Understanding Data Communications and Networks

(3rd edition)


William Shay

If you have found any misprints or errors please email Bill Shay at the University of Wisconsin-Green Bay. Thanks.

Corrections Organized by Chapter

Chapter 1 Chapter 2 Chapter 3 Chapter 4
Chapter 5 Chapter 6 Chapter 7 Chapter 8
Chapter 9 Chapter 10 Chapter 11 Chapter 12
Chapter 13      


Chapter 1

Page 3. Although the ENIAC is sometimes listed as the first electronic computer, it actually is not. Several years prior to the development of the ENIAC, Dr. John Atanasoff and graduate student Clifford Berry of Iowa State University developed a prototype of the first electronic computer. The ENIAC was the first electronic computer to do calculations in a production environment. John Mauchly and J. Presper Eckert, designers of the ENIAC, used many of Atanasoff's ideas and were the first to patent a digital computer. However, after a lengthy court battle, a federal judge invalidated that patent in 1973. More information is at [http://www.cs.iastate.edu/jva/jva-archive.shtml] and [http://encarta.msn.com/encyclopedia_761587960/ENIAC.html]. Thanks to David Mohler, Graceland University.

Chapter 2

Table 2.1 states that Category 5 UTP can support bit rates up to 100 Mbps. More recent developments (discussed in Chapter 9) provide up to 1,000 Mbps rates for category 5 UTP.

Page 79 states "...in the summer of 2000, Iridium LLC was officially shut down". However, it was resurrected as Iridium satellite LLC in 2001 and was redesigned to use 66 satellites, instead of the original 77. For more on this, see [http://www.iridium.com] and [http://www.ee.surrey.ac.uk/Personal/L.Wood/constellations/iridium.html]

Chapter 3

Footnote on page 115: Replace  






Chapter 4

Figure 4.38 on page 193. part (b) of that figure shows 10 rows that are shaded. There was an error in the production that shaded one row too many. The figure should have just 9 shaded rows to be consistent with part (a) of the figure. Thanks to Clark Thomborson at The University of Auckland, New Zealand.

Chapter 5

Page 225, Figure 5.5b. The figure does not show the run length for the last run of eleven 0s from Figure 5.5a. Thus, there should be a 1011 as the last run length. Thanks to JingTao Yao, University of Regina.

Chapter 6

No errors detected

Chapter 7

Page 312: The Bureau of Export Administration has been renamed to the Bureau of Industry and Security. Also, the URL referenced on that page has been changed from [http://www.bxa.doc.gov/encryption] to [http://www.bis.doc.gov/encryption]

Chapter 8

No errors detected

Chapter 9

No errors detected

Chapter 10

No errors detected

Chapter 11

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Chapter 12

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Chapter 13

No errors detected

Last Update: Thursday, March 31, 2005