eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"dlink"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 02:24:01:55:02:77   
          Bit Rate=1 Mb/s   Tx-Power=14 dBm   
          Retry short limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=41/70  Signal level=-69 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:180   Missed beacon:0

lo        no wireless extensions.