In network technology, a port generally has two meanings: first, it refers to the physical interface (hardware) between computers and other devices. For example, interfaces like RJ-45 ports and SC ports used to connect other network devices such as switches and routers. Second, it refers to the logical virtual ports (software), which typically refer to … Read more
Fundamentals of Networking 1、OSI（Open System Interconnection）Open System Interconnection Model Seven-layer model: Layer 1: Physical Layer : Transmission of raw bit streams over mechanical, electronic, and timing interfaces communication channels Layer 2: Data Link Layer: Physical addressing, while transforming the raw bit stream into logical transmission lines Layer 3: Network Layer: Controls the operation of subnets, … Read more
Author: wuchao226 Link: https://www.jianshu.com/p/8e35c3883035 OSI Seven-Layer Model OSI adopts a layered structured technology, which is divided into seven layers: Physical Layer, Data Link Layer, Network Layer, Transport Layer, Session Layer, Presentation Layer, Application Layer. TCP/IP Model The OSI model is relatively complex and academic, so the TCP/IP model we actually use is divided into 4 … 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
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
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TCP/IP Model TCP and UDP Why TCP Requires Three-Way Handshake Why TCP Requires Four-Way Teardown The Process of a Web Page Requesting a URL How DNS Works Principle of HTTPS Encryption 1. TCP/IP Model Application Layer: Specifies the data format for application programs and handles specific application details. Transport Layer: Specifies ports for specific applications … Read more
Finally, I have come to the TCP protocol, which is the most important and exciting part of TCP/IP detailed explanation, and it requires significant effort to read. Brief Introduction TCP and UDP are at the same layer— the transport layer. However, the most significant difference between TCP and UDP is that TCP provides a reliable … Read more