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After class questions 1-5 1. How many layers are the network communication protocols divided into? What are the problems solved by each layer? >>OSI layer 7 protocol   OSI seven layer network modelfunctionapplication layerDirectly provide services for the user's application processPresentation layerProvides a standard format for net ...

The location is different, and the ip address is different Network protocol is the collection of a group of network rules, which is the agreement or standard we abide by together. Common protocols TCP: UDP: HTTP: Port number: uniquely identifies an application (process) on a host Why layering: The data link layer solves the transmission be ...

Source code:      NetToolsTest For other QT Widge articles, please click here:      QT Widget learning notes Sister articles:      Introduction and practice of Qt TCP/UDP network protocol (I) TCP communication This article is just the simplest introductory study, which can be ...

Java learning punch in: day 33 Java cultivation program (punch in day 32) Simplified chat [70 lines of code to realize text chat between two devices] ##Simplified version - chat between two computers For ease of understanding, let's simplify Socket communication A large part of yesterday's project is interface design and event moni ...

1. Briefly describe osi seven layer model and TCP/IP five layer model OSI reference model The Open System Interconnection Reference Model is a conceptual model proposed by the international organization for standardization. It divides the computer network architecture into the following seven layers: Application Layer: as a window for ...

Come on, this blog today teaches you how to write an online chat room by hand, and you can't cut me off. 1. Functional Design Achieve online communication between two users without group functionality. Keyboard entry console output 2. Technical Analysis The following analysis applies to both UDP and TCP First, we can easily write out t ...

csdn online learning course, course consultation and Q & A and new course information: QQ communication group: 422901085 for course discussion android cross process communication practice video course (add group to get preferential) 1. Background of epoll First, understand two basic concepts: blocking IO: The blocking mode of socket mean ...

Network programming Network programming is a program that realizes the communication between two computers under a certain protocol. 1. What is a computer network The computers distributed in different geographical areas and special external equipment are interconnected by communication lines to form a large-scale and powerful ne ...

ESP-NOW introduction ESP-NOW is a protocol developed by Espressif, which allows multiple devices to communicate with each other without using Wi Fi. The protocol is similar to a low-power 2.4GHz wireless connection. Pairing between devices needs to be completed before communication. After pairing, the connection is secure, point-to-point, ...

Network file system (NFS) Introduction to nfs NFS (Network File System), namely Network File System, is one of the file systems supported by FreeBSD. It allows computers in the network to share resources through TCP/IP networkIn NFS applications, local NFS client applications can transparently read and write files on remote NFS servers, just ...