What Is in This Chapter?adapterarchitectureautomation assetBOOTPbroadcastbroadcast addressbroadcast domainCIDRclassful deviceclassless devicecontrol networkdevicedevice networkDHCPDIO networkdistributed equipmentDTMEthernetEthernet DIO scanner serviceEthernet I/O scanner serviceEtherNet/IPexplicit messagingFTPgatewayHTTPI/O scannerIPIP addresslogical networkmaskmodulenetwork addressNTPobjectOSIPACport mirroringQoSredundant controllerrouterRSTPservice portSMTPSNMPSNTPsubnet addresssubnet maskswitchsystem projectsystem serverTCPTCP/IPTFTP