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= Wi-fi? =

 * Wi-fi: nome commerciale di standard ieee 802.11
 * Frequenze  
    * 2.4 Ghz (bluetooth, cancelli automatici, telefoni cordless, forni a microonde)
    * 5 Ghz (più "pulita")
 * Obiettivo: sostituire cavo ethernet con radio
 * Velocità:
   * 802.11b: 11 Mbps (2.4 Ghz)
   * 802.11g: 54 Mbps (2.4 Ghz)
   * 802.11a: 48 Mbps (5 Ghz)
   * cavo ethernet: 10/100/1000 Mbps


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