SNAX/XF and SNAX/APN Configuration and Management Manual

Glossary
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-005
Glossary-19
session
manager is provided as part of SNAX, and a single service manager can manage both
products.
session. A temporary logical connection between two network-addressable units (NAUs) for
the purpose of exchanging data and control information in accordance with ground
rules that have been agreed upon for that exchange. A session can be activated,
tailored to provide various protocols, and deactivated, as requested.
SESSION object . An SCF object that defines a session.
session passthrough. A SNAX/XF feature that allows the SNA host to control SNA devices
on NonStop systems as if they were directly connected to the host.
session services. Support for establishing, conducting, and terminating communication
between two application programs in a network.
SET table. A table used by SNAX at session establishment that associates ESS table
names and BIND table names with source files containing these tables.
site update tape (SUT). One or more tapes that contain each target system’s site-specific
subvolume and various products. Each product contains a softdoc and a complete set
of files. A SUT is delivered with every new NonStop system and can be ordered
whenever a new version of the system software is available. A full SUT contains the
current version of the operating system and all product software that has been ordered
with it. A partial SUT contains a subset of products for the current RVU.
SLU. See secondary logical unit (SLU).
SNA. Systems Network Architecture.
SNA host. In an SNA network, the processing unit that contains a system services control
point (SSCP). Typically this is an IBM mainframe running VTAM.
SNA host application. An application running in an SNA host.
SNA peripheral node. In SNA, a node that is connected into the network through a subarea
node. The SNA peripheral node requires the routing services of the subarea node.
SNALU interface. A NonStop API that requires the application to control all SNA flows.
SNALU allows application processes in an NonStop system to communicate with SNA
devices (as a PLU) and host-resident applications (as an SLU).
SNALU protocol. A SNAX application programming protocol that requires the application to
control all SNA flows. Contrast with CRT protocol, ITI protocol, PRT protocol, and
SNALU/XS protocol.
SNALU/XS. An interface that provides the functions of the lower two SNA layers (data link
control and path control) and some functions of the transmission control layer for
SNAX/APN.