SNAX/APC Application Programming Manual

Glossary
SNAX/APC Application Programming Manual—138786
Glossary-7
LU-LU session
LU-LU session. The creation of a temporary data path consisting of a physical and a logical
connection between two LUs in separate domains for information exchange. To
establish a data path between two LUs in separate domains for data exchange, four types
of sessions must exist: SSCP-SSCP, SSCP-PU, SSCP-LU, and LU-LU.
(LU, mode) pair. A specific combination of partner LU and mode.
mapped conversation. In SNA, an LU 6.2 conversation in which the application programs
work only with the application data and are not concerned with formatting it for
transmission. Contrast with basic conversation
.
mapped conversation verbs. Standard verbs that an application program uses to implement
mapped conversations.
mixed mode conversation. A conversation that uses both basic and mapped verbs.
mode. A set of LU-LU session characteristics.
MUCB. Message unit control block.
multiple sessions. More than one session between a single logical unit and several other
logical units.
NAU. See network addressable unit (NAU)
.
NCP. Network Control Program.
network. Two or more computer systems (nodes) connected so that they can exchange
information and share resources. See also Expand network
, ServerNet system area
network (ServerNet SAN), WAN subsystem, and local area network (LAN).
network addressable unit (NAU). In SNA, a logical unit, physical unit, or a system services
control point. The NAU is the origin or the destination of information transmitted
through the network.
network node (NN). A type 2.1 node that, besides offering full SNA end-user services,
provides intermediate routing services within a type 2.1 network, and network services
to its local LUs and attached type 2.1 end nodes in its domain; it can also attach to a
subarea network as a peripheral node.
NN. See network node (NN)
.
node. In SNA, an endpoint of a link or junction common to two or more links in a network.
There are peripheral and subarea nodes. Nodes include host processors, communication
controllers, cluster controllers, and work stations. Nodes can vary in routing and other
functional capabilities.
node type (NT). In SNA, a designation of a node according to the protocols it supports and
the network addressable units that it can contain. Five types are defined: 1, 2.0, 2.1, 4
and 5.