00397nam a2200145Ia 4500008004100000020001500041041001200056082001600068100001200084245008500096260002900181300000800210650002100218700001200239221030s9999    xx            000 0 und d  a817656186X  aEnglish  a105.23bJai  aM. Jain 0aData Communication & Networking Essentials ( DEPARTMENTAL )cby M. Jain, S. Jain  bBPB PubaNew Delhic2000  a397  aECE Departmental  aS. Jain