000			00324nam a2200133Ia 4500
005			20260413100845.0
008			230516s9999||||xx |||||||||||||| ||und||
100			_aChaudhary d Roy
245		0	_aNetwork and systems
260			_bDelhi New age internet. _c2011
300			_a946
942			_cGB
999			_c4937 _d4937