How a single IP address can simultaneously live on hundreds of machines across the globe — and why that’s one of the internet’s most elegant tricks.
Imagine you’re in Tokyo, trying to reach a DNS server located in New York. Every query you make travels across the Pacific Ocean, endures 150+ milliseconds of latency, and returns the same way. For a single request, that’s tolerable. For millions of users doing it constantly, it’s a serious bottleneck.
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(more…)How the backbone of the web went from a simple text protocol to a blazing-fast, multiplexed, encrypted-by-default communication layer.
You use it every time you open a browser. You’ve probably never heard of it. And when it breaks, the internet breaks.
The internet is not a single network. It’s a vast, chaotic collection of tens of thousands of independent networks — run by ISPs, universities, corporations, cloud providers, and governments — all somehow agreeing to talk to each other. What makes this possible? A single routing protocol called BGP: the Border Gateway Protocol.
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