The transition from HTTP/2 to HTTP/3 is a massive architectural shift. Instead of relying on TCP, HTTP/3 utilizes QUIC, a multiplexed transport protocol built on UDP.
Why UDP Matters
TCP suffers from "head-of-line blocking." If one packet is lost, the entire stream waits. QUIC solves this, making web browsing incredibly fast on mobile connections where packet loss is common.
How to Enable It
Most modern CDNs (like Cloudflare) and cutting-edge web servers (like LiteSpeed) support HTTP/3 out of the box. Ensure your SSL is active, and toggle the protocol in your server settings.
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