WEB and P2P: the nagging double helix
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WEB and P2P as Internet two kinds of most basic mode, and has long been considered a twister, but again they intermixing endlessly, as if the DNA double helix.
The network can be traced back to the earliest conception of distant 1980 Tim Bernard, ENQUIRE project of constructing lee. This similar wikipedia online editing databases, although hypertext we now use the web is very different, but they are contains many of the same core ideas. In 1990 he wrote the first web to realize this idea he. In that year's Christmas vacation, he made a WEB based: the first mode of world wide WEB browser and the first WEB server. In 1991 he in Alt. Hypertext newsgroups released the world wide web project profile on the article, this day on the Internet also marks the debut of the world wide web public service. In 1993, the European organization for nuclear research announced the world wide web, not open anyone for free of charge. After two months because of his biggest competitor Gopher silly charges strategy, the world wide WEB finally unify the whole country, WEB era.
Centralized WEB
In traditional WEB mode, the information resource sharing is the server is center client/server model work patterns. One WEB server is running a WEB server program, computing power and storage capability of computer, all WEB pages are stored in WEB server. The server can for many WEB browser services provided to clients. But, can direct communication between a WEB browser. Obviously, in the traditional Internet information resources sharing relationships, service providers and the boundaries between service users is clear, the Internet resources is also highly centralized.
The network resources distribution network application system is not merely the design idea of designer reflect. The network sets up purpose is to realize resource sharing, "resource sharing" show network nodes in hardware configuration, operation ability, storage capacity, and data distribution difference and distribution of not balanced. Ability and rich in resources computer server, ability weak or as needed some resources computers as customers. Customers using server services provided to clients, server network services. Therefore, C/S reflect this network service providers and network service users relationship. In C/S mode, customer and server on the network service of the unequal status, server on the network service in a central position.
From the application layer application working model perspective, application is divided into client program and server program. In the beginning, because network computer system type, hardware structure, function and there are big differences. Large computer, high-end server and personal computer even PDA operation ability, storage capacity, and external equipment equipped differences, in order to remedy the hardware resources of unequilibrium, C/S mode is very necessary and important.
From a software point of view, many large application software is installed on a dedicated server, users need through the Internet to access servers, become legitimate users can only use the Internet after software resources, this kind of special software stored in special server, so that users want to obtain some software services, also need a server. With the upgrading of the software and hardware technology, the advent of the Internet concept, the focus to user information transfer, gradually, eager to participate in information sharing user are simply recipients. A certain types of data, text, images, video or music resources stored in one or several sets of large server, legitimate users can access this information resources through the Internet, though it to ensure that information resource use the legitimacy and safety, and ensure the integrity of the data and consistency is very necessary, but this information in the imbalance to MSN's heyday increasingly unable to satisfy users today with demand.
In computer hardware configurations increase, network application level increases, the network information resources accumulation and storage pattern changes, and on the basis of network resources sharing model will inevitably lead to the changes in such technology development under the background of the development of P2P networks appear also appears very natural.
But in some perspective, the WEB may not be fully focused, a world of everything exists both fully focused or completely distribution of structured not exist, WEB and not put all the information together, information can be placed in different sites in the browser, only need to specify this site can visit the site of content. Thus achieve these in physics is not necessarily the information in a site in logic, users to see these information integration is focused.
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By :
Jessie Stone
Submitted
2011-04-15 01:46:04 |
Article From Article Mayhem
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