Black Box LZ1500A-R3, Руководство пользователя

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UTP AND THIN ETHERNET REPEATERS
6. Glossary
Asynchronous Communication —A data transmission method in which a
packet of data is sent, and the receiver stations synchronize their clocks to
the timing embedded in the packet.
AUI Port —Attachment Unit Interface port for connecting additional
network hardware.
BNC Connectors —The connectors for 10BASE2 thin coax cable are BNC
connectors. The BNC connectors on each end of thin coax cable connect
to T-connectors, barrel connectors, and other network hardware.
BNC T-Connectors —The top of the T in a BNC T-connector functions as a
barrel connector and links two lengths of 10BASE2 cable. The third end is
used to connect to network interface cards, etc.
BNC Terminators —50-ohm terminators are used to terminate the
10BASE2 thin coax network at its ends. You can attach a BNC terminator
to one plug on a
T-connector if you will not be attaching a length of cable to that plug; you
may also need to use a BNC terminator with a grounding wire to ground
the network.
Backbone —A central network that connects several other, usually lower-
bandwidth networks, so those networks can pass data to each other.
Balun —A device that connects a BALanced line to an UNbalanced line, for
example, a twisted wire pair to coaxial cable. A balanced line is one in
which both wires are electrically equal. In an unbalanced line, such as
coaxial cable, one line (the central conductor) has different physical
properties from the other (the surrounding concentric conductor).
Bandwidth —The information-carrying capacity of a communications
system, generally measured in the number of bps (bits per second). The
higher the bandwidth of a system, the more information it can carry per
second. Ethernet products operate at 10 Mbps (10 million bits per
second).
Bridge —A device that connects two or more same protocol networks so
that devices on these networks can communicate with each other. The
bridge ascertains how to pass packets between networks based on node
address information, on filtering criteria established by the network
manager, or on both types of information.
Bus —In a network, a single, shared communications link (often a linear
run of cable) that connects all nodes. Although all network devices have
equal access to messages broadcast along the bus, each device listens for
only the messages directed to its unique address.