Hub
Client
Server
Protocol
Boot Protocol
Bootstrap Protocol
Band Protocol
Binary protocol
AROD
DROA
ARDO
DORA
Discover, Office, Request, Acknowledge
Discover, Operation, Reply, Acknowledge
Data, Operation, Request, Advantage
Direct, Open, Request, Apply
255.0.0.0
255.255.0.0
255.255.255.0
255.255.255.255