lo        no wireless extensions.

eth0      no wireless extensions.

wlan0     IEEE 802.11bgn  ESSID:"Kanzlei-Klaiber"  
          Mode:Managed  Frequency:2.437 GHz  Access Point: 00:22:75:25:76:E9   
          Bit Rate=65 Mb/s   Tx-Power=14 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Encryption key: <hidden>
          Power Management:on
          Link Quality=67/70  Signal level=-43 dBm  
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:9428  Invalid misc:2004   Missed beacon:0