In a single stack environment, the socket application program is always associated with the
single TCP/IP stack. Figure 1 shows an example of a z/OS® UNIX system that uses a single stack.Figure 1. A z/OS UNIX system using a single stack
The TYPE(INET) parameter on the FILESYSTYPE statement defines INET.
INET is defined by the presence of a FILESYSTYPE statement for
a socket file system whose ENTRYPOINT is not BPXTCINT. By convention,
and in this topic, TYPE(INET) parameter for INET configurations is
specified. The entry point for INET is typically EZBPFINI, for z/OS Communications Server (TCP/IP
Services).
