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TCP/IP Socket Library Support for the CICS and Environment

Overview of TCP/IP

The Transmission Control Protocol/Internet Protocol (TCP/IP) provides a means of connecting existing computer networks of computers that run different operating systems and that are manufactured by different vendors. TCP/IP is designed to accommodate a large number of host computers and local networks.

The open, nonproprietary nature of TCP/IP and its global scope have made it popular among users of the UNIX environment. Standards for writing communications programs in C have also become widespread. The two most common standards are the BSD UNIX socket library interface and the UNIX System V Transport Layer Interface (TLI). The SAS/C Library currently implements the BSD UNIX socket library interface because it is somewhat more common than TLI and it has better support from the underlying communications software on OS/390 and CMS systems.


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