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Article directory 1 Summary 2 Nmap action 3 common Nmap scanning instructions 4-port scan status The difference between TCP / IP and Http 6 use Nmap to detect the target open port 1 Summary One port is a very important thing in network application, equivalent to "door". What is port Po ...

Network programming Overview of network programming C/S and B/S C/S: The client server software structure, and the content that the service provider needs to prepare for the user's service Clients of major platforms Android iOS PC Windows Linux macOS QQ wechat Taobao JD sword and expedition Serv ...

Preface In the previous articles, PCA and SVD dimensionality reduction are shared. Today, another dimensionality reduction method, auto encoding, is shared. What is self coding Self coding is a data compression algorithm. The characteristics of encoder and decoder are as follows: For specific data Lossy compression Automatic learning The enco ...

This blog continues with the content in the previous blog. We have completed the modification of pose estimator in the front, that is to say, the ROS node provided by ORB-SLAM is used to realize online operation. Review our goal is to divide the mapping system into three nodes. The driving node is mainl ...

Original link: Tcpdump sample tutorial The main content of this paper is translated from <Tcpdump Examples>. Tcpdump is a powerful network packet capturing tool. It uses libpcap library to grab network packets, which is found in almost all Linux/Unix. Familiar with the use of tcpdump can help you to analyze and debug network data. Th ...

Original address: http://www.work100.net/training/java-serialization.htmlMore tutorials: Beam cloud - free course serialize Serial number Chapter in text video 1 Summary - 2 serialized objects - 3 Deserialize object - Please refer to the navigation above for reading 1. overview Java provides a mechanism of object serialization, in ...

1. Concepts Serialization of java objects means that the state of the object is converted into a byte stream that can be used later to regenerate the object in the same state.Object serialization is an implementation of object persistence, which converts object properties and methods into a serialized form for storage and transmission.Deserial ...

QuiteVersion For Android App detection of automatic updates Achieving results Add Dependency implementation 'com.xwdz:QuiteVersion:0.0.4' implementation 'com.xwdz:okHttpUtils:1.0.4' //Ignorable if dependent implementation 'com.squareup.okhttp3:okhttp:3.5.0' Characteristic Callable anywhere Suppo ...

TCP In order to facilitate the development of network applications, Berkeley University in the United States implements a kind of communication protocol Socket on Unix, which enables programmers to access TCP/IP conveniently; Use Socket of TCP/IP to communicate: The server program binds a socket ...

1. Development environment 1.Protocol version: 3.9 (latest available) Download Address 2.Protocol Protocol Version: 3 3. Ordinary java environment, source code is 2 classes. This is mainly about instant messaging using the native Java Socket API with its previous and back-end.Then binary data ( ...