00465nam a2200181Ia 450000100060000000300040000600500170001000800410002702000180006804000130008608200180009910000170011724500760013425000080021026000470021830000110026554600070027618017OSt20190209141851.0140405s9999    xx            000 0 und d  a0-13-175605-2  cPK-LaUMT  a 004.6bBLA-C  aUyless Black  aComputer networks:bProtocols, standards, and interfancescUyless Black  a2nd  aEnglwood Cliffs,USA:bPrentice-Hall,c1993  a436 p.  aEN