The DNS (Domain Name System) is a computer system that is used to translate domain names into IP addresses. On the Internet, domain names are used instead of IP addresses because they are easier for people to remember. For example, it’s much easier to remember the domain name “masterdaweb.com” than the corresponding IP address, which is a series of numbers.
When you type a domain name into your browser, such as “masterdaweb.com”, the browser sends a query to the DNS server, which is responsible for translating the domain name into an IP address. The DNS server then responds with the correct IP address, allowing the browser to connect to the website’s hosting server.
How does DNS work?
Below are the basic steps of how DNS works:
- The user types a domain name into their browser.
- The browser sends a DNS resolution query to the local DNS server.
- The local DNS server checks that it already has a copy of the DNS resolution information in its cache. If it does, it returns the DNS resolution information to the browser.
- If the local DNS server doesn’t have the information in its cache, it sends a DNS resolution query to a higher-level DNS server, such as the root servers.
- The top-level DNS server queries the next level of DNS servers, which may be the authoritative servers for the domain name.
- If the authoritative servers for the domain name have the DNS resolution information, it will be returned to the top-level DNS server and finally to the local DNS server and browser.
- If the authoritative servers for the domain name don’t have the DNS resolution information, they will return an error message to the top-level DNS server and, eventually, to the browser.
The DNS resolution process can involve several different DNS servers, but is generally very quick. Once the browser has the site’s correct IP address, it can connect to the site’s hosting server and load the web page content for the user.
DNS is essential for Internet browsing and network security. However, it is important to ensure that DNS servers are configured correctly and protected against security threats.
Master da Web, your Cloud solution! ☁️
