00354nam a2200145Ia 4500008004100000020001500041082001900056100002000075245002200095260003200117300000800149650001300157650002400170700001400194140316s9999    xx            000 0 und d  a8176352586  a004.65bDER/HO  aDerfler,Frank J  aHow networks work  aNew DelhibTech Mediac1999  a212  ainternet  aLocal area networks  afreed,les