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D. Glossary
10BASE-T Cross-over Cable — A standard 10BASE-T
Ethernet cable with pins 1 & 3 and 2 & 6 crossed to allow two
Ethernet devices with the same pin specification to communicate
directly with one another.
Access Point — An internetworking device that seamlessly
connects wired and wireless networks together.
Bandwidth — The size (in Hertz) of the frequency range that a
signal transmission occupies. Typical narrow band signals oc-
cupy a 25 KHz bandwidth. The RangeLAN2 signal occupies a 1
MHz bandwidth.
Channel — In RangeLAN2 networks, the channel refers to the
frequency hopping sequence the card follows.
CSMA/CA — (Carrier Sense Multiple Access/Collision Avoid-
ance) — CSMA is a protocol in which each node senses whether
or not a channel is in use before attempting to transmit informa-
tion. CA is an optimization by which channel time is reserved to
avoid collisions.
DCE — (Data Communication Equipment) — A device, such as
a modem, which connects to a DTE with a serial cable, that
allows a DTE to send and receive data with remote locations.
DTE — (Data Terminal Equipment) — A device, such as a
computer or dumb terminal, which connects to a DCE from its
serial port in order to send and receive data with remote locations.
Download Image — A software file that is used to upgrade the
software code running on the Ethernet Adapter.