scada protocols

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Redistribution and route selection protocols

We all know that the destination address can be effectively selected for data distribution when the routing selection protocol is used. So how can we allocate resources when multiple protocols coexist? Now let's talk about this issue. I. Redistribution 1. Redistribution means that when an organization runs multiple routing protocols, it must notify the network learned by one routing protocol to the other by

Serialization of communication protocols

Translated from: http://blog.chinaunix.net/uid-27105712-id-3266286.htmlCommunication protocol can understand two nodes in order to work together to achieve information exchange, negotiate certain rules and conventions, such as the provision of byte order, each field type, using what compression algorithm or encryption algorithm. Common protocols such as TCP,UDO,HTTP,SIP are commonly found. The protocol has process specifications and coding specificati

Redis Research (13)-Security and communication protocols

that the Redis client communicates with Redis, and the communication protocol specifies the format of the command and return values. Understanding the Redis communication protocol not only allows you to understand the format of the AoF file and the contents of the master database to be sent from the database during master-slave replication, but also to develop your own Redis client (although there are corresponding Redis clients in almost all common languages). There is really not a lot of oppo

Details and differences between SSL and TLS security authentication protocols

handshake protocol. SSL is developed by Netscape to protect Web communication. The current version is 3.0. The latest version of TLS 1.0 is a new protocol developed by IETF (engineering task group). It is based on the SSL 3.0 protocol specification and is a later version of SSL 3.0. The difference between the two is very small. it can be understood as SSL 3.1, which is written into RFC.SSL (Secure Socket Layer) is developed by Netscape to ensure the security of data transmission over the Intern

Comprehensive Analysis of router introduction, working methods and protocols

to send IP groups that do not know where to send them. In this way, the router correctly forwards IP groups that know how to transfer them, and the IP groups that do not know are sent to the "Default Gateway" router. In this way, the IP Group will eventually be sent to the destination, IP groups that cannot be sent to the destination are discarded by the network. Currently, all TCP/IP networks are interconnected through routers. The Internet is an international network that connects thousands o

Communication Protocols-HTTP, TCP, and UDP

Cp http udp: All are communication protocols, that is, the rules observed during communication. Only when both parties "speak" according to this rule can the other party understand or serve it. Relationship Between tcp http and UDP: TCP/IP is a protocol group, which can be divided into four layers: network interface layer, network layer, transmission layer and application layer.The IP protocol, ICMP protocol, ARP protocol, RARP protocol, and BOO

Open-source protocols (Conversion and Collection)

Source: http://mixiaobo.cnblogs.com Indirect Source: http://www.juntuan.net Open source is already widely used in today's software industry, but does it mean that users canCodeWhat do you want? The answer is no. Open-source sports also have their own game rules and ethics. Failing to comply with these rules will not only damage the healthy development of the open source movement, but also cause reputational and market losses to violators, and more likely fall into legal disputes and compensa

[Protocol] comparison of five open source protocols (BSD, Apache, GPL, lgpl, MIT)

From http://www.awflasher.com/blog/archives/939 When Adobe, Microsoft, sun and other giants began to show their favor for "Open Source", the era of "open source" is approaching! Originally from: sinoprise.com/read.php? Tid-662-page-e-fpage-1.html (unfortunately this link has not been opened), I basically did not change, just some typographical and finishing.References: http://www.fsf.org/licensing/licenses/ There are many open-source protocols

Comparison of four open source protocols: BSD, Apache, GPL, and lgpl

References: http://www.fsf.org/licensing/licenses/ There are many open-source protocols, and there are currently 58 open-source protocols approved by the Open Source Initiative Organization. Common open-source protocols such as BSD, GPL, lgpl, and MIT are all OSI-approved protocols. If you want to open your ownCode, I

Several open source protocols

Every time I go to an open-source website and see the GPL and Apache authorizations, I don't understand what they mean. I found an article on the Internet to expand my knowledge. Bytes ------------------------------------------------------------------------------------------- Repost the following article When Adobe, Microsoft, Sun and other giants began to show their favor for "Open Source", the era of "open source" is approaching! Originally from: sinoprise.com/read.php? Tid-662-page-e-fpage-1.

