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

Glossary 189
Glossary
Glossary
access port A special interface
card in the system cabinet
through which the system console
is connected.
address A numerical identifier
defined and used by a particular
protocol and associated software
to distinguish one node from
another.
address key See X.25 address
key.
address resolution In NS
networks, the mapping of node
names to IP addresses and the
mapping of IP addresses to
subnet addresses.
address resolution protocol
ARP. A protocol used by LAN
links with Ethernet enabled that
provides a means of exchanging
addressing information between
Ethernet nodes.
adjacent A node on a
point-to-point network that is
connected to another node by a
single link with no intervening
nodes.
ARPA Advanced Research
Projects Agency. It is the former
name of the Defense Advanced
Research Project Agency
(DARPA). The Internet suite of
protocols was developed under
ARPA guidance.
ARPA Telnet Access An HP
product which is a board that can
be installed in a DTC 48 and
DTC 72MX. The Telnet Access
board performs protocol
translation. Calls to the IP
address of an MPE/iX system are
detected by the Telnet Access
board and are retransmitted on
the LAN using AFCP, allowing
connections from terminals on
ARPA systems to HP 3000s.
APRA Telnet Express An HP
product which is a standalone
hardware platform dedicated to
performing protocol translation.
Calls to the IP address of an
MPE/iX system are detected by
the Telnet Express and are
retransmitted on the LAN using
AFCP, allowing connections from
terminals on ARPA systems to
HP 3000s.
ARPANET The (Advanced
Research Projects Agency)
computer network.
ASCII American National
Standard Code for Information
Interchange. A character set
using 7-bit code used for
information interchange among
data processing and data
communications systems. The
American implementation of
International Alphabet No. 5.
asynchronous Term used to
describe a device’s mode of
operation whereby a sequence of
operations are executed
irrespective of time coincidence
with any event. Devices that are