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glo-2 SmartSwitch 1800 4.0 User Guide, Rev 01
Async terminal
is a VT100 or compatible video display terminal.
Autobaud
is the default line speed code (throughput class) for async PAD ports. When a PAD
places a call through a port set to Autobaud, the port's internal clocks are set to match
the speed of the PAD.
B
Bandwidth
is the difference between the lowest and highest frequencies of a transmission channel,
usually expressed in hertz (Hz).
Banner
is the display area at the top of a screen that generally features product name, revision,
etc.
BPDU
stands for “Bridge Protocol Data Unit,” also called a “Hello” message. Bridges peri-
odically send BPDUs to update each other on their status.
bps
stands for “bits per second,” which is a rate of data transmission.
Bridge
is a device that links two local-area networks (LANs), receiving data from one LAN
and forwarding it to the other.
Broadcast
is a method of delivering the same data to all hosts in a network.
Buffer
is a storage device or routine used to compensate for a difference in the rate of data
flow or time of occurrence when transmitting data between devices.
C
Call
is a request for connection between two DTEs, each using a logical channels across
the DTE/DCE interface.
Checksum
is an arithmetic sum used to verify the integrity of bits of data. A bad checksum means
that the data is corrupted. An IP checksum is calculated only for the IP header, and is
re-calculated each time the datagram is transmitted.
Cluster controller
is a device that controls input/output of a group of devices (terminals, printers, PCs,
etc.) attached to it, and linking these devices to a mainframe.