Scenario 3: NTIER
This scenario shows a C++ ODBC Web Service Application using unixODBC with Apache on Linux connecting to DB2 on AS400 and VSAM on z/OS.
This architectural layout describes a web or NTIER application. The C++ ODBC Web Service uses NTIER because NTIER had been enabled in this machine's sqlregistry (CONNX's configuration repository for UNIX systems).
NTIER gives the end user unlimited connections from a designated client machine. Each NTIER license is single machine specific.
The NTIER license is ideal for web server use because it allows unlimited connections, although only one session can be active at a time. If you want to have multiple active sessions, consider purchasing multiple NTIER licenses.