lo        no wireless extensions.

eth0      no wireless extensions.

wifi0     no wireless extensions.

ath0      IEEE 802.11g  ESSID:"linksys"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:16:01:E6:38:30   
          Bit Rate:54 Mb/s   Tx-Power:16 dBm   Sensitivity=1/1  
          Retry:off   RTS thr:off   Fragment thr:off
          Encryption key: <hidden>
          Power Management:off
          Link Quality=36/70  Signal level=-55 dBm  Noise level=-91 dBm
          Rx invalid nwid:6734  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0