Schneider Optics Web Embedded Server - Manual (Page 100)

Glossary
90 840 USE 115 00 Version 1.0
OSI model Open System Interconnection model. A reference standard describing the required
performance of devices for data communication. Produced by the International
Standards Organization.
packet The unit of data sent across a network.
PING Packet Internet Groper. A program used to test whether a destination on a network
can be reached.
port An access point for data entry or exit within a host using TCP services.
protocol Describes message formats and a set of rules used by two or more devices to
communicate using those formats.
PLC Programmable Logic Controller
repeater A device that connects two sections of a network and conveys signals between
them without making routing decisions or filtering packets.
router A device that connects two or more sections of a network and allows information to
flow between them. A router examines every packet it receives and decides
whether to block the packet from the rest of the network or transmit it. The router
will attempt to send the packet through the network by the most efficient path.
server Provides services to clients. This term may also refer to the computer on which the
service is based.
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