00337nam a2200133Ia 4500008004100000040001700041041001200058082001500070100002300085245003300108250001200141260003900153300001100192230917s9999||||xx |||||||||||||| ||und||  e123375aMAIN  aEnglish  a004.6 S18B  aStallings, William 0aBusiness data communications  a5th ed.  aNew DelhibPearson Educationc2008  a584 p.