# iwlist scan                  # from a linux, iwl3945 client
          Cell 04 - Address: 00:1C:xx:xx:xx:A5
                    ESSID:"encrypted"
                    Mode:Master
                    Channel:10
                    Frequency:2.457 GHz (Channel 10)
                    Quality=76/100  Signal level=-58 dBm  Noise level=-82 dBm
                    Encryption key:on
                    IE: WPA Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : TKIP
                        Pairwise Ciphers (2) : CCMP TKIP
                        Authentication Suites (1) : PSK
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
                              12 Mb/s; 48 Mb/s
                    Extra:tsf=00000000828ccb79
          Cell 06 - Address: 02:1C:xx:xx:xx:A6
                    ESSID:"Open, free wifi. Enjoy."
                    Mode:Master
                    Channel:10
                    Frequency:2.457 GHz (Channel 10)
                    Quality=77/100  Signal level=-57 dBm  Noise level=-82 dBm
                    Encryption key:off
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 18 Mb/s
                              24 Mb/s; 36 Mb/s; 54 Mb/s; 6 Mb/s; 9 Mb/s
                              12 Mb/s; 48 Mb/s
                    Extra:tsf=00000000828cc4ec

# # iwconfig on the WRT54GL:
# iwconfig
wl0       IEEE 802.11-DS  ESSID:"encrypted"  
          Mode:Master  Frequency:2.457 GHz  Access Point: 00:1C:xx:xx:xx:A5   
          Bit Rate=54 Mb/s   Tx-Power:32 dBm   
          Retry min limit:7   RTS thr:off   Fragment thr:off
          Link Quality:5  Signal level:0  Noise level:166
          Rx invalid nwid:0  Rx invalid crypt:42  Rx invalid frag:0
          Tx excessive retries:364  Invalid misc:0   Missed beacon:0

wds0.1    no wireless extensions.

wl0.1     IEEE 802.11-DS  ESSID:"Open, free wifi. Enjoy."  
          Mode:Master  Channel:10  Access Point: 02:1C:xx:xx:xx:A6   
          Bit Rate=54 Mb/s   
          RTS thr:off   Fragment thr:off