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Glossary
address
On a network, the identification ofastation. Inaframe,a grouping ofbitsthat
identifiesthe frame’ssource ordestination.
API
ApplicationProgramInterface.The specification of functionsand data used byone
programmoduleto access another; the programming interfacethatcorrespondsto
the boundarybetween protocol layers.
ARP
Address Resolution Protocol.Anetworklayerprotocolused to determine the
physicaladdress whichcorrespondstothe IPaddress fora hoston the network.
ARPisasub--protocolwhichoperatesunderTCP/IP.
BOOTP
Bootstrap Protocol.AUDP/IP--basedprotocolthatallowsa host toconfigureitself
dynamically.Providesameanstoassign a hostitsIPaddress, typicallywithout
userintervention.
bps
Bitspersecond.
bridge
Adevicethatconnectstwo ormore physicalnetworks which usethe same
protocol.Bridgesread framesand decidewhethertotransmitorblock thembased
on theirdestination address.
client
Acomputerprocess requesting servicefromothercomputerprocesses.
dest_idx
The destination fieldinaModbusmessage.Correspondstothe Modbusdevice
addressed inthe message.
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