Understand network protocols

We have been dealing with computers all day, learning from the outside world through the Internet, and getting rich learning materials from the Internet. We can also exchange information with others through computers, in fact, all these actions are information interactions between multiple computers. Do we know how the information is transmitted? How can we make the data on one computer accurate to the other? Next, let's learn about the network protocol. Technology world: Generally speaking, ne

Comparison of five open source protocols (BSD, Apache, GPL, lgpl, MIT)

There are many open-source protocols today, and there are currently 58 open-source protocols approved by the Open Source Initiative Organization (http://www.opensource.org/licenses/alphabetical ). Common open-source protocols such as BSD, GPL, lgpl, and MIT are OSI-approved protocols. If you want to open your ownCode,

Objective-C Protocols, objective-c

Objective-C Protocols, objective-c Objective-C allows you to define protocols, which declare the methods expected to be used for a particle situation. Protocols are implemented in the classes conforming to the protocol. A simple example wocould be a network URL handling class, it will have a protocol with methods like processCompleted delegate method that intimat

Introduction to Internet protocols

I. Overview 1.1 Five-layer model The realization of the Internet, divided into several layers. Each layer has its own function, like a building, each layer is supported by the next layer. What the user touches is just the top layer, and there is no sense of the layer below. To understand the Internet, you must start from the bottom and understand the function of each layer. There are different models for layering, and some models are divided into seven layers and some four layers. I think it

Introduction to open-source protocols: BSD, Apache licence, GPL, lgpl, and MIT-reprint

When Adobe, Microsoft, sun and other giants began to show their favor for "Open Source", the era of "open source" is approaching! From: http://www.sinoprise.com/read.php? Tid-662-page-e-fpage-1.html (regret is that this link has not opened), I basically did not change, just some typographical and finishing.References: http://www.fsf.org/licensing/licenses/ There are many open source protocols today, and there are currently 58 open source

Three Common network protocols: NetBEUI, IPX/SPX, and TCP/IP

Q: What are the NetBEUI and IPX/SPX TCP/IP protocols ?? In particular, the first two are sometimes installed, and sometimes they are not installed. Why ?? What are their differences and uniqueness? When must I install it? A: A lot of netizens asked this question. I have consulted and integrated the relevant information here to give you a detailed explanation. The network Protocol is a special software and the most basic mechanism for a computer networ

Common network protocols

Which Address Resolution Protocol (ARP) Address Resolution protocols are commonly used to map the physical Address of a computer and the network Address temporarily specified. At startup, it selects a protocol (Network Layer) Address and checks whether the address has been used by another computer. If it is not used, this node is used, if this address has been used by another computer, the computer that is using this address will advertise this inform

Next-generation protocols related to IPv6

Next-generation protocols related to IPv6 are in the TCP/IP protocol set. Protocols that are directly active and indirectly interoperable with IP addresses include various application layer protocols, connection protocols, and TCP and UDP. This chapter will discuss the impact of IPv6 on other layer

Simple text and binary protocols

Simple text protocol and binary protocol write network programs cannot hide the Protocol. The Protocol actually defines the Message format and how messages are exchanged. The protocol can be simple, complex, and sophisticated, such as the TCP protocol, and simple and unrestrained, such as the HTTP protocol. Here, I will summarize the protocols I have come into use, and finally throw out simple and common text prot

A Preliminary Study on WCF-16: Basic knowledge of WCF data protocols, wcf-16

A Preliminary Study on WCF-16: Basic knowledge of WCF data protocols, wcf-16Data protocols "Data agreement" is a formal agreement between the service and the client, used to describe the data to be exchanged in an abstract way. That is to say, for communication, the client and service do not have to share the same type, but only need to share the same data protocol. Data

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