NetIPC 3000/XL Programmer's Reference Manual (5958-8600)

235
Glossary
A
address A numerical identifier
defined and used by a particular
protocol and associated software
to distinguish one node from
another.
address key address resolution
address resolution In NS
networks, the mapping of node
names to IP addresses and the
mapping of IP addresses to
subnet addresses.
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
directly accessible by people (for
example, terminal keyboards)
operate in this manner.
B
binary mode Data transfer
scheme in which no special
character processing is
performed. All characters are
considered to be data and are
passed through with no control
actions being taken.
bit Binary digit. A unit of
information that designates one
of two possible states, which are
represented by either 1 or 0.
bps Bits per second. The number
of bits passing a point per second.
buffer A logical grouping of a
system's memory resources used
by NS 3000/XL.
byte A sequence of eight
consecutive bits operated on as a
unit.
C
call In X.25, a call is an attempt
to set up communication between
two DTEs using a virtual circuit.
Also known as a virtual call.
call collision A conflict that
occurs at a DTE/DCE interface
when there is a simultaneous
attempt by the DTE and DCE to
set up a call using the same
logical channel identifier.
called address When a node
sends out a call request packet,
the packet contains the address of
the destination node.The address
of the destination node is the
called address.
calling address When a node
receives an incoming call packet,
the packet contains the address of
the sending node. The address of
the sending node is the calling
address.