In addition to its communication capabilities, the Transmission Control Protocol/Internet Protocol (TCP/IP) suite includes a number of applications that range from helpful tools to essential services. This chapter examines some of the most important of these services as well as some of the tools that network administrators use to maintain and troubleshoot TCP/IP systems.
This chapter requires knowledge of the TCP/IP concepts discussed in Chapter 6, "Network Layer Protocols"; Chapter 7, "Transport Layer Protocols"; Chapter 8, "TCP/IP Fundamentals"; and Chapter 9, "TCP/IP Routing." It also requires an understanding of the structure of the networking protocol stack, as discussed in Lesson 2: The OSI Reference Model, in Chapter 1, "Networking Basics."