请问为什么我ping不通www.wdlinux.cn

请问为什么我ping不通www*wdlinux*cn ???  (*号为.)


root@iZ25tgoiq9bZ:/opt# ping www.baidu.com
PING www.a.shifen.com (115.239.210.27) 56(84) bytes of data.
64 bytes from 115.239.210.27: icmp_seq=1 ttl=52 time=42.5 ms
64 bytes from 115.239.210.27: icmp_seq=2 ttl=52 time=39.2 ms
^C
--- www.a.shifen.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 39.267/40.900/42.534/1.645 ms
root@iZ25tgoiq9bZ:/opt# ping www.wdlinux.cn
ping: unknown host www.wdlinux.cn大家帮我看看,这是什么原因啊???