Configuring and Managing Host-Based X.25 Links - Edition 5 (36939-90054)

194 Glossary
Glossary
destination node name In DTS
configuration, it is either 1) the
name of a host that a user can be
connected to by default (if
switching is not enabled for that
user, or if automatic modem
connection is enabled), or 2) the
name of the only host that can
access a dedicated printer.
device class A collection of
devices that have some
user-defined relation. Device
classes are assigned through use
of the NMMGR configuration
utility.
device-dependent
characteristic A file
specification for which
modifications are restricted
because of the type of device on
which the file is opened. For
example, data directed to
terminals must have a blocking
factor of one.
device driver Software module
that controls a specific type of
input/output device including
NS 3000/iX links.
device file A file being input to
or output from any peripheral
device except a disk. MPE allows
operations to be performed on the
device itself as if it were a file.
device independence A
characteristic of the operating
system that allows users to
selectively redirect input/output
from a program, session, or job
without regard to the nature of
the device.
device name See PAD name.
Dial ID protocol A proprietary
Hewlett-Packard protocol that
provides security checking and
address exchange for dial links.
dial link A connection made
through public telephone lines.
direct-connect device
Asynchronous device that is
connected directly to a DTC
through an RS-232-C or RS-422
cable, with no intervening
communications equipment. Also
referred to as a “local connection.”
direct connection Aleased line,
private line, or other
non-switched link in a network.
direct dial A dial link through
which only one remote node can
be reached.
direct-path branching The
process of directly accessing any
screen in NMMGR by entering
path names in the Command:
field. The path name must be
preceded by an at sign (@).
domain name A name
designated for a system in
ARPANET standard format. This
name can be used by other nodes
on the network to access the host
for which it is configured.
download The process ofloading
operating code and configuration
files into the DTC’s memory. The
DTC is downloaded by the host
computer for LANs using