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Deep Dive into HTTP/3: The Future of the Web

Introduction HTTP/3 is the latest evolution of the HTTP protocol, designed to overcome limitations in HTTP/2, particularly TCP-level Head-of-Line (HOL) blocking. By leveraging QUIC (Quick UDP Internet Connections), HTTP/3 enhances web performance, security, and reliability. In this blog, we will explore the architecture, benefits, and challenges of HTTP/3 in depth. Why HTTP/3? Understanding HTTP/2’s Limitations 1. TCP-Level HOL Blocking in HTTP/2 HTTP/2 uses a single TCP connection for multiplexing multiple streams. While this prevents application-layer HOL blocking, it still suffers from transport-layer HOL blocking due to TCP's sequential data transmission.

Mar 17, 2025 - 17:57
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Deep Dive into HTTP/3: The Future of the Web

Introduction

HTTP/3 is the latest evolution of the HTTP protocol, designed to overcome limitations in HTTP/2, particularly TCP-level Head-of-Line (HOL) blocking. By leveraging QUIC (Quick UDP Internet Connections), HTTP/3 enhances web performance, security, and reliability. In this blog, we will explore the architecture, benefits, and challenges of HTTP/3 in depth.

Why HTTP/3? Understanding HTTP/2’s Limitations

1. TCP-Level HOL Blocking in HTTP/2

HTTP/2 uses a single TCP connection for multiplexing multiple streams. While this prevents application-layer HOL blocking, it still suffers from transport-layer HOL blocking due to TCP's sequential data transmission.

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