Hach-Lange SC 1000 Controller Enhanced Communications - Manual (Page 47)

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Section 6 Glossary
Table 7 Glossary
Term Explanation
APN Access Point Name; enables access to an external packet data network.
DHCP
Dynamic Host Configuration Protocol; enables a new computer to be connected to an existing
network automatically.
DNS Domain Name System
Ethernet Physical layer for network communication, in accordance with IEEE standard 802.3.
Fixed IP server Server that assigns fixed IP addresses to end devices, and manages these.
FTP File Transfer Protocol
Gateway Networks based on different protocols can communicate with one another via gateways.
GPRS
General Packet Radio Service; packet-oriented transmission service that enables data and e-mail
to be sent using cell phones and computers.
GSM
Global System for Mobile Communications; second generation (2G) mobile communications
standard.
M2M Machine to Machine
Modbus TCP/IP Modbus protocol that is integrated in the TCP/IP protocol.
PLC Programmable logic controller
VPN
Software designed to connect devices running on a neighboring network to your own network
without the networks having to be compatible with one another. The network to which the devices
are connected is called an assigned network.
VPN client
Software that enables a device running on a network to access a secondary VPN network, i.e.
that provides a virtual simulation of the configuration of the assigned network.
VPN tunnel
Additional encryption of the original network packets within the VPN protocol to prevent
interception and manipulation.