Cabletron Systems SFCS-200BX - Manual (Page 176)

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GLOSSARY
SNAP - SubNetwork Access Protocol
SNMP (Simple Network Management Protocol) - the Internet standard pro-
tocol for managing nodes on an IP network.
snmpd - an SMNP agent for a given adapter card.
SONET (Synchronous Optical Network) - a new and growing body of stan-
dards that defines all aspects of transporting and managing digital traffic over
optical facilities in the public network.
Source Traffic Descriptor - a set of traffic parameters belonging to the ATM
Traffic Descriptor used during the connection set-up to capture the intrinsic
traffic characteristics of the connection requested by the source.
Spanning Tree Protocol - provides loop-free topology in a network environ-
ment where there are redundant paths.
SPANS (Simple Protocol for ATM Network Signalling) - FORE Systems’
proprietary signalling protocol used for establishing SVCs between FORE
Systems equipment.
SPARC (Scalable Processor Architecture Reduced instruction set Com-
puter)
- a powerful workstation similar to a reduced-instruction-set-comput-
ing (RISC) workstation.
SPE (Synchronous Payload Envelope) - the payload field plus a little over-
head of a basic SONET signal.
SPVC (Smart PVC) - a generic term for any communications medium which
is permanently provisioned at the end points, but switched in the middle. In
ATM, there are two kinds of SPVCs: smart permanent virtual path connec-
tions (SPVPCs) and smart permanent virtual channel connections (SPVCCs).
Static Route - a route that is entered manually into the routing table.
STM (Synchronous Transfer Mode) - a transport and switching method that
depends on information occurring in regular and fixed patterns with respect
to a reference such as a frame pattern.
STP (Shielded Twisted Pair) - two or more insulated wires that are twisted
together and then wrapped in a cable with metallic braid or foil to prevent
interference and offer noise-free transmissions.
STS (Synchronous Transport Signal) - a SONET electrical signal rate.
Sublayer - a logical subdivision of a layer.
SVC (Switched Virtual Circuit (or Channel)) - a channel established on
demand by network signalling, used for information transport between two
locations and lasting only for the duration of the transfer; the datacom equiv-
alent of a dialed telephone call.