对于许多抱怨其 ISP 的Internet速度的计算机用户来说，他们可能没有考虑的一个因素是其 ISP 的DNS服务器的质量。 DNS代表域名服务器(Domain Name Servers)，是您的网络浏览器用来将您在浏览器的URL栏中输入的网址转换为该网站的实际 IP 地址的工具。
例如，如果我想访问ESPN.com查看今天的篮球比分，我会在我的网络浏览器中输入 espn.com。您会注意到地址更改为 espn.go.com，并最终加载网站。但是，您也可以通过在URL(URL)栏中输入 68.71.216.176 来访问 espn.com 。当然，espn.com 比 68.71.216.176 记住要简单得多（想象一下必须记住您访问的数十个网站的 IP 地址），因此使用了DNS服务器。每当有人输入网站地址时，浏览器都会通过DNS服务器检查以找到实际的 IP 地址（对用户隐藏），并使用它来访问网站。
通常，当网站或Internet本身受到“攻击”时，实际发生的是DNS服务器正被数百万个请求轰炸，因此它们会慢下来。“互联网(Internet)”仍然存在，如果您知道要访问的网站的 IP 地址，您可以，但如果没有DNS服务器将 espn.com 快速转换为 68.71.216.176，您就不能。
一些Internet 服务提供商(Internet Service Providers)没有世界上最好的DNS服务器，因此您可能希望使用OpenDNS或Google Public DNS之类的东西来获得更好的性能。这将有助于加快网页的加载速度，不是让您的Internet更快，而是希望加快DNS响应时间。这反过来又允许您的网络浏览器更快地开始加载网页。
这是在 Windows 中执行此操作的方法。
首先，通过单击屏幕左下角的开始(Start)圆球打开控制面板，然后从(Control Panel)开始菜单(Start Menu)的右侧边栏中选择控制面板(Control Panel)。
接下来，单击网络(Network)和Internet部分。
加载后，单击网络(Network)和共享中心(Sharing Center)。
在左侧边栏中，单击更改(Change)适配器设置，这将显示您已安装在计算机上的所有网络适配器（以太网(Ethernet)、WiFi、蓝牙）的列表。(Bluetooth)
无论您希望更改哪个（例如，您可能希望同时使用Ethernet和WiFi，即使您通常使用其中一个），右键单击并从下拉菜单中选择 Properties。
现在，从列表中单击Internet 协议版本 4(Internet Protocol Version 4) ( TCP/IPv4 )，然后单击属性(Properties)按钮。
我们要在新窗口中选择的单选框是使用以下DNS服务器地址的选项（位于自动获取 DNS(Obtain DNS)服务器地址下方）。
现在，有许多可用的选项。如前所述，OpenDNS和(OpenDNS)Google Public DNS一样免费。如果你想要OpenDNS，有两个服务器：208.67.222.222 和 208.67.220.220 （你可以同时使用或两者之一）。 Google 公共 DNS(Google Public DNS)使用 8.8.8.8 和 8.8.4.4 作为其DNS服务器。当然，还有其他免费的公共DNS服务器（只需使用Google搜索即可），但OpenDNS和Google Public DNS属于标准。
完成后，只需单击“退出时验证设置”(Validate Settings Upon Exit)复选框（如果需要），然后单击“确定”按钮，即可完成。
现在，无法保证Google 公共 DNS(Google Public DNS)或OpenDNS会比您的 ISP 的默认DNS服务器更快。要检查这一点，最好的办法是使用DNS 性能测试(DNS Performance Test)（可在此处(here)获得）或 Namebench（位于此处(here)）之类的程序。当然，一次性测试可能会显示与您在现实生活中的使用体验不同的结果，因此您自己的经验和直觉可能会给您不同的结果。 无论如何(Regardless)，如果您决定尝试新的DNS服务器，您现在就知道要采取的步骤。
Use Alternate DNS Servers In Windows For Faster Internet
For mаny computer userѕ who have complaints about their ISP’s Internet speеd, one factor they may not be considering is the quality of their ISP’s DNS servers. DNS stands fоr Domain Name Servers, and is what your web browser uses to convert the web address you type into the URL bar of the browser into that website’s actual IP addrеss.
For instance, if I want to visit ESPN.com to see today’s basketball scores, I would type espn.com into my web browser. You’ll notice that the address changes to espn.go.com, and eventually the website loads. However, you can also access espn.com by typing 68.71.216.176 into the URL bar. Of course, espn.com is a lot simpler to remember than 68.71.216.176 (imagine having to remember the IP address for dozens of websites you visit), so DNS servers are used. Whenever someone types in a website address, the browser checks with a DNS server to find the actual IP address (which is hidden from the user), and uses it to access the website.
Often, when websites or the Internet itself is under “attack” what is actually happening is that DNS servers are being bombarded with millions of requests, so they slow down to a crawl. The “Internet” is still out there, and if you knew the IP address of the website you wanted to visit, you could, but without DNS servers to quickly convert espn.com to 68.71.216.176 you can’t.
Some Internet Service Providers don’t have the world’s greatest DNS servers, so you may want to use something like OpenDNS, or Google Public DNS, for better performance. This will help speed up the loading of web pages, not by making your Internet faster, but by hopefully speeding up the DNS response time. This, in turn, allows your web browser to start loading the web page more quickly.
Here’s how to do that in Windows.
First, open up the Control Panel by clicking the Start orb in the lower left hand corner of the screen, then selecting Control Panel from the right sidebar of the Start Menu.
Next, click on the Network and Internet section.
Once it loads, click on Network and Sharing Center.
From the left sidebar, click Change adapter settings, which will show you a list of all network adapters (Ethernet, WiFi, Bluetooth), you have installed on your computer.
No matter which you wish to change (you might want to do both Ethernet and WiFi, for example, even if you usually use one over the other), right-click and choose Properties from the dropdown menu.
Now, click on the Internet Protocol Version 4 (TCP/IPv4) from the list, then click the Properties button.
The radio box we want to choose on the new window is the option to Use the following DNS server addresses (located below Obtain DNS server address automatically).
Now, there are numerous options available. As mentioned, OpenDNS is free, as is Google Public DNS. If you want OpenDNS, there are two servers: 208.67.222.222 and 208.67.220.220 (you can use both or either). Google Public DNS uses 8.8.8.8 and 8.8.4.4 as its DNS servers. There are other free public DNS servers, of course (just use Google to search for them), but OpenDNS and Google Public DNS are among the standards.
When you’re finished, simply click the Validate Settings Upon Exit checkbox (if you want), then the OK button, and you’re finished.
Now, there’s no guarantee that Google Public DNS or OpenDNS will be faster than your ISP’s default DNS servers. To check this, the best bet is a program like DNS Performance Test (available here) or Namebench (located here). Of course, a one-time test may show different results from what you experience in real-life usage, so your own experiences and instincts may give you a different result. Regardless, if you do decide to try out a new DNS server, you now know the steps to take to put that in motion.
