373 (lb)
I would say, just guessing though, that it would be too time consuming to hit every machine.
That would mean you access the server only and have the peripheral machines cloned.
Say, for example, voting peripherals need connectivity turned off for certification, You would set the BIOS up to pass certification, then reflash with a connectivity enabled BIOS just before or on election day.
All the peripherals can be flashed from a central machine, so one password would be enough.
Thing with a remote access unit is, it's basically another computer soldered on the motherboard. It has internet connectivity, but the physical machine it's attached to may not. The remote access unit has it's own network connection, it doesn't use the physical computer's network card. Two different IP's and mac addresses.
A router, then, would log that access card's connection. Question becomes, then, if there's traffic to remote access, why do you need to be talking remotely to an access card during voting hours?