什么是域名解析?
域名解析是将域名(www.example.com)转换为与之对应的IP地址的过程,当我们在浏览器中输入一个网址时,浏览器会向DNS服务器发送请求,询问该网址对应的IP地址,DNS服务器收到请求后,会返回与该域名对应的IP地址,浏览器再通过这个IP地址访问网站。
如何进行域名解析查询?
1、打开浏览器,输入以下命令:
ping www.example.com
将“www.example.com”替换为你想查询的域名,按下回车键后,你会看到类似如下的输出:
Pinging www.example.com [93.184.216.34] with 32 bytes of data: Reply from 93.184.216.34: time=10ms Reply from 93.184.216.34: time=10ms Reply from 93.184.216.34: time=10ms Reply from 93.184.216.34: time=10ms Pong!
这个过程就是域名解析的过程,在这个例子中,我们使用了ping
命令来测试域名解析是否正常,如果能够收到回复,说明域名解析正常;如果没有收到回复,可能是域名解析出现了问题。
2、在Windows系统中,可以使用nslookup
命令进行域名解析查询,打开命令提示符(按Win+R键,输入cmd
,然后按回车键),输入以下命令:
nslookup www.example.com
同样,将“www.example.com”替换为你想查询的域名,按下回车键后,你会看到类似如下的输出:
Server: UnKnown Address: 192.168.1.1 Non-authoritative answer: Name: www.example.com Address: 93.184.216.34
这个过程就是使用nslookup
命令进行域名解析的过程,在这个例子中,我们得到了与ping
命令类似的输出信息,从输出信息中,我们可以看到域名对应的IP地址为93.184.216.34。
3、在macOS和Linux系统中,可以使用dig
命令进行域名解析查询,打开终端(在macOS中按Cmd+空格键,输入“terminal”,然后按回车键;在Linux中按Ctrl+Alt+T键),输入以下命令:
dig www.example.com A +short
同样,将“www.example.com”替换为你想查询的域名,按下回车键后,你会看到类似如下的输出:
; <<>> DiG 9.8.5-3ubuntu1~16.04-bionic-logrotate (Ubuntu) <<>> www.example.com A +short ;; global options: +cmdtype help ;; Got answer: ;; ->>HEADER<<opcode: QUERY, status: NOERROR, id: 55555 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 65494 ;; QUESTION SECTION: ;www.example.com. IN A ;; ANSWER SECTION: www.example.com. 3600 IN A 93.184.216.34 ;; Query time: 0 msec ;; SERVER: UNKNOWN, FORWARDER INFO: unknown, BEACON: unknown (unknown), RESOLVER: unknown (unknown) ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<------------------------------------------------------------------------------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>___/ ___/ _________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________/ ______ <______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|______|_----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v-----v---------->____/ <____/ →↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓←[u'status': 'NOERROR', u'菜鸟教程', u'www', u'example', u'com']
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