000 00273nam a2200121Ia 4500
008 211126s9999 xx 000 0 und d
082 _a4.6
100 _aS.D.SHARMA
245 0 _aDATA COMMUNICATIONS AND NETWORKS
260 _bFALCON
365 _b70.00
942 _cBTECH
999 _c164598
_d164598