Switching technology present situation and development trend英语论文.doc

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1、Switching technology present situation and development trend Abstract：Direction in the future, more extensible features will become the important characteristics of a new generation of Internet, the exchange of technology, will be as a key technology to host this extensible features. Switching techn

2、ology in scale, function, performance, safety and service and other aspects have better extensibility features, will be a new generation of Internet architecture in the future.Keywords: Network technology ;The Internet ;Switching technology1 The present situation of the exchange of technology The ra

3、pid development of network technology, Ethernet is always dominant. However, with the deepening of the network technology application, the network development scale and speed are speeding. Not only the speed of the LAN got improved, gigabit Ethernet also gradually became popular. attention to networ

4、k of high reliability, high performance, easy maintenance and reduced cost, and these factors is dependent on the using kind of networking technology; Equipment vendors would on the basis of not harm the interests of the user network functions and pursue the considerable profit. About the network, t

5、here have been a mature traditional layer 2 switching technology, and the function of the routing layer 3, and a high service level of network layer 7. 2 switching technology of A single traditional layer 2. More traditional layer 2 switching technology, is a special single, it contains only the dat

6、a link layer forward. Layer 2 switching technology is mostly used for small local area network (LAN), the machine Numbers keep in 20 or 30 sets of the following is the security of the network environment, fast switching function, multiple access port, low price which the three layer 2 switching tech

7、nology has has solve the problem that the small network users.2.1 The third layer switching technology with routing function In order to solve the problems of the broadcast domain, for the first time in 1997 the third layer switching technology with routing function appeared. Layer 3 switching techn

8、ology has now become a main force of the construction of multiple business fusion network. Using a large local area network (LAN), can increase the dangers of broadcast storm, in order to reduce the harm, we must divide a large local area network (LAN) according to the function or the region into mu

9、ltiple small local area network (LAN), so that it can reduce the harm of broadcast storm. If only use layer 2 switching technology, a large number of visits between subnets cannot be achieved. Modified by the layer 3 switching technology (layer 3 switches) is very good to solve the problem. Today, l

10、ayer 3 switching technology is more and more mature, and also in constant development and innovation, it occupies a more and more important status in the network.2.2 layer 7 switching technology with the function of network service Unlock every layer encapsulates of each data packet, identify the ap

11、plication layer information at the same time, is the functions of layer 7. Now, many service providers focus gradually shifted to how to make full use of broadband resources and how to manage the Internet application, content. layer 7 switching technology can handle network application layer data fo

12、rwarding well, the network service level can be improved and it also can make the network administrators and make the users have a lower cost to optimize the network resources. Whether it is business to consumer e-commerce, market sales of unmanned automation, on-line customer support, personnel con

13、struction and planning, customer service, firewall load balancing broadband and intelligent filter content and so on, can be dabble in by layer 7 switching technology. 3 The development trend of switching technology Research in recent years the development of the exchange network architecture and re

14、lated algorithms, is mainly to study of switching technology. Switching network is roughly by single-stage exchange structure and multiple exchange structure of two kinds of structure.Single-stage exchange in the performance and scale structure is hard to expand and develop, so the new exchange stru

15、cture instead of a single-stage exchange structure is imperative. Compared with single-stage exchange structure, multi-level exchange structure has a very big advantage is the extensions is good, if you want to achieve more mass exchange network, multistage switching structure will be the first choi

16、ce, and it is also considered very promising . The system structure of open-ended standardization and data packet based will gradually become the next generation network of the new definition, this is also to develop more and more effective applications and business functions, at the same time can q

17、uickly adapt to the market. achieve higher performance and greater scale, is the main goal of the studying exchange technology. In order to achieve this goal,it is bound to reinforce the research of the project, the developing trends in the future may have the following:(1) Multistage switching stru

18、cture instead of the single stage exchange structure;(2) Reduce the internal blocking of multistage switching structure;(3) Build more mass exchange network. The application of new technology requires a lot of time to continue to improve and perfect.According to the report, the development of next g

19、eneration network technology is gradually mature and stable. Believe that the exchange technology will be developed in network technology and business development of the evolving process. And in the business operation and competition in the future, differential operators will also play an increasing

20、ly important role.4 Conclusion High technology development change rapidly, more and more quickly. Switching technology has become more intelligent,order to reduce the cost, and make the network of high reliability, high performance, easy to maintain and extend the guarantee,Switching technology from

21、 the initial layer 2 s developed to the layer 3 and now 7 layer,it is still in the continuous development and expansion. Believe that the network intelligent management is not far from us. Although there is a problem but it will not hinder the exchange of technology application and development, oper

22、ators and equipment suppliers will make these problems get very good settlement,constantly positive test, unceasingly perfect, eventually there will be a good result.References:1 Feng Huibin WengYingJing. Based on the application of modern switching technology course teaching reform research J. Journal of education teaching BBS, 2012 (S4).2 Wu Wenjing. The next generation network of the soft exchange technology J. Journal of railway signal engineering, 2005 (01).