IPX/SPX Configuration and Management Manual

Glossary
IPX/SPX Configuration and Management Manual—425731-001
Glossary-2
attribute
attribute. In Distributed Systems Management (DSM), a characteristic of an entity. For
example, two attributes of a communications line might be its hop count and its retry
count.
broadcast. A packet delivery system that delivers a copy of a given packet to all hosts that
attach to it is said to broadcast the packet. Broadcast may be implemented with hardware
or software.
client. A workstation in a client-server environment. A program that requests operations from
another program. See also server
.
collector. An Event Management Service (EMS)
process that accepts event messages from
subsystems and logs them in the event log
. Compare distributor.
command message. A Subsystem Control Facility (SCF)
message, containing a command,
sent from an application program to a subsystem. Compare event message.
compatibility distributor. An Event Management Service (EMS)
distributor process that
filters event messages according to fixed (rather than user-specified) criteria and writes
the text to the standard NonStop™ Kernel console-message destinations.
connection. The path between two protocol modules that provides reliable stream delivery
service. On the Internet, a connection extends from a Transmission Control Protocol
(TCP) module on one machine to a TCP module on another machine.
connectionless service. Characteristic of the packet delivery service offered by most
hardware and by the Internet Protocol (IP). Connectionless service treats each packet or
datagram as a separate entity that contains the source and destination address. Usually,
connectionless services can drop packets or deliver them out of sequence.
consumer distributor. An Event Management Service (EMS)
distributor process that returns
selected event messages to management applications upon request.
control and inquiry. In Distributed Systems Management (DSM)
, those aspects of object
management that affect the state or configuration of an object, such as inquiries about
the object and commands pertaining to the environment (for example, commands that
set default values for the session). Compare event management
.
critical event. An event that is crucial to the operation of the system or network. Compare
noncritical event
.
DEFINED. The state of an object, indicating that it is known (defined) to the subsystem.
DELETE. A sensitive command
that removes a process from the NonStop™ IPX/SPX
subsystem.