auto lo
iface lo inet loopback

auto eth0
allow-hotplug eth0
iface eth0 inet dhcp


#allow-hotplug wlan0
#iface wlan0 inet dhcp
#wpa-ssid XYZ
#wpa-psk XYZ
#wpa-pairwise CCMP
#wpa-group CCMP
#wpa-key-mgmt WPA-PSK
#wpa-ap-scan 2
#wpa-proto RSN

auto wlan0
allow-hotplug wlan0
iface wlan0 inet dhcp
wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf