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Data Link Layer
BACnet/IP
MS/TP
Application Services
WhoIs,, I-Am
Who-Has, I-Have,
ReadProperty
WriteProperty
etc.
Network Routing Information
BACnet - Protocol
Preamble
0x55
0xFF
Frame
Type
0x06
Destination
MAC
0xFF
Source
MAC
0x01
BVLL
Type
0x81
BVLC
Function
0x0B
Length
0x0015
NPDU
APDU
Length
0x0015
Header
CRC
0x78
Data
CRC
0xDD38