00359nam a2200133Ia 4500008004100000020001500041041001200056082001600068100001500084245006300099260003800162300000900200650001600209221030s9999    xx            000 0 und d  a9812400508  aEnglish  a105.23bSha  aW. A. Shay 0aUnderstanding Data Communication & Networkscby W. A. Shay  bThomson LearningaSingaporec2001  a2002  aBE Computer