计算机专业外文文献翻译外文翻译网络通讯软件的发展趋势简析.doc

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1、Development trend brief analysis of the network communication software Along with the development of the information science technology rapidly, the humanity will face the new technologies, new concepts one after another incessantly at any time. The development of the computer technology, the electr

2、onics industry, the network communication and the transmission technology apace, made the timely communication great progress at some fields, and the C/S structure as the representative. The Client - Server (C/S) technology evolves from the host computer technology which the single processor system

3、generates naturally, which may trace to the computer origin. In the host computer technology, data in system processing and the management is all completed in the central. The host computer is revolving by the some periphery customer terminals which merely simply support information performance. In

4、the period of the Client - Server technology, the client computer becomes the important processing resources. The client system processing speed rises unceasingly during the personal computer revolution. Now its processing speed might compare beauty with the small machine and the large-scale machine

5、ry before, even had surpassed them. At first in order to support the department and enterprises data accessing, the Client - Server technical has supported to connect through the local area network (LAN) to the rear end large-scale machinery, the small machine and the workstation server system. The

6、technology which Supports this kind of communication in the software level is called as the middleware. At first, the middleware is installed to support the Client - Server network communication conventional ability between the PC and the server platform. Along with the technical development, the mi

7、ddleware is embedded in the operating system gradually, so it became one kind of ordinary ability in the client platform and the server platform. The client system which the middleware has been embedded in supports to the application procedure service which are operated through the local and the net

8、work now. The evolvement from the Client - Server technology to the embedded ability increases a few challenges for the application system execution. Recently the Client-Server technology is being replaced gradually by the N-tier Object Oriented solution. The N-tier solution Based on the Java applic

9、ation procedure server has contained to support the thin client terminal user interface, strengthened the expandability and the reliability at the same time. Now the interconnection network is mostly based on IPv4 protocol. The success of the protocol has facilitated the Internet rapid development.

10、But, along with the Internet user quantity is increasing unceasingly and the application request of the Internet is enhancing, the want of the IPv4 is appearing gradually. Most incisive question is the growing huge demand of the Internet resources and the omen of the insufficient IPv4 address space.

11、 At present the IPv4 address has already assigned about 70%. Among it B kind of address already is exhausted. According to the IETF forecast, the IPV4 address resources will be exhausted in 2005 2010 year. Moreover, because the IPv4 address plan cannot support the address gathering commendably, the

12、existing Internet is facing the pressure which the route table inflates unceasingly. At the same time, the demands of the service quality, mobility and security and so on are all urgent to develop the new generation of IP protocols. In order to settle Internet address crisis drastically, IETF has 12

13、8 bit addresses the IPv6 Internet protocol in the middle of 1990s early, and has carried on the further standardized work in 1998. Besides address space expansion, IETF made the definition to the IPv6 address structure. IETF assign the address which adopts the CIDR method in the IPv4 similarly. IPv6

14、 has also provided the new characteristic to support the automatic disposition, the mobility and the security and so on better. At present, the main protocols of the IPv6 has matured already and has formed the RFC text, it already obtained the world consistent approval as the only substitute of the

15、IPv4. The big communication facility merchants overseas all invested the massive resources in the IPv6 application and research, and developed the relevant software and hardware. Called the network file server, one of the most successful network technologies, comes from the Sun Microsystems Co. The

16、Sun Microsystems Co. has become the actual standard successfully through providing the realized source code free reference technology visit authority on any platform. The network file server technology, another Sun Microsystemss technology, one of first generation of successful distributed computer

17、technologies, is based on the open style network computation. The network file server is the technology based on the oriented-process, is held in the C programming language, like other important long-distance procedure call technologies (distributed computing environment). The two kinds of technolog

18、ies all realize the document sharing ability widely. The database server technology provides that the different client platform access the long-distance database system by these lower levels distributed computing ability.Has the matter you Q I!, not long since this speech is widely popular both side

19、s of the river during one night, becomes standard message while people leave. The only word witnesses the co-prosperity and co-indignity history of the timely communication and the Chinese Internet. That cant deny that, the timely communication facilities which take the fast, interactive, easily as

20、the representative, already became the network communication tool which the current network users mostly like. The other Internet increment services Based on the timely communications platform, like the phonetic, music order, information sharing and so on are also changing peoples life style by the

21、unprecedented speed. Along with Internet application is more and more rich in the years, The Internet third war year erupted drastically. After Tencent QQ have occupied the timely communication market 76.7%, Microsoft MSN, Net Easy POPO, Yahoo! Messenger, Skype and so on enter the market in abundanc

22、e, strive to be the first strenuously.Firstly, the immediate communication application will be even more multiform.In later several years, people might the clearly feel that the chatted entertainment demand which the user demand timely communication is growing unceasingly, along with the timely comm

23、unication facilities itself more and more richly. The application of the more prolific entertainment will already becomes the main development direction of the timely communication in future. In order to meet the user exuberant entertainment application need day by day, many timely communications se

24、rvices providers all develop the prolific application based on the timely communication platform, for example: The virtual image, the magic expression and the virtual pets and so on ,which the new application emerges one after another incessantly.Second, the timely communication even will be more an

