HP e3000/iX Network Planning and Configuration Guide (36922-90037)
Glossary 261
Glossary
P
packet A block of data whose
maximum length is fixed. The
unit of information exchanged by
X.25 at level 3. There are DATA
packets and various control
packets. A packet type is
identified by the encoding of its
header.
packet exchange protocol
PXP. A transport layer protocol
used in NS 3000/iX links to
initially establish communication
between nodes when NetIPC
socket registry is used.
packet-switched network
name The name of a data
communication network adhering
to the CCITT X.25
recommendation. This can be a
PDN or a private network, such
as the HP PPN.
PAD (packet
assembler/disassembler) A
device that converts
asynchronous character streams
into packets that can be
transmitted over a packet
switching network (PSN).
PAD name A name of up to eight
characters that is associated with
a configured PAD device. The
PAD name is known to both the
DTC and the host systems that
the device can access.
PAD profile Terminal or printer
profile that specifies the
configuration characteristics for
PAD-connected devices.
partner gateway half When
gateway halves are used, two
gateway halves are required in
order to provide communication
between two networks. Each is
the partner of the other.
path name When configuring
with NMMGR, you can type a
string in the COMMAND: field on
display screens to branch to
another screen. Each screen has a
unique path name that
corresponds to its location in the
hierarchyofconfigurationscreens
presented by NMMGR.
PDN Public data network. Adata
communication network whose
services are available to any user
willing to pay for them. Most
PDNs use packet switching
techniques.
point-to-point A link that
connects either two nodes in an
NS Point-to-Point 3000/iX
network or two gateway halves.
port An outlet through which a
device can be connected to a
computer, consisting of a physical
connection point and controlling
hardware, controlling software,
and configurable port
characteristics. Ports can be
thought of as data paths through
which a device communicates
with the computer.
Precision Architecture The
hardware design structure for the
HP 3000 Series 900 computer
family.