When you type FQDN in your browser, it checks host files already available in your system.There are 13 Root Name Servers across globe, responsible for directing requests to appropriate TLD Server. Recursive Name Server performs Full Name Resolution. Purpose of Caching Name Server is to store known domain names for certain amount of time (similar to caching in data storage). There are 5 types of Name Servers –Ĭaching and Recursive Name Servers are generally provided by Internet Service Providers.
To resolve such DNS queries, there are Domain Name Servers built across world that takes your DNS look-up request and resolve it. While you enter URL (this URL is known as FQDN – Fully Qualified Domain Name) into browser, DNS takes care of looking at actual IP address associated with website. Domain Name System is method of resolving human-understandable URLs into their respective IP addresses. With growth of internet at a rapid pace came issue of remembering websites with their IP Address (not an issue if superhuman or bot pretending to be human). There are 2 32 IP Addresses (approximately 4, 294, 967, 296).
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