October 2002
Beginner
506 pages
16h 24m
English
Content preview from Mastering™ Network Security, Second Edition
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Chapter 3. Understanding How Network Systems Communicate
In this chapter, we'll review how networked systems move data from point A to point B. We're assuming that you already understand the basics of networking, such as how to assign a valid network address to a device. This chapter will focus on exactly what is going on behind the scenes and along your network cabling. This knowledge is critical in order to give context to the security concepts covered in subsequent chapters.
Featured in this chapter:
The anatomy of a frame of data
A protocol's job
The OSI model
Routers
Connectionless and connection-oriented communications
Network services
Upper-layer communications
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