lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:"retenjin"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:17:9A:D5:29:22   
          Bit Rate=54 Mb/s   Tx-Power=20 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=65/100  Signal level=65/100  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:95  Invalid misc:5584   Missed beacon:0