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summary Java and C#, can use UDP and TCP protocols for network communication. This chapter only describes the basic use of UDP and TCP. Compared with various standard / non-standard TCP, ModbusTCP (occupying 502 port) and lower computer custom network communication protocols required when writing the upper computer, Java TCP and UDP progra ...

1. Preface I finally don't need to debug a hardware device and install an APP. If I download someone else's network debugging assistant in the APP store and have advertisements, I might as well write a relatively complete network debugging assistant directly. At present, the supported functions include tcp client and server, udp, low-power Blu ...

1. Agreement: an agreement. 2. Protocol layering: (1) OSI (open system interconnection) seven layer model (2) TCP/IP five layer model (3) TCP/IP four layer model Layer namefunctionRelated agreementsapplication layerResponsible for communication between applications HTTP SSH DNS Display layerConvert the network datagram into the package req ...

UDP transport 1: Establish udp socket service 2: Receive data through receive method 3: Store the received data in the packet object 4: Analyze the received data through the function of packet object 5: Resources can be closed client /* Add feedback according to our normal thinking, but there is no response. Why The reas ...

1.UDP broadcast. The client opens a port to listen to data. The server specifies the port to send data, and the client can receive the data. The broadcast address bound by the server is 255.255.255.255 Client listening: public class BroadcastClient { private int MessageIndex = 0; private int port = 6787;//Data listening binding port ...

UDP communication principle: UDP protocol is an unreliable network protocol. It has a Socket object at both ends of the communication, but these two sockets are only the objects to send and receive data Both sides of communication based on UDP protocol have no so-called concept of client and server The datagram Socket class provided by Java i ...

catalogue 1, There are two main problems in network programming: 2, Two elements in network programming: 3, Communication element 1: IP and port number 4, Realize TCP network programming Example 1: the client sends information to the server, which displays the information on the console. Example 2: the client sends a file to the server, w ...

UDP UDP protocol is an unreliable network protocol. It establishes a Socket object at both ends of the communication, but these two sockets are only the objects to send and receive data. Therefore, for both sides of communication based on UDP protocol, there is no so-called concept of client and server Java provides DatagramSocket class as a ...

1, Network programming communication protocol-- UDP protocol. 1. What are the UDP protocol features? The full name of UDP protocol is "User Data Protocol / user data packet protocol". This protocol is based on connectionless communication, so there are no connect() and accept() in the code of UDP protocol. 2. UDP protocol design ste ...

Network programming Overview of network programming Computer network: connect computers with independent functions distributed in different regions with lines through communication equipment to realize the sharing of information and resources. Network programming: Java language supports network. Java encapsulates the implementation detai ...