lo        no wireless extensions.

eth0      no wireless extensions.

vboxnet0  no wireless extensions.

wlan0     IEEE 802.11abg  ESSID:"Airtel"  
          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:14:6C:D0:D1:20   
          Bit Rate=36 Mb/s   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:on
          Link Quality=46/70  Signal level=-64 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0