00282nam a2200121Ia 4500008004100000020001500041041000800056082001400064100001800078245003800096260001800134300000800152211209s2007    xx            000 0 und d  a8131502481  aeng  a005.8 O07  aKRAWETZ, NEAL  aINTRODUCTION TO NETWORK SECURITY   bTHOMSONc2007  a583