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101 0 $aeng
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181   $ctxt$2rdacontent
182   $cc$2rdamedia
183   $acr$2rdacarrier
200 10$aUnderstanding data communications $efrom fundamentals to networking /$fGilbert Held
205   $aThird edition.
210  1$aChichester :$cJohn Wiley & Sons, Ltd.,$d[2000].
215   $a1 online resource (857 pages)
300   $aBibliographic Level Mode of Issuance: Monograph
311 1 $a9780471627456 
311 1 $a0471627453 
327   $aPreface. -- Acknowledgements. -- Communications in a Modern Society. -- Basic Telegraph and Telephone Operations. -- Basic Circuit Parameters, Measurement Units and Media Overview. -- Fundamental Data Transmission Concepts. -- Terminals, Workstations and WAN and LAN Networking Overview. -- Representative Standards Organizations: the OSI Reference Model. -- The Physical Layer, Cables, Connectors, Plugs and Jacks. -- Basic Transmission Devices: Line Drivers, Modems, and Service Units. -- Regulators and Carriers. -- Transmission Errors: Causes, Measurements and Correction Methods. -- The WAN Data Link Layer. -- Increasing WAN Line Utilization. -- Local Area Networks. -- Basic LAN Internetworking. -- Digital Transmission Systems and Equipment. -- Network Architecture. -- Packet Networks. -- Communications Software. -- Fiber-Optic, Satellite and Wireless Terrestrial Communications. -- Evolving Technologies. -- Index.
330   $aNow in its third edition, Understanding Data Comunications, provides a comprehensive introduction to the field of data communications for both students and professionals. Assuming no prior knowledge of the field, it presents an overview of the role of communications, their importance, and the fundamental concepts of using the ISO's 7-layer approach to present the various aspects of networking.* Covers the evolving high speed network access via digital subscriber line, cable modems and wireless communication.* Examines the role of regulatory and standardization bodies, the operation of the Internet and the use of a variety of electronic applications.* Includes a series of comprehensive questions covering the important concepts from each section.* Describes the digital network used by communications carriers and the methods used to obtain access to the digital highway.* Discusses frequency division multiplexing which forms the foundation for the operation of several types of high speed digital subscriber line.Aimed at the senior level undergraduate and graduate computer science student, it is also essential reading for data processing professionals and those involved in computer science and data communications.
606   $aData transmission systems
606   $aComputer networks
606   $aDades$xTransmissió$2lemac
606   $aOrdinadors, Xarxes d'$2lemac
615  0$aData transmission systems.
615  0$aComputer networks.
615  7$aDades$xTransmissió
615  7$aOrdinadors, Xarxes d'
676   $a004.6
700   $aHeld$b Gilbert$f1943-$027769
801  0$bPQKB
906   $aBOOK
912   $a9911019968303321
996   $aUnderstanding data communications$91502612
997   $aUNINA