Have you ever imagined what it would be like if you had to memorize many sequences of numbers to access your favorite websites every day? It’s true that you might be able to memorize some, but any new site would be difficult to remember and would take too long to find.
Fortunately, there are DNS servers that perform this task of naming websites quickly and efficiently. DNS stands for Domain Name System , responsible for locating and translating addresses typed into browsers into IP addresses .
But do you know what a DNS is, why it’s important, and what resources it can register? Find out below.
What is DNS?
The term is related to computer networks and is widely used on the Internet. In short, it’s a table of domain names whose function is to store a list of records pointing to destination hosts .
The DNS system began to be used in 1984 and was essential for popularizing the Internet ; it facilitated processes , allowing brother cell phone list people to access web content without needing to understand programming.
To better explain DNS servers, we’ll give an example that’s not from the computing world, but it might help you.
Imagine that neighbor of yours who knows the name and house number of everyone on your street. He could be considered your region’s DNS . If you go to his house and ask him where someone lives, he’ll be able to give you a quick answer.
This is what the DNS system does!
If we ask “where does” the website hostgator.mx live, the DNS will respond with an IP address similar to this: 104.27.154.250 , which is the number referring to the host.
What does DNS need to work?
For DNS to work, it’s normal to imagine a computer somewhere containing the list of addresses. But, in reality, that’s not how it works. The databases are distributed across 13 servers around the world. Furthermore, they are organized in a hierarchical structure, and without these, the internet couldn’t function.
This hierarchy was created precisely to facilitate and decentralize the operation of the DNS. The server has a root domain, known as the payments via whatsapp Root Domain, located at the top of the hierarchy. From this, you can view the tree structure containing the addresses of the domains and subdomains, grouped into different zones.
Although there’s no apparent connection to the world of web development, everything related to programming, even from an IT infrastructure perspective, influences the distribution of projects on the Internet.
What resources does DNS record?
While DNS’s primary function is to record website addresses, this isn’t its only function. There are other types of records that it also stores. When an email is sent, for example, the DNS is responsible for determining where the message is going .
There are at least 10 types of DNS records , and depending on the evolution of the network, new types may be created. The most commonly used are:
- Type A : Stores the name and IP of the websites;
- CNAME : It is a nickname for the A record. It is widely used for redirection, since it points a domain or subdomain to the IP address of the registered domain;
- MX : This is specifically used for email servers. It works like this: when we send an email, the DNS looks for an MX record to determine the IP address of the mail server for a given domain.
- TXT : It is generally used to configure the SPF line, which puts into practice the anti-spam policies of most web servers;
- URL : Allows you to configure the redirection of one domain to another.
Why is it important to have a DNS service?
Remember the neighbor example? Imagine asking someone for their name and them taking a long time to answer. You’d waste time and, what’s more, you might question the legitimacy of the information, right?
With computers, the logic is the same. That’s because every millisecond a response takes represents an infinite amount of time for the internet. Not to mention that it directly impacts the ranking systems of websites like Google and Bing.
The importance of having a reliable and agile DNS service is to ensure that the website loads quickly and correctly.
But which DNS offers agility in data japan data retrieval? There are several options, but CloudFlare stands out . In addition to doing all the DNS work, it also has separate Firewall and CDN tools , among others.
Still, there are some DNS tools that can be useful. Two that stand out are:
- Into DNS : This is an excellent tool for checking the DNS records of a specific domain, including your competitor’s. It allows you to discover the hosting or email services used;
- DNS Checker : If you’ve recently changed web hosting providers or created a new website, this checker allows you to analyze how widely your domain has spread around the world.
Has the concept of DNS become clearer to you? If you’d like more information on these topics, visit our blog and discover more content about web programming.