01552nam a2200241Ia 450000500170000000800410001724500730005810000200013170000210015126000440017230000200021630000100023650000320024602000220027865000220030005000150032254600120033750506500034952002760099933600090127533700150128433800110129920260803094027.0251212s2009    xx            000 0 und d1 aPrinciples of computer networks and communication /cBarry M. Dumas.  aDumas, Barry M.  aSchwartz, Morris  aNew Jersey :bPearson Education,c2009.  axxix, 519 pages  c26 cm  aIncludes glossary and index  a978-0-13-167264-2  aComputer networks  a004.6 D89p  aEnglish  a1 Introduction 2 The modern signal carriers: electricity, light, media, and impairments 3 Signal fundamentals 4 Encoding: representing information 5 Error control 6 Communications connections 7 Digital communication techniques 8 Comprehending networks 9 Local area networks (LANs) 10 Circuit switching, the telcos, and alternatives 11 Packet switched wide area networks (WANs) 12 Internetworking and the Internet 13 TCP/IP, associated Internet protocols and routing 14 Wireless networks 15 Network Security 16 Network Management 17 Planning, designing, and implementing a network 18 The future of network communications Appendices Glossary Index  aFor undergraduate and graduate level Network and Data Communication courses. This book takes a historical approach to information systems, showing students how technologies have built upon each other so they have an appreciation of how and why current technologies exist.  aText  aUnmediated  aVolume