Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Glossary 313
Glossary
Master Installation Tape that
form the basic core of the MPE/iX
operating system.
full gateway A full gateway is a
node that belongs to more than
one network and has one IP
address for each network. It uses
store and forward to transfer
packets between each network
that it belongs to.
G
gateway A node that connects
two dissimilar network
architectures. A gateway can be
either a single node (full gateway)
or two gateway halves.
gateway half A node that works
in conjunction with another node
on another network to form an
internetwork. The only protocol
used by gateway halves is the NS
Point-to-Point 3000/iX Link. See
also full gateway.
gateway-half link A link
between the two nodes of a
gateway-half pair. Eachof thetwo
nodes of a gateway-half pair has a
configured link (hardware
interface card) that is used for the
gateway half network interface.
The NS Point-to-Point 3000/iX
Link is the only link that can be
used as a gateway-half link.
gateway-half pair A set of two
nodes that are joined by a
gateway-half link. Each node in
the pair must have a
gateway-half network interface
configured, using the link.
Guided Configuration A
method of configuring a node in
which a subset of the complete
NMMGR interface is presented,
and defaults of configurable
values are used automatically.
H
handshaking Acommunications
protocol between devices or
between a device and the CPU.
Provides a method of determining
that each end of a
communications link is ready to
transmit or receive data, and that
transmission has occurred
without error.
hardware handshake Uses
modem signals CTS and RTS to
pace the data transfer from the
DTC to the attached device. (For
DTC 72MX only.)
hop count See internet hop
count and intranet hop count
host-based network
management A method of
managing asynchronous
communications for HP 3000
Series 900 computers. All of the
controlsoftware is configured ona
single MPE/iX host and is
downloaded to the DTCs that are
managed by that host. With host
based management, a permanent
relationship exists between each
DTC and the host. Terminal users
can access only the single MPE/iX
system that owns the DTC their
terminal is connected to.