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personal computers. It combines the transmitting and
receiving circuitry needed for asynchronous
communications over a serial line.
UTP
Unshielded Twisted Pair. Common, phone-grade,
twisted pair wiring that is not provided with a
protective shielding against outside interference.
WAN
Wide Area Network. A data communications network
that spans very large geographical areas.
VLAN
Virtual LAN. A logical association that allows users to
communicate as if they were physically connected to
a single LAN, independent of the actual physical
configuration of the network.
warm swapping
A feature that allows you to remove and replace a
power supply in the 7-slot chassis when the
Standby/On switch is in the Standby position or
remove and replace a power supply in the 8-slot
chassis when the On/Off switch is in the Off position,
without disconnecting the AC input power cord.
wiring closet
A central area that is used for wiring networking
systems and telephone communication systems.
10/100
Both 10 Mbps and 100 Mbps on the same port.
1000BASE-SX
A Gigabit Ethernet (GEN) Interface Module that
serves as a 2–Gigabit data channel between the
Gigabit Ethernet Switch Fabric Module and other
802.3z–compliant Gigabit Ethernet devices. GEN
Interface Modules use SC connectors. Ports on this
module use an 850-nanometer, multimode, optical
transceiver.
G
63
LOSSARY
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