scada protocols

Network communication protocols, as the name suggests, are the protocols used for communication in computer networks and the standards for various network data transmission and other work, only one effective standard model can ensure that all kinds of services and services on the Internet can be completed in an orderly manner. Next we will introduce several network communication

Internet protocols are the foundation of our network usage and development. So the understanding of this protocol is particularly important. Now we will parse some of the content of this Protocol, including its addressing, segmentation, and gateway knowledge. The addressing method is also the address method we currently use in the IPv4 protocol. With the continuous development of the network, we will replace the current IPv4 with the IPv6 protocol, an

Computer network is more and more important in today's life, so we learn the network knowledge is very necessary. Network communication is divided into 5 layers, namely: physical layer, Data link layer, network layer, Transport layer, application layer.In the data link layer is responsible for the transmission of data, there are many kinds of protocols, the most used is the Ethernet protocol in the LAN, and the PPP protocol in the WAN, HDLC protocol.E

be far greater than the number of humans. In this context, the Internet of things and technology have emerged. Although it is easy for people to connect to the Internet, access to the Internet is difficult for those tiny devices. In the current world of PC, information exchange is implemented via TCP and Application layer protocol HTTP. But for small devices, implementing the TCP and HTTP protocols is clearly an excessive requirement. The COAP protoc

6.4 Configuring network ProtocolsThe database engine must have network protocols enabled before the client connects to the database engine. The SQL Server database engine can simultaneously enable multiple network protocols for the request service, and the client uses a single protocol to connect to the database engine.You can enable or disable a network protocol directly in the right-click menu. You can al

RIP (Routing Information Protocols) Routing Information Protocol OSPF (Open Shortest Path First) Open Path First (Enhanced Interior Gateway Routing Protocol) Enhanced Internal Gateway Routing Protocol Static Routing: static Routing is only applicable to small networks or small to medium-sized networks with only a small scale. Manual Input and manual management are required. Management overhead is a huge burden for dynamic routing. Advantages: Excellen

-time multimedia transmission. RTP is an application-oriented transport layer protocol that does not provide any guarantee of Transmission reliability and traffic congestion control mechanisms. RTP is located on top of UDP (User datainprotocol. Although UDP is not as reliable as TCP and cannot guarantee the service quality of real-time services, RTCP needs to monitor data transmission and service quality in real time. However, because UDP transmission latency is lower than TCP, it can work well

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 corresponding interfaces for upper-layer calls. It is easy to communicate text information, but it is

This is a description of some existing common protocols in the open-source community: Http://www.cnblogs.com/ourgame/articles/9237.aspx The premise of this article is that sumtec's views on open source protocols ..Because our game project is intended to be developed by many people, and we will have the opportunity to commercialize it in the future, we will try our best to commercialize it... all the discus

The legendary WCF (1): Is this hard to learn?The legendary WCF (2): What about service agreements?Legendary WCF (3): multiple protocolsLegendary WCF (4): send and receive SOAP HeadersLegendary WCF (5): data protocols ()Legendary WCF (6): data protocols (B)Legendary WCF (7): "one-way" "two-way"Legendary WCF (8): Play with message protocolsLegendary WCF (9): stream and file transferLegendary WCF (10): messag

Benefits-> KVC + Runtime: Get the attributes, member variables, methods, and protocols of classes/objects and implement dictionary-to-model conversion. kvcruntime We know that KVC + Runtime can do a lot of things. With this, we can achieve a lot of results. Here we provide a benefit. We use KVC + Runtime to obtain all member variables, attributes, methods, and protocols of classes/objects; And use it to imp

returns a flag indicating that more data can be obtained, and the read operation after the application will return the rest of the datagram. When discussing TCP, we found that it provides continuous byte streams for the application without any information boundaries. TCP transmits data according to the length required by the read operation of the application. Therefore, no data loss occurs in this interface. Certificate --------------------------------------------------------------------------

Two types of transport protocols: TCP,UDPTCPTCP is the short name of Transfer Control Protocol , which is a connection-oriented protocol that guarantees reliable transmission .In the TCP/IP protocol,IP layer is mainly responsible for the location of the network host, the routing of data transmission, by the IP address can uniquely determine a host on the Internet　　 . 　　The TCP layer provides an application-oriented reliable or unreliable data transmis

The purpose of this blog is to make a systematic carding and summary of the streaming media and some protocols that have just come into contact with this period of time. So that it can be done on the basis of understanding in the process of subsequent use. Of course, many of the content is from all of you to share, at the end of the blog will be attached, you can also go to the corresponding places to get a deeper understanding of the relevant content