1、中文 4150 字 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,
2、the electronics 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 process
3、or system 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 perfor
4、mance. In 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-sca
5、le machinery 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 sy
6、stem. The 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 developme
7、nt, the middleware 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 a
8、nd the network 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 J
9、ava application 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 dev
10、elopment. 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 addr
11、ess space. 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 commend
12、ably, the 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, I
13、ETF has 128 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 simil
14、arly. IPv6 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 substitu
15、te of the 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 Microsystem
16、s Co. The 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
17、 computer 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
18、 technologies 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 popula
19、r both sides 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,
20、 easily as 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 st
21、yle by the 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
22、in abundance, 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 th
23、e timely communication 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 comm
24、unications services 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 w
25、ill be more and 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 Inter
26、net rapidly gathering 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
27、 like the email、 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 developm
28、ent tendency of 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 vehi
29、cle, and raises 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
30、the network, founds 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
31、information of 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 ma
32、terials document 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 communication 、 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.
