000			00519 a2200205 4500
020			_a8176352586
082			_a004.65 _bDER
090			_c23655 _d38193
100			_aDerfler, Frank J.
245			_aHow networks work
250			_a4th ed.
260			_aDarya Ganj _bTechmedia _c1999 _g1999
300			_ax,212p. _c25cm
650			_aComputer science
650			_aData processing
650			_aInterfacing and communications
650			_aCommunication network architecture
700			_aFreed, Les
942			_cL
999			_c50870 _d50870