当我通过 IP 访问 Google 时,我得到:

当我通过域名访问 Google 时,我得到:

Windows Live Messenger 证实了这一点:

但是,Firefox 运行良好:

当我进行 DNS 查找时,我得到以下结果:
C:\Windows\system32>nslookup google.com
Server: google-public-dns-b.google.com
Address: 8.8.4.4
Non-authoritative answer:
Name: google.com
Addresses: 74.125.79.104
74.125.79.99
74.125.79.147
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但是,按名称 ping 失败(但按 IP 有效):
C:\Windows\system32>ping google.com
Ping request could not find host google.com. Please check the name and try again.
C:\Windows\system32>ping 74.125.79.104
Pinging 74.125.79.104 with 32 bytes of data:
Reply from 74.125.79.104: bytes=32 time=23ms TTL=52
Ping statistics for 74.125.79.104:
Packets: Sent = 1, Received = 1, Lost = …Run Code Online (Sandbox Code Playgroud)