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In this chapter, we will take a look at the TCP/IP protocol stack to help us better understand how TCP/IP functions in the network. We'll look at the Department Of Defense (DoD) protocol layers and the Open Systems Interconnect (OSI) model to help us better understand how protocols and utilities function at various layers. We'll discuss the protocols that comprise the TCP/IP suite of protocols and look at some TCP/IP configuration and troubleshooting information.

At the end of this chapter, you will be able to:

· Discuss the protocols that support the internet.

· List the layers in the OSI and DoD networking models.

· Describe the TCP/IP suite of protocols.

TCP/IP made early WANS possible. TCP/IP's robust set of protocols provided complete networking support to connect all hosts and sites and rapidly became the standard for such activities. Over time, the TCP/IP suite of protocols and utilities has become much more than just a standard-it has helped us usher in a new era of computing. We can now configure machines around the world and monitor events on distant computers. Although local area networking standards remained in the realm of proprietary vendor standards until the mid 1980's, they have changed so much since then that today there is nearly total interoperability in the TCP/IP world. With TCP/IP, we can connect to the world. Before we do that, however, let's look closer at what the protocol suite is capable of doing

Abstract

This chapter examines the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite in greater detail, analyzing its four layers and the core protocols used within each layer. Network administrators must have an understanding of the core protocols in the various layers and their functions to understand how networking applications work, how data is sent from one application to another, and how to interpret network captures. This chapter also discusses the two main application programming interfaces (APIs) that networking applications for the Microsoft® Windows® operating systems use and the APIs' naming schemes.

For a download of the entire "TCP/IP Fundamentals for Microsoft Windows" online book, which contains a version of this chapter that has been updated for Windows Vista and Windows Server 2008,

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