NS3000/iX NMMGR Screens Reference Manual - Edition 8 (36922-90038)

Glossary 331
Glossary
capability provided with the
management software.A network
map is also a hardcopy drawing
used when planning a network. It
shows network topology, node and
network names, addresses,
network boundaries (for an
internetwork map), and link
types.
mapping A set of characteristics
that describe a route taken by
messages to reach a destination
node. This set of characteristics is
configured with NMMGR atevery
node on a point-to-point network.
One mapping is configured at
each node for every other node on
the network to which messages
will be sent.
MAU Medium Attachment Unit.
A device attached to a ThickLAN
coaxial cable that provides the
physical and electrical connection
from the AUI cable to the coaxial
cable.
M bit More data bit. Setting this
bit in a DATA packet indicates
that at least one more DATA
packet is required to complete a
message of contiguous data.
medium attachment unit A
device attached to a ThickLAN
coaxial cable that provides the
physical and electrical connection
from the AUI cable to the coaxial
cable.
MIT Master Installation Tape. A
magnetic tape containing the
Fundamental Operating System
for an HP 3000 Series 900
computer.
modem modulator/demodulator.
A device that modulates and
demodulates signals. Primarily
used for modulating digital
signals onto carriers for
transmission and for performing
the inverse function at the
receiving end. Modems are
essential for transmitting and
receiving digital signals over
telephone lines.
modulo Value used as the
counting cycle for determining
the send sequence number (N(S))
of frames sent across an X.25
network.
modulation The process in
which certain characteristics of a
carrier signal are altered in
accordance with the changes of an
information-bearing signal.
MPE/iX MultiProgramming
Executive POSIX. The operating
system of the HP 3000 Series 900
computers. The NS 3000/iX
network services operate in
conjunction with the MPE/iX
operating system.
multiplexer MUX. A device that
allows multiple communication
links to use a single channel.