scada protocols

Http://highlyscalable.wordpress.com/2012/09/18/distributed-algorithms-in-nosql-databases/, distributed algorithms in nosql Databases Http://www.cnblogs.com/chen77716/archive/2011/03/24/2130798.html, gossip Algorithm Gossip, "Efficient reconciliation and Flow Control for anti-entropy protocols" Anti-entropy protocols, gossips Anti-entropy, OrGossip, Is an attractive way of replicating state that does not hav

It is very important to use the vro protocol when using vrouters. So I studied how to use multiple vro protocols. Here I will share with you, hoping to help you. There are many ways to implement multiple router protocols in a network. Sometimes, these router protocols do not even know the existence of other protocols a

On the Internet, we can play games or watch movie animations online. It is even more difficult to process some documents. So how does it do it? These also need to rely on the role of the tcp ip protocol. However, the tcp ip protocol is not only a collection of many protocols. We have learned about the OSI reference model before. Now let's take a look at how the tcp ip protocol implements the network model compared with the layer-7 Protocol Reference M

PPTP, L2TP, IPSec, SSLVPN, and other Protocols define and distinguish between VPN (Virtual Private Network). So far, it is no longer a pure encrypted access tunnel, it integrates multiple functions such as access control, transmission management, encryption, route selection, and availability management, and plays an important role in the global information security system. Also on the network, the advantages and disadvantages of various VPN

Before we talk about routing protocols, let's look at the structure of the routers:A router is a dedicated computer with multiple input ports and multiple output ports whose task is to forward groupings.The core of the routing part is the routing processor, which can construct a way out of the table according to the selected routing protocol, and Exchange routing information with regular or regular and neighboring routers to update and maintain its ow

For the Internet, various protocols are used to regulate its usage, so that this large and complex network can work in an orderly manner. In this protocol structure, the tcp ip protocol family is the foundation. What protocols are included in this structure? In order to allow readers to fully understand some basic network communication protocols and services, thi

PIM-DM intensive mode)The PIM intensive mode is the preferred configuration in the multicast routing protocol. This Protocol is strongly supported by Cisco and provides easy configuration and troubleshooting methods. Similar to DVMRP, the PIM intensive mode does not have the characteristics of flooding or deleting. Therefore, it can still be used as an option for configuring short-term protocols for wide-area multi-point transfer. Meanwhile, the PIM S

progress, but we must not ignore the role of IPv4 in the past and future networks. As a large number of currently used devices support IPv4, communication operators must fully consider how to evolve to IPv6. IPv6 will be implemented at the network application layer and transport layer. devices that adopt IPv6 in advance also need IPv4 support on the backbone network. In this way, the interconnection and compatibility between IPv6 and IPv4 protocols n

Extensions and protocols are two features in Swift that are used to extend and modify existing types.Extension (extension)Add new Features (properties, methods, subscript scripts, and so on) to existing types, extensions using the extension keyword definition, syntaxExtension classname{ //define properties, methods, etc. ... }Protocol (Protocol)Used to declare the methods and properties necessary to complete the functionality of a task, o

We are very familiar with UDP. Here we will introduce the UDT protocol. The two protocols are easy to confuse in terms of abbreviations. You must first distinguish them clearly. Next, let's compare and differentiate this part of content. 1. Introduction With the increase of network bandwidth latency products (BDP), the TCP protocol is usually becoming inefficient. This is because its AIMDadditive increase multiplicative decrease) algorithm completely

Step one: In the Network icon, click PropertiesStep two: Click "Local Area Connection"Step three: Click "Properties"Step four: Click "Install"Step five: Click "Protocols" and addStep Six: Click "Reliable Multicast Protocol" and then determineStep Seven: Return to the Ethernet Properties dialog box to see the installed protocol in the "This connection uses the following items" list box, that is, the extra-reliable multicast protocol. Click "Close"Step

-scale network environments. The RIP protocol is used to transmit route information in an AS autonomous system. Route information is updated every 30 seconds. The RIP Protocol provides hop count to measure the route distance, the hop count is the number of routers required for a packet to reach the target. The maximum number of hops supported by RIP is 15. Application: in Windows, we can enable the "RIP listener" function to listen to RIP messages, so that the computer can understand other route

through the local registry or group policy object (GPO. To do this, run Setup.exe from the SupportTools folder on Windows 2000 CD to install Netdiag.exe.2. Open the Command Prompt window and set the working folder to C: Program FilesSupport Tools.3. Run the following command to verify that an existing IPSec Policy is specified for the computer:Netdiag/test: ipsecIf no policy is specified, you will receive the following message:IP Security test ......: Passed IPSec policy service is active, but

heterogeneous networks) ARP (Address Resolution Protocol): Address Resolution Protocol RARP (Reverse Address Resolution Protocol): Reverse Address Resolution Protocol ICMP (Internet Control Message Protocol): Internet Control Message Protocol IGMP (Internet Group Manage Protocol ): Internet Group Management Protocol BOOTP (Bootstrap): optional security start Protocol Data Link: bridge switch (switcher) HDLC (High Data Link Control ): advanced Data Link Control (storing data between LANs-forward