00435nam a22001097a 4500020002000000082001500020100002100035245005100056260005600107300003300163650012900196  a053495054X (hb)  a004.6bSHA  aShay, William A.  aUnderstanding data communications and networks  aPacific GrovebBrooks/Cole Publishing Companyc1999  axx, 711 p.b: ill.c; 24 cm.  aComputer networksaData transmissionaData communicationvData securityvInternet protocolsvNetwork protocolsvLANvWANvFC