lo        no wireless extensions.

eth0      no wireless extensions.

wmaster0  no wireless extensions.

pan0      no wireless extensions.

wlan0     IEEE 802.11abgn  ESSID:"CefetGuarulhos"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:17:9A:B9:01:DE   
          Bit Rate=54 Mb/s   Tx-Power=15 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key:406B-9ABC-D6B5-A6E7-7290-E368-3AF9-4CE7-0F1B-DA67-C574-CE9E-6BA3-00CC-E689-CBD3 [3]
          Power Management:off
          Link Quality=67/70  Signal level=-43 dBm  Noise level=-88 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0