000			00375nam a2200169Ia 4500
008			230512s9999 xx 000 0 und d
041			_aeng
082			_a4.6
100			_aKHURANA M
245			_aDATA COMMUNICATION SYSTEM
250			_a1
260			_bFIREWALL MEDIA NEW DELHI
365			_b161
500			_aPaper Back
520			_aText Book
650			_aComputer
999			_c414102 _d414102