000			00414nam a2200121Ia 4500
008			130131s9999 xx 000 0 und d
100			_aStallings, William
245			_aData and computer communications / William Stallings.
250			_a9th ed.
260			_bUpper Saddle River, N.J. : Pearson Education, c2011
300			_axvi, 881 p. : ill. ; 23 cm.
650			_aData transmission systems. Computer networks.
999			_c33515 _d33105