回复:这样
When type "nslookup www.sina.com.cn"
system says:
Can't find server name for address 192.168.0.1: non-existent domain.
Default servers are not available
Server: Unknown
Address: 192.168.0.1
Non-Authoritative answer:
Name: Jupiter.sina.com.cn
Address: 61.172.201.195
Aliases: www.sina.com.cn
When type "telnet 61.172.201.195 80"
System responses:
Could not open connection to the host, on port 80: connect failed