DNS

DNS is a system that translates human-readable domain names into machine-understandable IP addresses. It enables users to access websites and services on the internet by using easy-to-remember domain.

What is DNS and how does it work?

DNS stands for Domain Name System. It is a hierarchical decentralized naming system that translates human-friendly domain names like www.google.com into IP addresses like 74.125.224.72 that machines can understand and use to communicate with each other over the internet.

When a user enters a URL into their web browser, the browser sends a request to a DNS resolver to translate the domain name into its corresponding IP address. The resolver checks its cache to see if it has the IP address already. If it doesn't, it forwards the request to a series of DNS servers in a hierarchical order until it reaches the authoritative DNS server for the domain.

The authoritative DNS server returns the IP address to the resolver, which caches it for future use and returns it to the user's web browser. This process is known as a DNS lookup and happens behind the scenes without the user's knowledge.

DNS is critical to the functioning of the internet as it enables users to access websites and services using human-readable names rather than complex IP addresses. It also allows domain owners to change the IP address associated with their domain without affecting the user experience.

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