专业英语论文_专业英语论文1

专业英语论文由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“专业英语论文1”。

课程论文

院系 物理与电子工程学院专业 电子信息工程班级 电工1111班学生姓名 简东阳学号2011140131任课教师 罗倩倩

2013 年12月26日

Switching technology present situation and development trend

Jiandongyang

Hubei university of Arts and Sciences

420683a0196.cdb@sina.cn

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 technology 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 technologyThe present situation of the exchange of technologyThe rapid 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 network 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, there 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.switching technology of A single traditional layer 2.More traditional layer 2 switching technology, is a special single, it contains only the data 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 acce port, low price which the three layer 2 switching technology 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 technology has now become a main force of the construction of multiple busine 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 multiple 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, layer 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 application 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 forwarding 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 busine to consumer e-commerce, market sales of unmanned automation, on-line customer support, personnel construction and planning, customer service, firewall load balancing broadband and intelligent filter content and so on, can be dabble in by layer 7 switching technology.The development trend of switching technology

Research in recent years the development of the exchange network architecture and related 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 structure 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 ma exchange network, multistage switching structure will be the first choice, 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 busine functions, at the same time can quickly 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 structure instead of the single stage exchange structure;

(2)Reduce the internal blocking of multistage switching structure;

(3)Build more ma 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 generation network technology is gradually mature and stable.Believe that the exchange technology will be developed in network technology and busine development of the evolving proce.And in the busine operation and competition in the future, differential operators will also play an increasingly important role.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 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, operators 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).