Business Data Communications and Networking by Jerry FitzGerald, Alan Dennis, Alexandra Durcikova

By Jerry FitzGerald, Alan Dennis, Alexandra Durcikova

The eleventh version of FitzGerald and Dennis' company information Communications and Networking specializes in extra finished updating, in addition to extra hands-on and utilized workouts. the recent version has extra in-depth assurance of routing; revisions and updates on instant; extra instances for team-based studying; and extra hands-on lab workouts. typically, this article has extra information in lots of chapters, particular updates, and up to date illustrations.

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Because these two layers are so closely tied together, decisions about the data link layer often drive the decisions about the physical layer. For this reason, some people group the physical and data link layers together and call them the hardware layers. Likewise, the transport and network layers are so closely coupled that sometimes these layers are called the internetwork layer. 3. When you design a network, you often think about the network design in terms of three groups of layers: the hardware layers (physical and data link), the internetwork layers (network and transport), and the application layer.

The Internet model is the most commonly used of the two; few people use the OSI model, although understand it is commonly required for network certification exams. 1 Open Systems Interconnection Reference Model The Open Systems Interconnection Reference model (usually called the OSI model for short) helped change the face of network computing. Before the OSI model, most commercial networks used by businesses were built using nonstandardized technologies developed by one vendor (remember that the Internet was in use at the time but was not widespread and certainly was not commercial).

Do you think this trend will continue? What are the implications for those who design and operate networks? 24. The number of standardized protocols in use at the application layer has significantly increased since the 1980s. Why? Do you think this trend will continue? What are the implications for those who design and operate networks? 25. Do you support net neutrality? Why or Why not? 26. How many bits (not bytes) are there in a 10 page text document? Hint: There are approximately 350 words on a double-spaced page.

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