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Last updated: Sep 20, 2022
The Domain Name System or DNS is a system that associates URLs with IP addresses. Why is DNS important? If there is no DNS, you have to type in the IP address to access a website.
It will be difficult for users to type the IP address since it contains numbers that are difficult to understand and memorize. For example, the IP address of Google.com is 172.217.0.142. With the DNS, you simply write the domain in the address bar.
The job of DNS is to translate the domain into an IP address that the computer understands so that you can access the website. So far, have you understood what DNS is?
URL and IP address have the same parts that explain each other. The role of DNS is to match the part of the URL with the IP address.
To get a deeper understanding about DNS, you need to know the four parts whose functions are interrelated with one another. The four parts of DNS are:
A DNS recursive resolver is a server whose job is to receive requests for IP address information from clients or users' computers through applications such as web browsers. The recursive resolver will search for information to provide answers based on client requests.
The search for information will start once the cache is stored in the browser. If it is not there, the Recursive resolver will continue to search the cache on the Internet Service Provider (ISP).
The root server is a database that contains answers to questions about domain names and IP addresses. The job of the root server is to translate the domain name into an IP address. Not all questions can be answered by a root server. If the root server does not have an answer, then the request for information will be forwarded to the other party.
There are 13 root servers worldwide that are alphabetically ordered and managed by organizations, such as the Internet System Consortium, Verisign, the University of Maryland, and the U.S. Army Research Lab.
Top Level Domain or TLD server is used to find a more specific IP address. For example, TLD .id for Indonesian servers, .org for non-profit organizations or institutions, and .sch for schools.
The information provided by the TLD will assist the system in forwarding the search for information to a server that has related data.
The authoritative server contains complete information about the website you want to go to. If the information sought is in accordance with the results, the browser will display the website to the user.
Some of the information on the authoritative server will be stored by the browser in the form of a cache. That way, the loading process will be faster when a user wants to re-access a website. Nevertheless, the browser will still continue to update the website information.
To get a deeper understanding of what DNS is, then you also need to know its function. The explanation of the DNS functions are as follows:
There are various types of DNS that you need to know. The explanations for each type of DNS are:
To give you a better understanding of what DNS is, you need to learn how it works. Here are the steps to understanding how DNS works:
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