Programmer Think

The prompt Address already in use must have been encountered. How can we quickly find and solve the problem? Here are several postures to learn about When troubleshooting network connectivity or application specific problems, one of the first things to check should be which ports are actually used on the system and which application is liste ...

1, Brief description of TCP protocol 1. Introduction Transmission Control Protocol (TCP) is a connection oriented, reliable and byte stream based transport layer communication protocol, which is defined by IETF RFC 793. TCP is designed to adapt to the hierarchical protocol hierarchy supporting multi network applications. Paired processes ...

Qt Network (I) tcp server Introduction TCP TCP protocol, transmission control protocol, is an underlying network protocol for data transmission. Many Internet protocols, including FTP and HTTP, are based on TCP protocol. TCP is a reliable transmission protocol for data flow and connection. QTcpSocket class provides an interface for TCP, which ...

PyQt5 provides QUdpSocket and QTcpSocket classes to implement UDP and TCP transmission protocols respectively. Both protocols can be used to create network client and server applications. The former (UDP) sends data from one host to another in the form of packets. It is only responsible for sending, but does not care whether the sending is succ ...

I Linux IP address configuration Acquisition method - automatically acquire and specify IP The first method: automatic acquisition Note: after logging in, set automatic ip acquisition through system settings Features: linux will automatically obtain ip after startup. The disadvantage is that the ip address automatically obtained each tim ...

Network management of [Linux learning] practical series Let's start with some simple and common ones, but note that the simple and common ones should also be used skillfully ping As we all know, ping is used to test whether a host can communicate with each other. The output of a ping command is as follows: root@***:~# ping 127.0.0.1 PING 1 ...

1. Come straight to the point and explain the phenomenon (1) It is known that there is a PC of Linux system and a PC of Windows system in the network environment. Before connecting PPPoE, the IP addresses of relevant physical network cards are as follows: (2) If a PPPoE server has been set up in the current network environment, Linux and Win ...

Step by step, I learned the knowledge of JUC concurrent programming before, and now I finally come to Java IO network programming. It's difficult. 1, BIO introduction Introduction: with the development of technology, two or more programs must interact, so it provides an end-to-end communication, which is equivalent to a encapsulation of the ...

Introduction to AIO model AIO (Asynchronous I/O) asynchronous non blocking model supports AIO since java jdk.17. The AIO model needs the support of the operating system. The biggest feature of AIO is asynchronous capability, which works on socket and I/O. Different from the NIO model, a read-write operation is taken as an example, just ...

1.3 DNS processing module dnspython dnspython yes python Implementation of a DNS Toolkit, which supports almost all record types, can Used for query, transmission and dynamic update ZONE Information and support TSIG(Transaction signature) validation message and EDNS0(extend DNS). In terms of system management, we can use its query function ...