What is DNS? How does it work?
DNS plays an important role in the internet infrastructure as it allows users to access websites and online services using easy-to-remember domain names.
DNS (Domain Name System) is a system used to convert domain names (such as www.hubme.id) into IP addresses that computers can recognise.
The way DNS generally works is as follows:
- When a user enters a domain name into a browser, the browser will look for an IP address that corresponds to that domain name.
- The browser will first check its local cache to see if there is already information about the domain name.
- If there is no information in the local cache, the browser will send a request to the nearest DNS server.
- The DNS server will look for information about the domain name in its DNS database. If the information is available, the DNS server will send the corresponding IP address back to the browser.
- If the information is not found in the closest DNS server, the DNS server will perform a lookup to other DNS servers until the information is found.
- Once the browser receives the IP address from the DNS server, it will use the IP address to access the website requested by the user.
Thus, DNS allows users to access websites and online services using easy-to-remember domain names, without the need to memorise long and complicated IP addresses.