L
local echo A method of communication in which your
modem or software displays data “locally” on your screen,
without relying on the host computer to echo the characters
back.
log off To type a command to the host computer that
terminates the communications session.
log on To enter a series of responses to prompts by the
host computer to identify yourself, your password,
sometimes your terminal, and so forth, to start a
communications session.
M
mainframe computer A large computer whose speed
and storage capacity allow it to handle huge amounts of data
and work with many terminals.
millisecond One thousandth of a second; abbreviated ms.
MNP An abbreviation for Microcom Networking Protocol.
MNP Classes 2–4 are error control protocols. MNP Class 5 is
a data compression protocol.
modem A device for converting digital information into
tones that can be transmitted over telephone lines. The
tones are modulated (changed in frequency, amplitude, or
phase) to represent the information; modem stands for
“modulator/demodulator.”
modulate To modify or alter a signal to transmit
information; for example, conventional broadcast radio
transmits sound by modulating the amplitude (amplitude
modulation, or AM) or the frequency (frequency
modulation, or FM) of a carrier signal.
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Glossary
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