00358nam a22001577a 4500003000400000005001700004008004100021020001500062040000700077082001100084100002200095245003700117250001100154260002700165300000800192OSt20211230103301.0211230b        |||||||| |||| 00| 0 eng d  a0130843709  cHU  a005.71  aStallings William  aData And Computer Communications  a6th ed  aNew JerseybNew Jersey  f172