25、d more absorbs the peoples attention, will manifest the community and Interaction The analysis demonstrated, the reason that the timely communication is developing in recent years swiftly and violently, is the important impetus factor not only the its itself function but also the Internet rapidly ga

26、thering user. According to the CNNIC statistics report: the user accessed the internet is total to 87 million users in our country until June 30, 2004, the computers accessed the internet have achieved 36.3 million computers, the network application of the timely communication services like the emai

27、l、 the search engine、the browsing information and so on are going into to in web users daily life in maximum. Following the Internet development and the network user demand, the comm- unity and the interaction which are absorbing a mass of users will also become the important development tendency of

28、 the timely communication. According to the concerned expert forecast that the network hypothesized life will become the hot spot of the Internet application in the future two or three years. The network user may have network life like the real life e.g. purchases homes, buys the vehicle, and raises

29、 the pet and so on. At the same time, the pure chatting tool is entrusting with the new connotation, becomes a rich individual space. There are not only the friends who may chat with you, but also games, news, community, diary and so on. The Internet enterprise sets up the alumnus in the network, fo

30、unds community, provides the platform which composes the diary for the network user, lets the users establish their own blog. It is satisfied the network users demand to the network hypothesized life. The third tendency will be the even more outstanding function processing individual information of

31、the immediate communication. Humanization will become the final factor of the immediate communication as the most quick and convenient communication tool. At present it already was applied widely to in the daily work and the study. The user had affiliated with and saved the massive materials documen

32、t on the Internet every day. Therefore, as the transmission information terminal, the individual information processing function of the immediate communication will decide the itself vitality radically, which not only includes the information interactive function of the writing dialogue、the voice co

33、mmunication、 the video intercommunion, but also includes the information sharing function of the file transfer and the transmission picture, meanwhile includes the effective preservation of the chatted recording, the down-transmission and download information management function. The fourth tendency

34、 is that the immediate communication even more emphasizes the Internet application conformity, the wireless Internet resources conformity in particular. Now the application of the immediate communication and the exchange of the Internet information already merged into one organic body, so the each k

35、ind of service of the conformity Internet will become the inevitable trend which the immediate communication future will develop, which satisfies the immediate communication users share the Internet resources. At present, Sina UC、the net easy hubble-bubble have the gateway website the formidable net

36、work resources, but Microsoft also is strengthening the gateway with the aid of MSN the influence. The immediate communication application will present with the traditional gateway website, motion or the fixed terminal, the network application increment service depth conformity tendency; in the wire

37、less Internet resources conformity, the people hope to gets rid the line fetter and get the “wireless” freedom more and more, along with handset application is studied and developed unceasingly in the nearly two year in our country. The wireless accesses will become the network users pet. That the h

38、andset lands or accepts from the internet information is also to receive the users favor, especially the immediate information or news. In future the conformity between the Internet and the wireless net will be the inevitable home, the mutual connection between the immediate communication and the wi

39、reless will also be a way that must be taken. Along with 3G devotion, the immediate communication users motion demand is higher; the immediate communication motion increment service will be able to develop ones ability to the full. The fifth tendency will be that the immediate communication even mor

40、e manifests the security and the stability According as investigation demonstration, the user not only needs to realize the voice, audio frequency, video function and so on through the immediate communication ,but also the immediate communication security along with each kind of data service applica

41、tion increasing. ID robbed, privacy exposition, viral invasion and so on is puzzling all along. In particular to the enterprise users, if the security measure is unreliable, the enterprise will pay the huge price for the bug. Without a doubt, the safety has already become the basis of immediate comm

42、unication safeguard foundation application in the future. Because the entire industry did not yet formulates the immediate communication security standard, the fad immediate communication soft wares at present are all the files access、 the files transmission、the password input encryption simpleness,

43、 therefore which did not fully safeguard to users use safety and privacy. QQ has adopted the design model of the advanced open secure system structure and 128 bit high strength encryption algorithm; it guarantee the security of the entire system through a series of complex shake-hand authentication

44、mechanism. In future it will guarantee the QQ safeguard measures that the user is using of based on the existing foundation: One measure is that the local information memory and the network intelligence transmission encryption algorithm; Two measure is that more strengthens the users password securi

45、ty; Three measure is that more prevented the malicious link and the malicious virus spread through QQ. Thus it is obvious that, although the technical support bases the safe foundation, the self-consciousness and the initiative of the protection user safety are especially important. In this aspect,

46、the user is satisfied with the QQ pledge and performance. The tencent QQ Engineer explained the endeavor in the QQ security aspect in detail. From the birthday of the communication birth, the product stability is the concern user and enterprise in the extreme. In the present in the circumstances of

47、the immediate communication application rapid development especially, the stability is the basis that the immediate communication guarantee user application, enhances product mucosity. Along with the unceasing breakthrough technical method, at present, the immediate communication product stability m

48、atures day by day, each kind of products of the immediate communication all can process any form document, the immediate transmission picture, the documents, the song and so on ,even can realize continues to transmit the information still after the network is off at little moment, for instance the b

49、reak-point transmission function of the Tencent QQ is able to insure the stability of the transmission document effectively, and is unimpeded under any network environment ,has also become the first choice transmission document way of the immediate transmission users. The sixth tendency is that the amalgamation of the immediate communication between the social culture and the localization applies After the immediate communication has already become one custom that the users interco