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How the Internet Translates a URL Into a Webpage You Can See

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Every time a user types a web address and hits Enter, a multi-step process involving DNS, IP addresses, and data packets begins almost instantly. The Domain Name System (DNS) acts as the internet's phonebook, converting human-readable domain names like github.com into numerical IP addresses that computers use to locate servers. Data is not sent as one large file but broken into smaller packets, each routed independently through a network of interconnected computers before being reassembled at the destination. IPv6 was introduced to expand the available pool of IP addresses as the number of internet-connected devices continues to grow. Understanding these foundational technologies — DNS resolution, IP addressing, and packet routing — is considered essential knowledge for backend developers building web applications.

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