3 Chapter 3. Base functions The term base functions implies the minimum configuration required for the proper operation of a z/OS TCP/IP environment. The base functions described in this chapter are considered necessary for any useful deployment of the TCP/IP stack and commonly used applications. This chapter discusses the following. Section 3.1, "The base functions" on page 50 3.2, "Why base functions are important" on page 51 3.3, "Common design scenarios for base functions" on page 51 3.4, "How the base functions are implemented in a single stack" on page 55 Topic Discusses the basic concepts of base functions Discusses key characteristics of base functions and why they may be important in your environment Presents commonly implemented base functions design scenarios, their dependencies, advantages, and considerations and our recommendations Presents selected implementation scenarios, tasks, configuration examples, and problem determination suggestions © Copyright IBM Corp. 2006. All rights reserved. 49