pgm multicast

The initial purpose of the packet broadcast method is to discover resources and reduce the amount of data interaction. But in fact, because of packet broadcasting, all hosts in the same network segment must complete data processing whether they are involved in broadcast applications or not. The broadcast UDP packets are processed layer by the system protocol stack of the host until the transport layer delivers them to the application process listening to the corresponding port or discards them.

Linux under TCP,UDP and broadcast and multicast Communications (Code encyclopedia) TCP, UDP, broadcast, multicast client server code link addresses are (for free): TCP Code: http://download.csdn.net/detail/huangminqiang201209/4860661UDP Code: http://download.csdn.net/detail/huangminqiang201209/4860665Broadcast code: http://download.csdn.net/detail/huangminqiang201209/4860672Multicast code: http://download

Basic multicast knowledge: Common IP communication is performed between a sender and a receiver. We call it point-to-point communication. However, for some applications, this point-to-point communication mode cannot effectively meet the needs of practical applications. For example, a digital teleconference system is composed of multiple venues. When participants in one of the venues speak, other venues are required to instantly obtain the content of t

How to configure cross-route access in NLB multicast Mode Some time ago, because a large number of shared files were required to be accessed, two servers were configured to improve the concurrent access speed, and NBL for windows was used for configuration. There were many configuration methods on the Internet. After configuration, multicast can be accessed locally, but it cannot be accessed from other netw

Source: "Bi Thing" data flow conversion-multicast, Union all, merge, merge JoinSet up test data:CREATE TABLEFactresults (NameVARCHAR( -), CourseVARCHAR( -), scoreINT )INSERT intofactresults (Name, Course, score)SELECT 'Zhang San' , 'language' , - UNION All SELECT 'Zhang San' , 'Mathematics' , the UNION All SELECT 'John Doe' , 'language' ,

Import Java.awt.dimension;import java.awt.textarea;import Java.awt.textfield;import Java.awt.toolkit;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.awt.event.windowadapter;import Java.awt.event.windowevent;import Java.io.ioexception;import Java.net.datagrampacket;import java.net.InetAddress; Import Java.net.multicastsocket;import Javax.swing.jbutton;import Javax.swing.jframe;public class Multicast extends JFrame imp

, fp)! = NULL) {Sendto (SOCKFD, Sendline, strlen (Sendline), 0, pservaddr, Servlen); Alarm (5); for (;;) {len = Servlen; n = recvfrom (SOCKFD, Recvline, MAXLINE, 0, preply_addr, len); if (n Iv. Multicast 1. Multicast address 1). IPV4 multicast address and IPV6 multicast address

I. Communication modes are classified in IPv4 networks. There are three communication modes available for the host: 1. unicast: data communication between a single host and a single host 2. Broadcast: A single host sends data packets to all hosts in the network. 3. Multicast: A single host sends data packets to a selected group of hosts for different unicast, broadcast, and multicast purposes, and uses diff

OneExperimental EnvironmentProgramming language:Java1.8(run in JVM (Java Virsual machine))Development tools:ECLIPCETest environment: LANIi. purpose of the experimentSociety has entered the information Age , and network technology is developing rapidly . A large number of applications rely on the ability to send the same information from one host to multiple hosts or from multiple hosts to multiple hosts, which can spread over the Internet by up to hundreds of thousands of , requiring higher ban

Scenario Description: A multicast address can contain multicast data, which is differentiated by different ports. Or a simple example.Host A to multicast address: 224.1.1.1 UDP data with send port 1025Host B to multicast address: 224.1.1.1 UDP data with send port 1026Host C Join the

asynchronous communication system, it also integrates distributed systems based on data communication. By providing message transmission and Message Queuing Models, it can expand inter-process communication in a distributed environment and support multi-communication protocols, languages, applications, hardware, and software platforms. Currently, popular mom middleware Products include IBM MQSeries and Bea.Messageq and activemq of Apache. Message-oriented middleware generally has two transmissi

1. repeatedly broadcast a piece of news.Code: Package mulsocket. frombook; Import java.net .*; Public class broadcast extends thread { String S = "today's weather is fine, good scenery everywhere! "; Int Port = 5858; // The multicast port. Inetaddress group = NULL; // multicast group Multicastsocket socket = NULL; // multicast socket Broadcast (){

1. Introduction Unicast transfers data to a specific host. If an IP packet is sent to a host, the link layer header is a very specific destination address. For Ethernet, It is the MAC address of the NIC. Broadcast and multicast are only used in UDP. They are very important for applications that need to transmit packets to multiple receivers at the same time. Broadcast is to send packets to all hosts on a network. The network may be a network, a

Broadcast and multicast are only applicable to UDP. Generally, each Ethernet frame is sent only to a single destination host. The destination address specifies a single receiving interface, which is called unicast ). A host sends frames to other hosts on the Internet. This is broadcast. Multicast (multicast) is between unicast and broadcast: Ethernet frames are s

. Publish-subscribe model (pub/Sub) [multicast-based communication mode]The publishing-subscription model uses a content hierarchy called a topic to replace the unique destination in the PTP model and send applications to publish their own messages, it indicates that the message describes a topic in the layered structure. Applications that want to receive these messages subscribe to this topic. Subscribe to a topic in the subtopic hierarchy. subscribe

Multicast programming -- Role Summary of setsockopt () Option Parameters So_rcvtimeo so_sndtimeoSets the network transmission and receipt latency. In the send (), Recv () process, sometimes due to network conditions and other reasons, the sending and receiving cannot be performed as expected, but the sending and receiving time limit is set; doubt: if it times out, it cannot be received or cannot be sent, what will happen? So_rcvbuf so_sndbufBy defaul

Definition : Delegate It is a type of method reference stored in an object, and also a type of safe function pointer. One way to understand delegation can regard the role of delegation as specifying a name for the method signature. The delegate definition is similar to the method definition, but there is no method body. The keyword delegate must be added before the defined delegate name. Because the definition delegate basically defines a new class, you can define the delegate anywhere in

, which are called multicast delegates. IfYou can call multiple methods in sequence by calling multicast delegates. Therefore, the delegate signature must return void (otherwise, where should the return value be sent ?) (When a delegate only contains one method, its return type declaration can refer to the encapsulated method, not necessarily void ). In fact, if the compiler finds that a delegate returns vo

Set up Multicast Server Step 1: RunProgramThen select "media-streaming "; Step 2: click Add to select the file to be played (take the WMV file as an example) and click stream "; Step 3: set three parameters for stream output: source, target, and option. The source has been specified just now. Click "Next "; Step 4: Select "display locally", select "RTP/MPEG transport stream", and click "add "; Step 5: if an IPv6

The test code for multicasting is as follows:#include The following error occurred during the Ubuntu compilation run:The answers to the relevant information are as follows:It means that the tool was trying to use multicast and the network interface doesn ' t support it there be, likely causes :· Your machine doesn ' t has multicast support enabled. For example, on Linux and FreeBSD it's possible to compile