1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue state UNKNOWN 
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN qlen 1000
    link/ether 00:16:36:ac:58:82 brd ff:ff:ff:ff:ff:ff
3: wmaster0: <UP,LOWER_UP> mtu 0 qdisc pfifo_fast state UNKNOWN qlen 1000
    link/ieee802.11 00:16:cf:99:0a:1e brd 00:00:00:00:00:00
4: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:16:cf:99:0a:1e brd ff:ff:ff:ff:ff:ff
    inet 172.16.5.26/21 brd 172.16.7.255 scope global wlan0
    inet6 fe80::216:cfff:fe99:a1e/64 scope link 
       valid_lft forever preferred_lft forever