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background When ifconfig checks the network interface information, there are network interfaces eth0 and eth1. How are the name drivers of the two ports allocated? How to change the standard eth1 and eth0 to LAN and WAN (or users can define their own names). When ifconfig is displayed again, LAN and WAN network cards are displayed. The pr ...

Personal blog address 1, Experimental content Simulate process synchronization and mutual exclusion in the operating system. 2, Experimental purpose Familiar with the definition and physical meaning of critical resources, semaphores and PV operationUnderstand the method of process communicationMaster the knowledge of process mutual exclusio ...

PXE batch deployment system 1, What is PXE Preface introduction: PXE pre boot execution environment (PXE), also known as pre execution environment, provides a mechanism to boot a computer using Network Interface. This mechanism allows the computer to start without relying on local data storage devices (such as hard disks) or locally insta ...

Why use CDN When more and more components are introduced, use the app packaged by webpack JS file is easy to become too large, which is very unfriendly to the first screen loading. The JS code using the third-party resources of CDN will no longer be packaged into the JS package of local services. Reduce the volume of local JS package and imp ...

1, Project introduction UDP network broadcast communication is realized by using QUdpSocket class. Its principle is shown in the figure below. The working principle of UDP is: the UDP client sends a certain length of request message to the UDP server. The message size limit is related to the protocol implementation of each system, but it ...

TCP protocol stack ESP uses lwIP as embedded TCP/IP protocol stack support lwIP is a set of IP protocol stack implemented in C at MCU level, which can run on bare metal / RTOS / Embedded Linux. Lexin provides relevant porting packages for ESP32 For relevant contents, please refer to LwIP library functions, which are supported in LwIP and ESP ...

1, server side configuration Install the time synchronization server. There are no special requirements and there is no need to change the configuration. Server ip: 192.168.91.159 [root@www zoneinfo]# yum -y install ntp [root@www zoneinfo]# systemctl start ntpd #Change the configuration file and add the following two items [root@www ntp]# vi ...

1, Working principle of LVS-DR 1. Packet flow analysis (1) The client sends a request to the director server (load balancer), and the requested data message (the source IP is CIP and the target IP is VIP) reaches the kernel space. (2) The director server and Real Server are in the same network, and the data is transmitted through the two-lay ...

reference material https://blog.csdn.net/PorkBird/article/details/113727633https://www.bilibili.com/video/BV1Kb411W75N?p=636&spm_id_from=pageDriver 1. Overview of network programming Java is a language on the Internet. It provides support for network applications at the language level. Programmers can easily develop common network a ...

Introduction to network communication According to the number of recipients, network data transmission can be divided into the following three ways. ·Unicast: provides point-to-point communication. The data sent by the sender each time has a unique destination address and is received by only one receiver. ·Broadcast: the data ...