Chapter 3
Introduction to TCP/IP

THE FOLLOWING ICND1 EXAM TOPICS ARE COVERED IN THIS CHAPTER:

1. Network Fundamentals
   1. 1.1 Compare and contrast OSI and TCP/IP models
   2. 1.2 Compare and contrast TCP and UDP protocols
   3. 1.7 Apply troubleshooting methodologies to resolve problems
   4. 1.7.a Perform fault isolation and document
   5. 1.7.b Resolve or escalate
   6. 1.7.c Verify and monitor resolution
   7. 1.9 Compare and contrast IPv4 address types
      1. 1.9.a Unicast
      2. 1.9.b Broadcast
      3. 1.9.c Multicast
   8. 1.10 Describe the need for private IPv4 addressing

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...