每个域都有唯一的IP吗? [英] Does every domain have unique IPs?
问题描述
此外,这些IP位于哪里?这个重定向系统如何工作?
当我们尝试通过写域名访问一个网站有多少重定向?
谢谢...
否:每个域都没有自己的IP地址。
相同的服务器 - 并在相同的IP地址。
这就是Apache的VirtualHosts背后的主意,例如。$ /
一个域名可以对应几个不同的IP
例如,使用 dig
命令在 google.fr
域,你会得到(我只复制粘贴输出的一部分):
$ dig google.fr
;;解答部分:
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
如需更多信息,您应该阅读以下维基百科条目: 域名系统 。
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?
Thanks...
No : each domain does not have its own IP address.
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.
And one domain-name can correspond to several distinct IP addresses.
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
For more informations, you should probably read the following wikipedia entry : Domain Name System.
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