Linux servers in a normal operating environment require precision, stability, efficiency, and security, and there are many tips for optimization. This article shares nine experiences for optimizing Linux servers, covering email servers, web servers, network configuration, memory management, and more. 1 Time Synchronization Servers in a normal operating environment require precise time. My email server’s … Read more
In the world of the Internet of Things, a typical network architecture is as follows: first, terminal devices or sensors collect signals or information. For devices that cannot connect to the internet or intranet, the sensors send the detected information to a gateway, which then sends the information to the server. Some devices, like smartphones, … Read more
Scan to FollowLearn Embedded Together, learn and grow together 【One Minute Talk on Embedded】, striving for brevity, aiming to finish reading in about one minute. Each article discusses a topic related to embedded systems, such as technology, workplace, learning methods, or a piece of code. If any friends want to express their opinions or want … Read more
Hello, electrical buddies! Today, I, Old Bai, will talk to you about the industrial network configuration of the Siemens S7-1200 PLC. This topic might sound a bit high-end, but don’t worry, follow me step by step, and I guarantee you can easily master the network communication of this “big guy”. Industrial Ethernet: The PLC’s “Social … Read more
A True Master Always Retains a Learner’s Heart! 1. Project Overview An enterprise-level IoT platform with open-source code for TCP/UDP/MQTT/HTTP. 2. Functional Features Notification Management: The notification management module is responsible for handling various notification messages generated within the IoT system, including device status changes, alarm information, and system events. This module can send, receive, … Read more
This article is a submission from a friend, Han Shijun. If you have excellent articles you would like to submit, feel free to contact me. Everyone relies on network communication every day, but how do these devices communicate with each other? I wrote this article so you can read it from thousands of miles away. … Read more
This article mainly reviews common attacks on TCP/IP, aiming to provide at least a basic understanding. Introduction Introduction 1 IP Spoofing What is IP? In a network, every device is assigned an address. This address is like a home address for a person, consisting of a number and a room. The number represents the subnet, … Read more
Click the “Yudaosource” above and select “Set as Star” Regardless of the old waves or the new waves? The waves that can roll are the good ones! Articles updated daily at 8:55, losing a bit of hair every day… Source Code Boutique Column Original | Java 2020 Super God Road, very intense~ Open-source projects with … Read more
Hello everyone, I amAms, Today I will talk about theTCP/IPThree-Way Handshake and Four-Way Teardown Process Analysis A virtual connection is established through a three-way handshake. 1. (Client) > [SYN] > (Server)IfClientandServerare communicating. WhenClientwants to communicate withServer,Clientfirst sends aSYN (Synchronize)marked packet toServerto request a connection.Note: A SYNpacket is a TCP packet with only the SYN flag … Read more
From: Juejin, Author: Ruheng Link: https://juejin.im/post/6844903490 595061767 1. TCP/IP Model The TCP/IP protocol model (Transmission Control Protocol/Internet Protocol) includes a series of network protocols that form the foundation of the Internet and is the core protocol of the Internet. The reference model based on TCP/IP divides the protocol into four layers: the Link Layer, Network … Read more