A level I node sends CLASS1.INFORMATION, Type=9, node heartbeats on the segment it is connected to. muticast announce channel.
A level II node sends CLASS2.INFORMATION, Type=2, Level II Node Heartbeat
A level II node in addition sends CLASS2.PROTOCOL, Type=20, High end server/service capabilities on the multicast announce channel.
A level II node, like the VSCP server, that act as a gateway for other nodes send CLASS2.Information, Type=3, Level II Proxy Node Heartbeat.
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