What is DNS and where is it used?

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The Domain Name System, known as DNS, is a system that enables the searched website to be accessed with a domain name instead of IP addresses such as 12.34.567.89 owned by devices and websites.

All devices and websites such as phones, tablets, computers, laptops have an IP. DNS maps IP addresses and domain names of devices and websites like a phone book. When you make a search, the system that allows you to type Google.com into your browser instead of is DNS.

Each device has an IP address, but DNS is used because it will not be possible to remember the IP addresses of all the websites you want to reach. If there was no DNS system, reaching a website would be possible by typing the IP address like into the browser.

How DNS Works
DNS converting a searched domain name into an IP address by typing in the browser is a process that takes seconds, but actually consists of a few steps. Let's see how the process works.

When you type the name of a website in your browser, the following processes take place, respectively;

Your computer will ask your DNS Server for the IP address of the website you are looking for, entered in the network settings.
The IP of a previously visited website is kept in the cache memory.
For a website that is not in cache memory, it applies to DNS Server for IP address resolution and redirects to Root Name Server where DNS Server is located.
Root Server directs you to TLD Servers where the domain address you are looking for is registered.
TLD Servers allow you to reach the page by directing you to the server where the website is located.
Why Change DNS?
Increasing Speed ​​and Security
Third-party DNS servers may be faster than your ISP's. Changing DNS is a tried-and-true method to increase speed, although this isn't always the case, as speed depends on how geographically close third-party DNS servers are to you. A new DNS server can be tried to increase security as well as speed.
Parental Controls
DNS is also changed in order to control and restrict the access of young children to websites. One of the easiest ways to do this filtering is to replace your DNS servers with open DNS. When you make this change, you will not be able to access the websites you have closed from any electronic devices such as phones, computers, game consoles, and tablets.

Changing DNS
Android DNS Change
Select the "Settings" menu of your Android phone or tablet, and then select "Wireless Connection".
Connect to the network whose DNS setting you want to change.
Press and hold the network you want to use and then select 'Change Network'.
Select the "Show Advanced Options" option on the screen that comes up and change the IP setting to "Static" from the menu that appears.
Type the DNS addresses you want to use in the DNS1 and DNS2 boxes.
Finally, after turning your internet connection off and on, you can connect to the internet with your DNS settings changed.
iOS DNS Change
You can follow the steps below to change the DNS settings on your iOS device.
Enter the "Settings" menu of your device and select "Wi-Fi".
On the screen that opens, click on the "I" (info) on the far right of the Wi-Fi network you are connected to.
On the screen that opens, select the "Set DNS" option below.
This setting will appear as 'Auto' unless changes are made. Click 'Manually' to change it.
Click "Add Server" at the bottom and enter your first DNS server. Put a period between the IP blocks you entered. After completing the first, click the "Add Server" button again and enter your second DNS address.
After turning your internet connection off and on, you can connect to the internet with the new DNS address.
Changing DNS Address on PC
Changing DNS Settings in Windows 7
Click on the 'Start' menu and enter the Control Panel and select the 'Network and Internet' option.
Click on 'View network status and tasks'.
On the page that opens, you will see Wireless network Connection and Local Area connection options.
"Wireless network connection" if you are connecting to the Internet wirelessly; If you are wired, right-click on the 'Local area connection' option and click 'Properties'.
On the connection screen that appears, click the "Use the following DNS server addresses" and enter the DNS address you want to connect to.
After saying "OK" and "Repair", you will have changed your DNS address.
Changing DNS Settings in Windows 10

Open 'Control Panel' and then 'Network and internet'.
Click on 'Network sharing center'.
Select "Change adapter settings" from the left pane.
Right click on the internet connection you are connected to on the page that opens and select 'Properties'.
Select "Internet Protocol Version 4 (TPC/IPv4)" from the list of properties and click the "Properties" button at the bottom.
After reaching the DNS settings change page, "The following DNS Server address

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