Dennis, Alan. Business Data Communications and Networking Jerry,FitzGerald, Alan,Dennis. - 6th ed. - New York : John Wiley & Sons, INC. c2000. - xx 491 p.: [25] This Book Also having Appendix A,B,C,D,E,F from 423-443. ISBN: 9971512920 Dewey Class. No.: 004.6 / FIT/DEN/BUS