One of the essential technologies for browsing, but little known to the general public, is the Google DNS (Domain Name System). And it is usually configured as standard on the routers provided by our Internet access provider (ISP).
However, this configuration is not always the most appropriate or convenient for our country. Hence the possibility of selecting an alternative service such as Google Public DNS.
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DNS is a distributed database technology that is used to translate these domain names across networks. That is, to know the IP address of the machine hosting the service we want to access.
Each computer, by default, has a small DNS server which stores a cache with the most recent addresses we have accessed. If the domain we want to visit is not in this cache, the Google DNS server that we have configured in our operating system or router will be used. Thus starting a recursive search until it is found the address.
And this is where free public DNS services like Google Public DNS come into play. It allow users to replace the address search in our internet provider’s databases with another on Google’s servers.
What is Google DNS?
When a computer is connected to a network, an IP address must be assigned to identify it among other computers. If we are in a local network with few computers, it is easy to recognize and write, even on paper, the IP addresses of each.
Well, things get complicated and the human user, who is more able to handle text addresses than IP number strings (22.214.171.124), needs more help. So, you need to an intermediate system that translates these domain names into the IP addresses of the server hosting the page or service we want to use.
Google DNS Servers
The first reason is the speed of response in resolving requests. When you visit a website, not only is a single DNS request generated, but depending on the content being accessed, there may be many requests for IP address resolution.
This causes an increase in logon time if the DNS server is slow, saturated, or unable to resolve this request by forwarding it to another computer. The servers of some ISPs can at certain times be saturated with requests from many users if the network is overloaded, slowing down the navigation of their clients.
Google DNS Service
Google has updated servers with the latest technology with large databases that index most of the world’s web pages, constantly update this information, and direct us to the server closest to our location. Therefore, in some cases the response while using DNS is faster than that of our ISP.
Is Google’s DNS Always Faster Than Others? Well no. It depends on our location, on how and where our ISP’s servers are located. And in particular on the network to which we are connected. How do I know if it’s worth it? Well, there is a very useful tool called namebench that after running it will tell us which DNS service is best for us in terms of speed.
Change DNS in Windows
If what we want is to use Google DNS only on a Windows computer, we can do it easily and the change will only affect that computer. Here are the steps to change DNS in Windows 10.
- Launch your Windows 10 configuration menu.
- Then choose the Network and Internet option to change the characteristics of our Internet connections.
- If the computer is connected directly to the router, enter the Ethernet option. Otherwise, use the Wi-Fi option that will appear. Either way, now let’s click on the Change Adapter Options
- The Network Connections panel will open, then right-click on our connection by selecting Properties.
- Then search and select the Internet Protocol Version 4 (TCP/IPv4) option. And click on the Properties button. In case we have IPv6 we will also have to configure this section in addition to the IPv4 one.
- Once the properties are displayed, choose the option Use the following DNS server addresses and enter the Google DNS addresses. Then, click Accept and we’re done.
And there you get it.
Change DNS on iOS and Android
In mobile terminals with an iOS or Android operating system, the change is very simple. Go to Settings/WiFi network configuration. We will see that the network to which we are connected appears.
Click on “Change Network”, “Advanced Options” or “About”. Depending on the version and operating system we have and look for the option where the default DNS addresses are displayed, changing them to Google if you wish.
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