$ping example
PING example.co.uk (80.94.32.224): 56 data bytes
64 bytes from 80.94.32.224: icmp_seq=0 ttl=56 time=62.077 ms

然而：

$nslookup example
Server:     10.20.20.1
Address:    10.20.20.1#53

** server can't find example: NXDOMAIN

http://example/在Firefox中解析,但是：

$dig example

失败.我指着我的路由器的默认DNS(10.20.20.1,如上所述).指向其他DNS服务器似乎不会改变上述行为.