每个域都有唯一的 IP 吗? [英] Does every domain have unique IPs?
问题描述
我想知道是否每个域地址都有唯一的IP地址?此外,这些 IP 位于何处?这个重定向系统是如何工作的?当我们尝试通过写域名访问网站时,它有多少重定向?
I want to know whether every domain adress has a unique IP adress? Furthermore, where these IP's are located? and how does this redirection system works? When we try to access a web site by writing domain name how many redirections does it have?
谢谢...
推荐答案
否:每个域都没有自己的 IP 地址.
No : each domain does not have its own IP address.
多个域可以托管在同一台服务器上——并且位于同一个 IP 地址上.
例如,这就是 Apache 的 VirtualHosts 背后的想法.
Several domains can be hosted on the same server -- and on the same IP address.
That's the idea behind Apache's VirtualHosts, for example.
一个域名可以对应多个不同的IP地址.
And one domain-name can correspond to several distinct IP addresses.
例如,使用 dig
命令在 google.fr
域上,您会得到 (我只复制粘贴了一部分输出) :
For example, using the dig
command on the google.fr
domain, you'd get (I only copy-pasted a portion of the output) :
$ dig google.fr
;; ANSWER SECTION:
google.fr. 71 IN A 74.125.230.81
google.fr. 71 IN A 74.125.230.82
google.fr. 71 IN A 74.125.230.83
google.fr. 71 IN A 74.125.230.84
google.fr. 71 IN A 74.125.230.80
有关更多信息,您可能应该阅读以下维基百科条目:域名系统强>.
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