lo        no wireless extensions.

eth0      no wireless extensions.

pan0      no wireless extensions.

edge0     no wireless extensions.

tap0      no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"harvardav"  
          Mode:Managed  Frequency:2.412 GHz  Access Point: 00:18:39:EA:79:FE   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          Link Quality=51/70  Signal level=-59 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0