Cabletron Systems 100BASE-FX, Cabling Manual

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Glossary-11
Single Attached to Subnet Mask
Single Attached
Connected to an FDDI network through a single cable which does not
provide for auto-wrap functions.
Single Mode
A type of fiber optics in which light travels in one predefined mode, or
wavelength. Signals in single mode fiber optics are typically driven by
lasers. The use of lasers and the transmission characteristics of single
mode fiber optics allow the media to cover greater distances than
multimode
fiber optics.
SMA
Sub-Miniature Assembly. A modular connector and port system used in
multimode
fiber optic cabling. The SMA connector is threaded, and is
screwed into an SMA port.
SNMP
Simple Network Management Protocol. SNMP is a standardized set of
network monitoring tools. See also RMON.
Spanning Tree
A mathematical comparison and decision algorithm performed by
Ethernet bridges at power-up. Spanning tree detects the presence of data
loops and allows the bridges to selectively activate some ports while
others remain in a standby condition, avoiding the data loops and
providing redundant paths in the event of bridge failures.
SQE
Signal Quality Error. A self-monitoring test performed by some Ethernet
equipment which examines the status of the device at arbitrary and
predefined intervals.
ST
Straight-Tip. A modular connector and port system used with both
multimode
and single mode fiber optic cabling. The ST connector utilizes
an insert and twist-lock mechanism.
Station
See node.
STP
Shielded Twisted Pair. Refers to a type of cabling, most commonly used in
Token Ring networks, which consists of several strands of cables
surrounded by foil shielding, which are twisted together. See also UTP.
Straight-Through
A length of multi-stranded cable in which the transmit wire(s) of one end
is/are passed directly through the cable to the same location on the other
end. Straight-through cables are used for most facility cabling. See also
crossover
.
Subnet
A physical network within an IP network.
Subnet Mask
A 32-bit quantity which may be set up in SNMP management devices to
indicate which bits in an IP address identify the physical network.