1. Technical Foundations and Overview Q: What is HTTP? A: HTTP is a standard TCP for requests and responses between client and server. It is actually built on top of TCP. When we open the Baidu webpage, it looks like this: https://www.baidu.com The extra ‘S’ actually stands for TLS/SSL. We won’t explain that here, so … Read more
🌐 Complete Guide to Network Protocols: In-Depth Conversations from HTTP Long and Short Connections to TCP-UDP This article adopts a conversational format, through the Q&A of Xiao Li and Xiao Wang, to explain core concepts such as network protocols and long/short connections in a simple and accessible manner, helping readers establish a complete knowledge system … Read more
What is HTTP? Basic Information HTTP (HyperText Transfer Protocol) is an application layer protocol used for distributed, collaborative, and hypermedia information systems. Development History The development of HTTP began in 1989, initiated by Tim Berners-Lee at the European Organization for Nuclear Research (CERN). The standardization was coordinated by the World Wide Web Consortium (W3C) and … Read more
In the previous article, “30-Day Challenge: Linux Server Program Development: Starting from Sockets,” we implemented a client that initiates a socket connection and a server that accepts a socket connection. However, for functions like socket, bind, listen, accept, and connect, we assume the program runs perfectly without any exceptions, which is clearly impossible. No matter … Read more
In the field of industrial automation, the MODBUS TCP protocol is widely popular due to its simplicity and broad applications. However, some issues are inevitable during its use. Today, we have compiled some common questions to assist you in your debugging and usage! 🚀1. What is MODBUS TCP?MODBUS TCP is a communication protocol based on … Read more
Practical Guide to Network Parameter Tuning in High-Concurrency Linux Scenarios Table of Contents • Practical Guide to Network Parameter Tuning in High-Concurrency Linux Scenarios • • Introduction • 1. Background: When Concurrent Connections Encounter Performance Bottlenecks • • 1.1 Case Environment • 1.2 Initial Parameter Analysis • 2. In-Depth Diagnosis: Connection Status and Kernel Parameters … Read more
Fundamentals of Network Programming in C: Socket Programming In modern computer science, network programming is an important field. As a low-level language, C provides powerful capabilities for network programming. This article will introduce the basics of socket programming in C, helping beginners understand how to perform simple network communication using C. What is a Socket? … Read more
HTTP Request Process A complete HTTP request process includes DNS requests and responses, domain name resolution, TCP connection, three-way handshake, server response to the HTTP request, browser parsing and rendering of HTML, and finally, the server closes the TCP connection with a four-way handshake. Step 1: DNS Resolution The local DNS uses recursive queries to … Read more
Modbus TCP Master toSNMP – ADFweb Gateway Converter–Guangzhou Xinyu IoT Author: Zou Wuyi Mobile185-020-77899 Email: [email protected] 1 Features: HD67166 – A1 is aModbus TCP Master/ SNMP proxy converter. It has the following features: • Read operation supports a maximum of 1024 bytes, write operation supports a maximum of 1024 bytes; • Isolation between power supply … Read more
Author 1 Basic Product Setup 1. To log into the gateway’s configuration page, you need to change your computer’s local network card IP address to 192.168.127.X The default factory IP address of the MGate 5121 is 192.168.127.254/24 The gateway’s default Ping service is disabled, so the factory-set IP address cannot be pinged, as shown in … Read more