00418nam a2200157Ia 450000100060000000800410000602000180004704000130006508200180007810000210009624500660011725000080018326000510019130000110024254600070025319126140407s9999    xx            000 0 und d  a0-13-083238-3  cPK-LaUMT  a 004.6bPAN-B  aRaymond R. Panko  aBusiness data communications and networkingcRaymond R. Panko  a2nd  aLondon,UK:bPrentice-Hall International,c1999  a464 p.  aEN