Domain name resolution is the process by which domain names are translated into IP addresses. This process is necessary to be able to access web pages and other resources on the Internet. Domain name resolution works in the following way:
1. The user enters a domain name into their web browser.
2. The browser sends a request to a recursive DNS resolver, which is an intermediate server that helps to resolve domain names.
3. The recursive DNS resolver first checks its local cache to see if the domain name has been recently resolved. If it has, the IP address is returned to the browser.
4. If the domain name is not in the local cache, the recursive DNS resolver sends a request to a root DNS server.
5. The root server responds with the IP address of the top-level domain server for the domain name.
6. The recursive DNS resolver then sends a request to the top-level domain server, which responds with the IP address of the authoritative DNS server for the domain.
7. The recursive DNS resolver sends a request to the authoritative DNS server, which responds with the IP address of the server hosting the website or resource.
8. The IP address is returned to the browser, which can then connect to the server and retrieve the web page or resource.
Overall, domain name resolution is a complex process that involves several steps and multiple servers. However, the process happens quickly and seamlessly behind the scenes, allowing users to access the Internet without having to worry about the technical details.
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