scada communication protocols

Every time you write and design a network communication program, you always have to deal with the problem of customizing a set of application protocols (that is, communication protocols) and then writing corresponding methods to parse the protocols, and provides correspondin

Through understanding the computer network, its layer-7 structure has different protocols to regulate. Based on the network type, we can divide these protocols into LAN protocols and generalized network protocols. Now let's talk about what protocols are included in the broad

httpd, we run the make command after the end, go into the 07_httpd folder to view, found that there is no generation httpd this file, detailed see three:Figure three Questions oneWorkaround: Run the make command again to get the prompt "can ' t open output file. /bin/httpd ", you know, in our current 07_HTTPD folder in the parent directory WS does not exist in the Bin folder, so the command is not allowed to enter the WS/BIN/HTTPD path, thus, We chose to use mkdir, the command that created the

to the number of clients × client traffic. The server is overwhelmed in streaming media applications with a large number of customers and high traffic per client. 2. The existing network bandwidth is a pyramid structure. The inter-city backbone bandwidth is only equivalent to 5% of the total bandwidth of all its users. If all the unicast protocols are used, the network trunk will be overwhelmed. Now, P2P applications have frequently congested the tru

The study of the Dubbo protocol, you can know the current mainstream RPC communication is probably what the situation, this article refer to Dubbo official documentation Http://dubbo.io/User+Guide-zh.htm Dubbo supports a total of the following communication protocols: dubbo://rmi://hessian:///http/webservice://thrift://memcached://redis:// Some of the features a

In practical applications routers are often connected to many different networks, to achieve communication between multiple networks, routing protocols are configured on routers, and in some large network topologies, there are situations where multiple routing protocols are common, and new technologies are used to---route redistribution. As a result of the compa

(1) SDP description format(2) SDP example(3) SDP(1) SDP description formatM=video 1234 RTP/AVP 96a=rtpmap:96 H264A=framerate:15C=in IP4 192.168.0.104Above is a self-written RTPM=audio 1234 RTP/AVP 0a=rtpmap:0 PCMA/8000/1A=framerate:25C=in IP4 172.18.168.451.m= is the beginning of a media-level session, Audio: media type; 1234: port number; RTP/AVP: transport protocol; Payload format in 0:RTP header2.a=rtpmap: proof is a further description of dynamic binding; payload format in 0:RTP header; PCMA

/**author:davidlin*date: 2014-12-20pm*email:[emailprotected] or[emailprotected]*world:the cityofSZ,inChina*Ver :000.000.001*for:threads forrxtx!*history:editor timedo NBSP;NBSP;NBSP;NBSP;*NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;1) LinPeng 2014-12-20createdthisfile! *NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;2) */ #include Protocol implementation: How to implement one of the simplest communication

In the communication field, we are still using the inherent GPRS communication method. The network protocol for it includes the UDP protocol and the TCP protocol. Now let's talk about the selection and requirements of the following two protocols based on the GPRS network bearer capability. Now let's take a look at the following article. ◆ Network carrying capacit

comparison of RPC and HTTP communication protocols Before we start discussing this topic, let's get to know the traditional development model. Seven-layer model of OSI network structure The specific descriptions of the layers are as follows: Layer Seventh: The application layer defines the interface-user program for communication and data transmission in the ne

the same way as the HTTP protocol, and it is transmitted in either TCP or UDP. A metaphor is a good idea. Both TCP and UDP are highways, and for the moment TCP is considered a general highway, UDP Highway, SOAP and HTTP are all cars, then both soap and HTTP can run on TCP and UDP. Said soap can be transmitted via HTTP, which is actually said that soap is a car, HTTP is a car truck, the SOAP information into the HTTP, and then transport, of course, the road is still TCP or UDP. Said soap can be

*author : Davidlin *date : 2014-12-20pm *email : [email protected] or [email protected] * World : The city of SZ, in China *ver : 000.000.001 *for : Threads for rxtx! *history: editor time do * 1) Linpeng 2014-12-20 created this file! * 2) */ #include Protocol: How to implement one of the simplest communication protocols