4
G
LOSSARY
out-of-band
Transmission of auxiliary information e.g., management messages, over
a media other than that used by the system users.
point-to-point call
A two-way call or connection that has one source and one destination.
point-to-multipoint
call
A one-way call or connection that has only one source, but may have
many destinations.
protocol
A set of rules for communicating between communication devices. The
rules dictate format, timing, sequencing, and error control.
Protocol Data Unit
(PDU)
A unit of data specified in a layer protocol and consisting of protocol
control information and layer user data.
Permanent Virtual
Connection (PVC)
. A basic connection method that requires the user to define each
connection manually.
router
A device that connects two or more remote networks by selectively
forwarding messages between them. A router differs from a bridge in
that it selectively forwards information between the networks, based
on layer 3 protocols.
RJ-21port
50-pin Telco connector on 7400 Interface Card that supports 12
10BaseT ports for high-density connections.
server
A computer that provides clients with application and network services.
Servers are shared by multiple users.
Simple Network
Management
Protocol (SNMP)
A protocol originally designed to be used in managing TCP/IP-based
internets. SNMP is presently implemented on a wide variety of
computers and networking equipment and may be used to manage
many aspects of network and end-station operation.
Switched Virtual
Connection (SVC)
An ATM standard signaling protocol that automatically defines
connections as they are needed, and discards them when desired.
topology
The physical or logical placement of stations on a network in relation to
one another.
Virtual Channel
Identifier (VCI)
Part of the identifier of a particular virtual circuit in the ATM fabric.
Virtual Path
Identifier (VPI)
Part of the identifier of a particular virtual circuit in the ATM fabric.
abtthgde.book Page 4 Tuesday, June 23, 1998 10:29 AM
