150 Using IBM Application Development Tools for z/OS and OS/390
4.2 System configuration
The following SNA terms will be used in this chapter:
Logical unit (LU): This is a port through which an end user accesses an SNA network to
communicate with another end user or the system services control point (SSCP).
Transaction program (TP): In WSim, this is any program using LU6.2 communications
protocols to communicate with another program. WSim implements TPs using CPI-C.
Session: A session is a logical connection enabling two network addressable units to
communicate with each other, such as an LU-LU, or an SSCP-LU session. Each half of a
session is a half-session.
Both the network to be simulated and the system to be used to run WSim must be con ...