The TCP/IP protocol is a transport layer protocol that mainly addresses how data is transmitted over the network, while HTTP is an application layer protocol that mainly deals with how to package the data. Regarding the relationship between TCP/IP and HTTP protocols, there is a relatively easy-to-understand introduction on the internet: “When we transmit data, … Read more
Cisco Certification | Huawei Certification | IT Technology | Network Engineer 👇3000 people technical exchange QQ group, remark 【official account】 for faster access In today’s information society, network communication has become the backbone of global information exchange. The TCP/IP model, as the core protocol of internet communication, not only reflects the inevitable choice of technological … Read more
1. Overview of Computer Networks 1.1 Classification of Computer Networks According to the scope of the network: Wide Area Network (WAN), Metropolitan Area Network (MAN), Local Area Network (LAN); According to the users of the network: Public network, Private network. 1.2 Hierarchical Structure of Computer Networks Comparison of the TCP/IP four-layer model and the OSI … Read more
Preface Network Protocols When we connect to the internet using our mobile phones, we use many network protocols. Starting from connecting the phone to WiFi, the 802.11 (i.e., WLAN) protocol is used to access the network; the phone automatically obtains network configuration using the DHCP protocol, and only after obtaining the configuration can the phone … Read more
Introduction to HTTP 1. HTTP Versions Since the invention of the HTTP protocol, it has undergone several version modifications, namely <span>HTTP/0.9</span>, <span>HTTP/1</span><span>.0</span>, <span>HTTP/1.1</span> and <span>HTTP/2</span>. Currently, the main version in use is <span>HTTP/1.1</span>, which is the focus of this article. 2. TCP/IP Protocol Before learning about the HTTP protocol, let’s first understand the TCP/IP protocol. … Read more
What Is a Communication Network There is always a network around us, such as telephone networks, telegraph networks, television networks, computer networks, etc.; even within our bodies, there are many network systems, such as the nervous system and the digestive system. The most typical representative is the computer network, which is a combination of computer … Read more
Modbus Simulation – Essential Skills for Beginners In the field of industrial automation, we often encounter various communication protocols, such as Profibus, ControlNet, Ethernet, Canopen, and Modbus. Among these, the Modbus protocol is the most widely used, free, and open-source, and is supported by almost all manufacturers’ industrial equipment. When working on engineering projects, we … Read more
Search WeChat Technical Training Introduction Modbus was developed by MODICON in 1979 and is a standard for industrial fieldbus protocols. In 1996, Schneider Electric launched the Modbus protocol based on Ethernet TCP/IP: ModbusTCP. The Modbus protocol is an application layer messaging protocol that includes three types of messages: ASCII, RTU, and TCP. The standard Modbus … Read more
↓Recommended Follow↓ Network Models: Common models include the OSI network model, TCP/IP network model, and the five-layer protocol network model: The OSI seven-layer network model splits the application layer of the traditional five-layer TCP model into the application layer, presentation layer, and session layer. Application Layer: Responsible for providing a unified interface for applications. Presentation … Read more
In terms of Ethernet interface connections, there are usually two solutions: one is when the terminal product has a system running, such as Android systems on chips like RK3399, Linux systems on chips like i.MX6, and RTOS systems on low-end ARM chips like STM32F107. These chips have integrated Ethernet MACs, and by adding simple PHY … Read more