Chapter 3Introduction to TCP/IP

images The Transmission Control Protocol/Internet Protocol (TCP/IP) suite was designed and implemented by the Department of Defense (DoD) to ensure and preserve data integrity as well as maintain communications in the event of catastrophic war. So it follows that if designed and implemented correctly, a TCP/IP network can be a secure, dependable, and resilient one.

In this chapter, I’ll cover the protocols of TCP/IP, and throughout this book, you’ll learn how to create a solid TCP/IP network with Cisco routers and switches.

We’ll begin by exploring the DoD’s version of TCP/IP, then compare that version and its protocols ...

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