Re: Why is IPv6 faster?
BACNet/IP is becoming more common than the older variety, most modern BMS-enabled kit I've encountered only does the IP version.
(Which is a horrible protocol in fact)
RS232 is still the number one multi-manufacturer industrial interconnect - because it's dirt cheap and trivial to secure. It can easily be unidirectional (cut one wire), and nobody is getting in unless they have physical access.
Of course, managers then put an IP/RS232 bridge in and expose it to the Internet anyway.
RS485 is the final stage physical layer for millions networks around the world. It's better than IP due to topology - multidrop is often far more useful than star.
Often there is an IP to RS485 bridge, but the last mile (sometimes literally) is RS485.
Biting the hand that feeds IT
