For laymen, you can simply understand ports as the exit for communication between a computer and the outside world. However, in network technology, ports generally have two meanings: (1) Ports in Hardware Devices Such as interfaces in switches and routers used to connect other devices. (SC ports, etc.) (2) Ports in TCP/IP Protocols Such as … Read more
Search on WeChat Technical Training There are various communication methods between Siemens WINCC and Siemens PLC. Below are two commonly used communication methods. 1. Using a standard network card to communicate with the PLC via TCP/IP. The prerequisite for connecting WINCC with the PLC system through Ethernet is that the PLC system is configured with … Read more
Nowadays, whether in security engineering or weak current engineering, the connection with networks is becoming increasingly close. Among the basic knowledge of networks, the ping command is the most frequently used in projects. Generally, we only use its basic functions. Today, let’s take a detailed look at the 7 basic uses of the Ping command, … Read more
A Comprehensive Explanation of Computer Network Principles Introduction Hello everyone, I am Tai Dou Xian Ruo Ru, a content creator focused on explaining technology in simple terms. This time I will share knowledge related to the principles of computer networks. I believe the content of this article is already very easy to understand, and I … Read more
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1. Overview of Cybersecurity 1.1 Definition Information Security: The technical and managerial security measures established and adopted for data processing systems, protecting computer hardware, software, and data from accidental and malicious destruction, alteration, and disclosure. Cybersecurity: Prevent unauthorized users from accessing information Prevent unauthorized attempts to destroy or modify information 1.2 Characteristics of Information Security … Read more
Internet Internet The Internet is the largest network in the world today, known as the “network of networks”. It is a massive network that interconnects all other networks. The components of the Internet: Edge part: Host Core part: A large number of networks and the routers connecting these networks (this router is not the one … Read more
No matter how one’s mindset changes, technology remains the most powerful weapon in the hands of network engineers! Today’s technical points are explained from small details, which can help beginners solve basic literacy issues and allow experienced network engineers to “review and learn anew”. Let’s take a look together~ 01 LAN (Local Area Network) Typically … Read more
Author: Shui De Original: http://blog.csdn.net/jxh_123/article/details/40316081 1. OSI, TCP/IP, and Five-Layer Protocol Architecture OSI Layers (7 layers): Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, Application Layer. TCP/IP Layers (4 layers): Network Interface Layer, Internet Layer, Transport Layer, Application Layer. Five-Layer Protocol (5 layers): Physical Layer, Data Link Layer, Network Layer, … Read more
2024 Tianjin Adult Higher Education Entrance Exam Computer Preparation Plan Summary of Chapter Key Points, Please Click Below 👇 [Adult Higher Education Preparation] Key Points for Chapter One of Computer Fundamentals [Adult Higher Education Preparation] Key Points for Chapter Two of Computer Fundamentals [Adult Higher Education Preparation] Key Points for Chapter Three of Computer Fundamentals … Read more