Wireless

Wireless

1. 802.11

   • 2.4GHz
   • 5GHz
   • g
     • native/mixed mode
     • channel bonding
   • n
     • MIMO
     • transmit beamforming

2. Ad-hoc mode

   • IBSS
     • BSSID = rnd 48bit number

3. Infrastructure mode

   • BSS
     • more AP = ESS
     • BSSID = MAC of AP

4. SSID

   • ESSID

5. Spread-spectrum

   • DSSS
   • FHSS
   • OFDM

6. CSMA/CA

   • DCF
     • adds backoff to IFG
     • ACK for every frame
   • PCF