000			00510nam a2200217Ia 4500
001			13341
005			20250221150722.0
008			250214s9999||||xx |||||||||||||| ||und||
020			_a8176353191
100			_aHeld, Gilbert
245		0	_aUnderstanding data communications
250			_a6
260			_aNew Delhi
260			_bTechmedia
260			_c1999
300			_axvi, 619p. : ill.
500			_aIncludes index.
650			_aComputer networks
650			_aData communications
942			_cBK
999			_c29392 _d29392