What Is My Server DNS?


Scott Campbell

What Is My Server DNS?

If you have ever wondered what exactly is the Server DNS (Domain Name System) and how it works, you have come to the right place. In this article, we will delve into the details of Server DNS and its importance in the world of web hosting.

The Basics of DNS

DNS is like a phonebook for the internet. When you type a website address in your browser, such as www.example.com, your computer needs to know the IP address associated with that domain name to establish a connection. This is where DNS comes in.

DNS servers act as intermediaries between your computer and web servers. They translate human-readable domain names into machine-readable IP addresses. By doing so, they enable your computer to locate and connect to the correct web server.

Types of DNS Servers

There are several types of DNS servers, each serving a specific purpose:

  • Recursive DNS Servers: These servers perform all the necessary steps to find a website’s IP address on behalf of your computer. They start from root-level servers and work their way down until they find the requested information.
  • Root Nameservers: These servers are responsible for providing information about top-level domains (TLDs) like .com, .org, or country-specific TLDs like .uk or .ca.
  • TLD Nameservers: These servers store information about specific TLDs and can direct queries to authoritative nameservers for further resolution.
  • Authoritative Nameservers: These are the final authority on domain names and hold specific information about each domain name’s IP address.

How DNS Works

When you enter a domain name in your browser, your computer sends a DNS query to your configured DNS server. The server then follows a series of steps to resolve the domain name:

  1. Step 1: The DNS resolver checks its cache for any previously resolved IP addresses for the given domain. If found, it returns the IP address directly.
  2. Step 2: If the IP address is not available in the cache, the resolver sends a query to the recursive DNS servers.
  3. Step 3: The recursive DNS server starts by querying one of the root nameservers to find information about the TLD nameserver responsible for the requested domain.
  4. Step 4: The recursive DNS server forwards the query to the appropriate TLD nameserver.
  5. Step 5: The TLD nameserver responds with information about the authoritative nameserver for the requested domain.
  6. Step 6: The recursive DNS server sends a query to the authoritative nameserver for the IP address of the requested domain.
  7. Step 7: The authoritative nameserver responds with the IP address, which is then passed back to your computer via recursive DNS servers and finally reaches your browser.

The Importance of Server DNS

DNS plays a crucial role in ensuring that websites are accessible across the internet. It acts as an essential directory service that allows users to access websites by their memorable domain names rather than complex IP addresses.

In addition, Server DNS provides flexibility for website owners by allowing them to change their web hosting provider or IP address without affecting users’ ability to access their websites. By simply updating the DNS records, website owners can redirect traffic to a new server or location.

In conclusion, Server DNS is a fundamental component of the internet infrastructure. It enables the translation of domain names into IP addresses, allowing computers to locate and connect to web servers. Understanding how DNS works is essential for website owners, IT professionals, and anyone interested in the functioning of the internet.

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