00369nam a2200133Ia 4500008004100000020000900041082001900050100001200069245005500081260004500136260000900181300000800190650003700198150723s9999    xx            000 0 und d  a3304  a 004.65  DIN-I  a Dinkar  a Introduction to data communication and networking  b New Central Book Agency (P) Ltd., Delhi  c2010  a213  a Computer communication networks