TCP/IP (Parallel Library) Configuration and Management Manual

Glossary
HP NonStop TCP/IP (Parallel Library) Configuration and Management Manual—522271-006
Glossary-17
service
service. A set of primitives (operations) that a layer provides to the layer above it. The
service defines what operations the layer can perform on behalf of its users, but not
how these operations are implemented. A service relates to an interface between two
layers: the lower layer is the service provider, and the upper layer is the service user.
Compare protocol.
session. For a management application, the period during which an application can issue
commands to a subsystem.
shadow route. For multiple routes to the same destination (all the routes in addition to the
primary route) the route visible to Radix Routing topology, are called
shadow/secondary routes. Also called secondary route on page -16.
Simple Mail Transfer Protocol (SMTP). The Internet standard protocol for transferring
electronic mail messages from one machine to another. SMTP specifies how two mail
systems interact, and specifies the format of control messages the two mail systems
exchange to transfer mail.
simple token. In DSM programmatic interfaces, a token consisting of a token code and a
value that is either a single elementary field, such as an integer or a character string, or
a fixed (nonextensible) structure. Compare extensible structured token.
SLSA Subsystem. See ServerNet wide area network (SWAN) concentrator on page -16
SMTP. See Simple Mail Transfer Protocol (SMTP).
SNAP. See Subnetwork Access Protocol (SNAP).
SPI. See Subsystem Programmatic Interface (SPI).
SPI buffer. The buffer that contains an SPI message. See also SPI message.
SPI message. In DSM programmatic interfaces, a message specially formatted by the SPI
procedures for communication between a management application and a subsystem or
between one subsystem and another. An SPI message consists of a collection of
tokens. Note that an SPI message is a single block of information sent at one time, as
one interprocess message. There are two types of SPI messages, distinguished by
different sets of tokens in the header: command and response messages, and event
messages.
SPI procedures. In DSM, the set of Guardian procedures used to build and decode buffers
for use in system and network management and in certain other applications.
SPI standard definitions. In DSM programmatic interfaces, the set of declarations
available for use with the SPI procedures, regardless of the subsystem. There is also a
set of subsystem-specific declarations for each subsystem, and some sets of
declarations that apply to multiple subsystems. An application using SPI needs the SPI
standard definitions and also the subsystem definitions for all subsystems with which it