3Com AccessBuilder 500 User Manual page 110

C-8 A C: G
PPENDIX LOSSARY
Presentation layer The sixth layer of the OSI network layer model. This
layer controls the formatting and translation of data.
Protocol A set of rules and procedures that govern the exchange of
data between two communicating systems.
PSTN Public switched telephone network.
Quick Configuration A set of menu driven forms in the management
system that allow you to configure the unit for most types of ISDN
connection.
REN Ringer equivalence number.
RIP Routing information protocol.
Router A protocol transparent device that links networks. A router can
be used to separate unwanted traffic on either side of the bridge, reduce
the traffic, or to provide security from unauthorized users.
SAP Source address protocol.
Segment A section of an Ethernet network, typically connected by
repeater or a bridge to another segment.
SPX Sequenced Packet Exchange, Novell's guaranteed-delivery version
of IPX.
Session A logical connection between two communicating systems
that allows for the transfer of data.
Session layer The fifth layer of the OSI network layer model. This layer
is responsible for the security and administrative tasks of
communicating.
SNMP Simple network management protocol, a software program to
allow the remote management of bridge and routing devices.
Static Route A route you have entered and made permanent rather
than a route that the unit has learned by connecting to other routers.