Why do I get wifi0 and wlan0

[Jay Strauss]

Hi,

A new question.  Why do I get wifi0 and wlan0 when I ifconfig?  I'm in 
configuring something wrong, and should only get wifi0 or wlan0?

Thanks
Jay

hydrogen:~# ifconfig
lo        Link encap:Local Loopback
           inet addr:127.0.0.1  Mask:255.0.0.0
           inet6 addr: ::1/128 Scope:Host
           UP LOOPBACK RUNNING  MTU:16436  Metric:1
           RX packets:146 errors:0 dropped:0 overruns:0 frame:0
           TX packets:146 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:11709 (11.4 KiB)  TX bytes:11709 (11.4 KiB)

wifi0     Link encap:UNSPEC  HWaddr 
00-20-E0-89-8F-E2-00-00-00-00-00-00-00-00-00-00
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:7226 errors:0 dropped:0 overruns:0 frame:0
           TX packets:6098 errors:0 dropped:24 overruns:0 carrier:0
           collisions:0 txqueuelen:1000
           RX bytes:3847976 (3.6 MiB)  TX bytes:802864 (784.0 KiB)
           Interrupt:11 Memory:d8a77000-d8a78000

wlan0     Link encap:Ethernet  HWaddr 00:20:E0:89:8F:E2
           inet addr:192.168.1.101  Bcast:192.168.1.255  Mask:255.255.255.0
           inet6 addr: fe80::220:e0ff:fe89:8fe2/64 Scope:Link
           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
           RX packets:5932 errors:0 dropped:87 overruns:0 frame:0
           TX packets:6120 errors:0 dropped:0 overruns:0 carrier:0
           collisions:0 txqueuelen:0
           RX bytes:3485893 (3.3 MiB)  TX bytes:683724 (667.6 KiB)
           Interrupt:11 Memory:d8a77000-d8a78000