What is distributed computing and how to use it? Distributed computing is a model program focused on the design of distributed systems whose properties: fault tolerance, cross-use, extensible , open. This template is the natural result of using a computer to set up the computer network. Distributed computing is parallel computing is decentralized, using two or more computers communicate with each other via a network to complete find a common task or goal. The type of hardware, programming languages, operating systems and other resources are used can vary. It is similar to the clustered computer (computer clustering) with the main difference is that the dispersion of the geographic resources. The organization of interaction between computers in the system have great importance. To be able to use various types of computers as possible, protocols or channels should not contain or use any information that only a certain number of computers can understand. Also need special attention to the messages to be delivered in the right way and the message is not valid must be removed, otherwise they can harm the system and possibly the rest of both networks. An important factor is the ability to send the software to another computer in a portable (portable) so that software can perform and interact with the existing network. This is not always feasible and practical sense when using the resources and different hardware, in which case the need to use other methods such as transcoding compiler (cross-compiling) or moved by hand (manually porting) software. Information technology and telecommunications grows, requiring the need for information processing increasing, many times faster than the pace of development of hardware resources and software. There are many issues raised by the centralized systems usually do not meet, so processing speed is limited. Building a distributed system capable of simultaneously handling a problem on many PCs as a viable solutions and proven usability. Distributed system also creates many advantages in sharing information around the world There are many forms of different distributed systems and are more difficult to design. The main purpose of the system is connected dispersed users and resources in a transparent, open, and can be extended. Ideally, the system has better fault tolerance and more powerful computer system combining independent. Today, Web services become the standard protocol of the distributed system. A wallet example of distributed system is the World Wide Web. When you view a web page on a site, actually you are using a distributed system containing sites. When you browse the web, your browser is running on your computer to communicate with various web servers and give you the web page you requested. We can use your browser through a proxy server for access to content on web pages containing web server quickly and safely. In order to identify these servers, browsers should use systems distributed DNS domain name. The browser is accessible to all the servers on the Internet through the router system that they themselves make up a huge distributed system.
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