00361nam a2200133Ia 4500001000500000005001700005008004100022020001500063082001400078100002000092245007800112260001600190650002100206281420261006003644.0120911s9999    xx            000 0 und d  a0078816688  a004.6 DVO  aDvorak, John C.  aDvorak's guide to desktop telecommunications / John C. Dvorak, Nick Anis.  aMcgraw Hill  aComputer network