00345nam a2200121 a 450000500170000002000180001708200150003510000230005024500740007325000120014726000390015930000250019820251203110930.0  a9788177585698  a004.6bSTA  aStallings, William  aHigh-speed networks and internetsbperformance and quality of service  a2nd ed.  aNew DelhibPearson Educationc2002  axic715p.c26 cm. PB