What Is DNS Server How It Works?
The Domain Name System (DNS) is a fundamental component of the internet that allows us to access websites by their domain names, such as www.example.com, instead of remembering the IP addresses associated with them. In this article, we will explore what a DNS server is and how it works.
The Domain Name System is like a phonebook for the internet. It translates human-readable domain names into machine-readable IP addresses. When you type a domain name into your web browser, it needs to know the IP address of that domain in order to establish a connection.
Think of it this way: When you want to call someone on your phone, you don’t need to remember their phone number exactly. You can simply search their name in your contacts and dial their number. The DNS server works similarly by providing the IP address associated with a given domain name.
What Is a DNS Server?
A DNS server is responsible for storing and managing a database of domain names and their corresponding IP addresses. When your computer or device needs to connect to a website, it sends a request to the DNS server, asking for the IP address associated with the domain name you entered.
There are different types of DNS servers, including authoritative DNS servers and recursive DNS servers. Authoritative servers hold information about specific domains and provide answers when queried about those domains. Recursive servers act as middlemen between client devices and authoritative servers, resolving queries on behalf of clients.
How Does a DNS Server Work?
The process starts when you enter a URL into your web browser:
- Your computer checks its local cache for the corresponding IP address.
- If the IP address is not found in the cache, your computer sends a request to the configured DNS server.
- The DNS server checks its own cache for the IP address.
- If the IP address is still not found, the DNS server sends a request to other DNS servers on behalf of your computer.
- This process continues until a DNS server with the requested IP address is found.
- The IP address is then returned to your computer, which can now establish a connection to the desired website.
It’s important to note that DNS servers maintain caches to improve performance and reduce network traffic. The cached information can be used for subsequent requests, eliminating the need to query other servers every time.
The Domain Name System (DNS) plays a crucial role in translating domain names into IP addresses, allowing us to access websites easily. DNS servers store and manage this information, ensuring that our devices can connect to the correct web addresses. By understanding how DNS works, we gain insight into an essential component that makes browsing the internet possible.