00690nam a2200205Ia 450000500170000000800410001702000150005804000180007304100080009108200210009910000190012024500800013925000120021926000470023130000270027865000610030565000490036665000310041565000380044620230520115629.0210716s1993    xx            000 0 und d  a8120310411  cAIMIT LIBRARY  aeng  a004.65 22bBLAU  aBlack, Uyless.  aComputer networks: bProtocols standards and interfaces /cBy Uyless Black.  a2nd ed.  aNew Delhi :bPHI Learning Pvt Ltd ,c2002.  axii,436p. ;bPBc23cm.  aCommunications between and among computers and terminals  aLayered protocols networks and the OSI model  aPersonal computer networks  aSwitching and routing in networks