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Glossary
A system responsible for making decisions about which of several paths network (or Internet) traffic
router
will follow. The router uses a routing protocol to gain information about the network and algorithms
to choose the best route based on several criteria known as "routing metrics." See also bridge
and switch.
A table that is stored in a router or some other internetworking device that keeps tracks of routes to
routing table
particular network destinations, and, in some cases, metrics associated with those routes. A routing
table is used to select the most appropriate route to forward information.
S
Capacity of a network to keep pace with changes and growth.
scalability
symmetrical digital subscriber line. An xDSL technology that can delivers 1.168 Mbps downstream
SDSL
and upstream over a single copper twisted pair. The use of a single twisted pair limits the operating
range of SDSL to 10,000 feet (3048.8 meters). Compare with ADSL, IDSL, and SHDSL. See also DSL.
One of five categories of network management defined by ISO for the management of ISO networks.
security
management
Security management subsystems are responsible for controlling access to network resources. See
also accounting management, configuration management, fault management, and
performance management.
See SLIP.
Serial Line Internet
Protocol
Node or software program that provides services to clients.
server
single-pair high-speed digital subscriber line, also known as symmetric high bit rate digital subscriber
SHDSL
loop. A version of xDSL that includes advanced Trellis line code, a precoding mechanism, spectral
shaping, equalization circuits, and forward error correction. SHDSL can deliver 2.312 Mbps of
bandwidth downstream and upstream over a single copper twisted pair. Compare with ADSL, IDSL,
and SDSL. See also DSL.
A pair of insulated wires which are twisted together in a spiral manner. In addition, the pair is wrapped
shielded twisted
pair
with metallic foil or braid, designed to insulate the pair from electromagnetic interference. Sometimes
referred to as STP. See also twisted pair and unshielded twisted pair.
See xTU-C.
SHTU-C
See xTU-R.
SHTU-R
See SNR.
signal-to-noise ratio
See SNMP.
Simple Network
Management
Protocol
See SMF.
single-mode fiber
See SHDSL.
single-pair
high-speed digital
subscriber line
Cisco 6260 Hardware Installation Guide
GL-24
OL-2365-02
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