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Tencent Cloud Developer
Tencent Cloud Developer
Jul 20, 2022 · Fundamentals

Deep Dive into the TCP Three‑Way Handshake from the Linux Kernel Perspective

The article explains how the Linux kernel implements the TCP three‑way handshake, detailing server listen queue allocation, client connect port selection and SYN transmission, SYN‑ACK processing, state transitions, request‑socket management, full‑connection queue handling, and the final accept call, plus tuning tips.

CONNECTLinux KernelSocket Programming
0 likes · 19 min read
Deep Dive into the TCP Three‑Way Handshake from the Linux Kernel Perspective
360 Tech Engineering
360 Tech Engineering
Jan 18, 2019 · Fundamentals

Detailed Explanation of the MQTT CONNECT Packet and Its Fields

This article provides a comprehensive overview of the MQTT CONNECT packet, covering its fixed and variable header structures, protocol name, level, flags, keep‑alive settings, session handling, will message behavior, payload composition, and the server's validation and response process.

CONNECTIoTMQTT
0 likes · 11 min read
Detailed Explanation of the MQTT CONNECT Packet and Its Fields