DNS is a system that contains a list of domain names that allows users to find a particular page. It is essential for the functioning of the Internet, optimizing the performance of a website and improving its security. Matheus Clemente Mar 28, 20 | 7 min read what is DNS The DNS system is crucial for website communication on the Internet. Any strategy that involves expansion in the digital environment must consider this concept, its configuration and its implications. You need to understand, for example, the relationship between DNS, security, and website performance in order to improve your results. DNS is used by all surfers on a daily basis and it works so fast that it can go unnoticed. So how, exactly, does DNS structure the world wide web? That is what we are going to talk about in this content. Throughout this post, you will better understand how the big web works and you will be able to better configure your site . Continue reading! What is DNS? DNS is the acronym in English for Domain Name System , which in Spanish means Domain Name System . As the name implies, it is a registry containing website names and associated IP addresses.
This correlation favors the transfer of data between computers and allows access to the Internet. A more simplified understanding of DNS only requires a glance in the address bar of a browser. The domain is the name of the website ( rockcontent.com , for example), and the nameserver stores a set of them. In short: DNS is nothing more than an abstraction at the user level, allowing you to find web pages. Each name is unique for each site. What is DNS for on a website? Websites are stored on special machines, called servers, through hosting services . As we already know, each server must have a unique address that allows people to find that site and access its data. Web addresses contain a combination of IP and an associated domain. To better understand this concept, we will delve into the Internet communication protocol.
This protocol works according to the IP standard, which differs from many others due to the use of directed packets. That is, each item on a website is shipped in a package and is interpreted by the computer that sees that information. Images, texts and videos are divided into packages and shipped gradually. However, each machine on the network only communicates with another when it knows its IP. If computer X wants to receive packets from Y, it must first initiate an interaction with Y. This is only done if X knows the IP number of Y. The interaction begins with a sort of lookup for the number of Y. When a user opens the browser and types the URL of their website domain, they send a request across the network to find the respective IP of the server that stores it.
The request is sent to the provider and forwarded to DNS. Therefore, DNS works as an interface, this is a type of translator that establishes communication between two parties. Humans do not work with IP addresses arranged in the form of bits and, in turn, computers do not know how to interpret the names with our alphabetical code. However, the DNS system understands and processes both types of information, since it has a list of this data and is able to allow interaction between these different levels of abstraction. The server processes this, finds the address for that name, and returns it to the computer that sent the user’s request. Therefore, it is possible to establish the connection so that the packages are sent and the person can see the structure of the site with links, videos and images in their browser. How does DNS work in a hosting? DNS works on a subsystem infrastructure, with different servers processing information and transmitting it to others. It is like a customer service where each employee transfers the contact to the specialist in the particular subject in question. Recursive DNS works at the first layer and receives requests directly from access providers. It then passes this information to a more specific subsystem, the Root Nameserver. This, in turn, also organizes requests and transfers them to the TLD Nameserver.
The TLD Nameserver is responsible for grouping domains according to a specific term that standardizes them, the suffix: “.com” or “.org”, for example. When you type “rockcontent.com,” that request goes to TLD.com, which contains the names of that category. Then the request finally reaches the last record, the authoritative name server, which contains a list of the most specific names and IPs. It is essential that this path be followed, since the combinations of addresses on the Internet are very numerous and these servers help to catalog them. How to configure the DNS of a domain? When a user starts with a website, he must hire a hosting system ( host ), to store the data on a server and register a domain. Registration is carried out by specific companies that offer this service. In cases where the host is different from the company providing the record, a configuration is essential to connect the domain to the DNS servers. This connection is like registering a new name in existing name lists. Therefore, the new address will go through a process called propagation, which generally takes 24 to 72 hours, and after this time, the site will be available for online access. Propagation consists of the replication of a new domain by all the DNS servers in the world , allowing you to find an address anywhere on the Internet. This definition is simple and can be done by anyone.
Next, we will show you a step by step. How to configure DNS Initially, the goal is to find information about the nameservers provided by the hosting used. Usually, this information appears in the email of the plan purchase and is also available in the panel. You must copy this information. Next, you need to log into the domain registrar website of your choice, for example Hostgator . With the username and password, you will be able to access the information of the name that you just bought. Then look for the link “change DNS servers”. In “data editing”, you will find two fields for “master” and “slave 1”, here, you must paste the nameservers provided by the hosting provider. Time to save your data and wait for it to spread. This step by step is basically the same in all the hostings . Free DNS vs premium DNS: which is better? In addition to hosting systems, users can also hire specific services to manage the DNS of a website. So what should we keep in mind when choosing one? Important factors There are three fundamental factors when it comes to DNS servers:security, redundancy, and performance. The performance is associated with the loading speed of a website. As we have seen throughout this post, DNS processing directly interferes with the speed of communication with a web page. This factor is very important and has a direct impact on the user experience and their engagement . The security represents resistance possible virtual attacks such as DDoS (Distributed Denial of Service). One of these attacks can redirect the user to a completely different website, run by criminals who steal data.
That is, this can be used against the company that owns that address, thus affecting its reputation. Another factor is redundancy , a very relevant term when it comes to networks and servers. It is the ability to keep an application in the air continuously. When a particular server fails, the solution is to connect access to a secondary machine. This avoids the instability of an address and keeps the website available to users even when faced with a large number of accesses. Comparison between free and premium DNS With these aspects in mind, it is possible to compare the common free DNS service and the premium one. Generally, free ones are associated with hosting services and offer a simple architecture to protect security, ensure performance, and redundancy. Some include some DDoS protection, but it is very limited. Premium services, on the other hand, are much more complete, therefore ideal for large companies with businesses that cannot risk having a problem with their website. Take an ecommerce , for example. You must be able to stay online all the time, because if you are not available 24 hours, you will lose sales opportunities and consequently generate more profit.