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What is DNS? What Does It Do?

DNS, the Domain Name System, is like the telephone directory of the internet. It allows users to access websites using domain names (for example.

DNS, the Domain Name System, is like the telephone directory of the internet. It allows users to access websites using domain names (for example, www.example.com) that can be easily remembered through web browsers. Without DNS, people would have to remember and use complex IP addresses (for example, to access websites. This system works by translating user-friendly domain names into numeric IP addresses that the internet can understand.

The principle of how DNS works is vital to its ease of use and efficiency. As a fundamental part of the Internet, DNS provides fast and reliable access to websites. When a user enters the name of a website into a browser, the DNS query searches for and finds the IP address of the server that fulfills the user's request. This process allows the user to access information easily and quickly, and also contributes to keeping the internet organized and accessible.

How does DNS work?
DNS is activated when a user requests access to a website. For example, when a user types the address "www.example.com" into their browser, the DNS server of the user's internet service provider (ISP) initiates a query to translate this domain name into the corresponding IP address. If this information is not available in the DNS server's cache, the query is forwarded to a number of DNS servers to find the IP address of the domain name. This process continues until the required information is found.

The IP address found is sent back to the user's browser, which uses it to send a connection request to the server of the desired website. This allows the user to access the desired website. This whole process usually takes place in less than a few seconds. The DNS system provides both fast and reliable information flow in this process, making the internet experience extremely simple and effective for users.

How to Change DNS?
Changing DNS settings is usually done to improve users' internet connection speed, provide better security, or bypass restrictions on access to certain content. The method used to change DNS usually varies depending on the operating system and device type.

On Windows operating systems, go to Control Panel, click on "Network and Sharing Center" and select "Change Adapter Settings". Right-click on the network connection and select "Properties", select "Internet Protocol Version 4 (TCP/IPv4)" or "Internet Protocol Version 6 (TCP/IPv6)" and click the "Properties" button. Select the "Use the following DNS server addresses" option and enter the preferred DNS server addresses.

In macOS, select "Network" from System Preferences, select the active network connection and click on the "Advanced" button. Switching to the "DNS" tab, new DNS server addresses can be added with the "+" button. On mobile devices, changes can be made in the DNS settings section, usually under Wi-Fi settings. These operations allow the user to personalize their internet experience.

Why is there a need to change DNS?
The need to change DNS can arise for various reasons. One of these reasons is that the default DNS servers are slow or frequently interrupted. Users may prefer to switch to a different DNS service for a faster and more reliable internet experience. Also, some DNS services offer additional security features such as blocking malicious sites or parental control. These features allow users to browse the internet more safely. Another reason is to bypass access restrictions on certain content. In some countries or networks, access to various websites and services may be restricted; using an alternative DNS can provide a way to bypass such restrictions.

Is It Safe to Use DNS?
Using DNS is generally considered safe, but security depends on the quality of the DNS server used and the security features it provides. Trusted and reputable DNS providers increase security by encrypting users' queries and protecting against malicious sites. However, not all DNS servers are equally secure. Malicious DNS servers can redirect users to malicious sites or compromise personal information. Therefore, when choosing a DNS server, security features and the reputation of the service should be considered. Using a reliable DNS service ensures that the internet experience is both fast and secure.