[Question:] What exactly are the three protocols: NetBEUI, IPX/SPX, and TCP/IP? Especially the first two, sometimes they are installed and sometimes not. Why is that? What are the differences and unique features? When must they be installed? [Answer:] Many users have asked this question. Here, I have researched and compiled relevant information to provide a … Read more
Image source: Internet In the vast world, humans convey information and communicate with each other through language and actions. Just as communication occurs between people, the interconnection of computers also requires adherence to certain rules, known as network protocols. The protocol family currently adopted by the global Internet is the TCP/IP protocol family. IP is … Read more
Fact One: File Descriptor Limits Friends who write network server programs in Linux surely know that each TCP connection occupies a file descriptor. Once this file descriptor is exhausted, a new connection attempt will return the error “Socket/File: Can’t open so many files”. At this point, you need to understand the operating system’s limit on … Read more
Search on WeChat Technical Training The ping command is the most frequently used network command in projects, and we usually use its basic functions. Today, let’s take a detailed look at the 7 basic uses of the Ping command. 1. Basic of Ping Command 2. Usage of ping -t 3. Usage of ping -a 4. … Read more
In computer networks, to share resources and exchange data in an orderly manner, some pre-agreed rules must be followed. These standards or agreements established for data exchange in the network are called network protocols, abbreviated as protocols. To enable efficient transmission between computers, a layered approach is adopted, similar to how people collaborate to complete … Read more
1. Phenomenon Description: The user cannot connect to the network, and the local connection icon in the system tray shows an exclamation mark indicating that the IP is restricted. 2. Cause Analysis 1. Many users do not understand TCP/IP and do not know how to set parameters such as “IP address”, “subnet mask”, and “default … Read more
Click the blue text Follow us In daily life, when shopping online or mailing an item, we need to fill in both parties’ addresses, contact information, whether insurance is needed, and other details. Additionally, the courier company may have other regulations to be added to the purchase and mailing details. The purpose of this is … Read more
Source: https://juejin.cn/user/3931509313252552/postse In communication and IT work, networking is essential, and the most important protocol in the network is TCP. Whether in actual work or in written exams and interviews, you can’t escape TCP. I have read documents related to TCP in the RFC, examined the source code related to TCP in Linux, and looked … Read more
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
Introduction Network Protocols When we connect to the internet using our mobile phones, we utilize many network protocols. Starting from the connection to WiFi, we use the 802.11 (i.e., WLAN) protocol to connect to the network; the phone automatically obtains network configuration using the DHCP protocol, and only after getting the configuration can the phone … Read more