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Glosssary
61202192L1-1 Express L768/L1.5 User Manual 115
router
An interface which finds the best route between two networks. Routers for-
ward packets from one network to another, based on network layer informa-
tion.
routing metric
The method by which a routing algorithm determines one route is better than
another. This information is stored in routing tables. Such tables include reli-
ability, delay bandwidth, load, MTUs, communication costs, and hop count.
RS-232-C
An EIA-specified physical interface with associated electrical signalling be-
tween DCE and DTE. The most commonly employed interface between com-
puter devices and modems.
RTMP
Routing Table Maintenance Protocol. The AppleTalk protocol used to estab-
lish and maintain the routing information that is required by internet routers
in order to route datagrams from any source socket to any destination socket
in the internet. Using RTMP, internet routers dynamically maintain routing
tables to reflect changes in internet topology.
service advertising protocol (SAP)
An IPX protocol through which network resources such as servers become
known to clients.
serving area
Region surrounding a broadcasting station where signal strength is at or
above a stated minimum. The geographic area handled by a telephone central
office facility. Generally equivalent to a LATA.
SNMP
Simple Network Management Protocol. SNMP provides a means to monitor
and set network configuration and runtime parameters.
spanning tree
A loop-free subset of the topology of a network.
SPCS
Stored Program Controlled Switch. A digital switch that supports call control,
routing, and supplementary services provision under software control. All
ISDN switches are SPCSs.