Chapter 6. Fundamentals of TCP/IP Transport, Applications, and Security

This chapter covers the following subjects:

TCP/IP Layer 4 Protocols: TCP and UDP:

This section explains the functions and mechanisms used by TCP and UDP, including error recovery and port numbers.

TCP/IP Applications: This section explains the purpose of TCP/IP application layer protocols, focusing on HTTP as an example.

Network Security: This section provides some perspectives on the security threats faced by networks today, introducing some of the key tools used to help prevent and reduce the impact of those threats.

The CCNA exams focus mostly on a deeper and broader examination of the topics covered in Chapter 3 (LANs), Chapter 4 (WANs), and Chapter 5 (routing). This chapter ...

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