On the campus network in the application of P2P technology and management

Abstract This paper analyzes the concepts and principles of P2P technology, P2P technology described in the campus network Applications and management strategies.

Keywords: P2P technology campus network security traffic control
Concept and structure of the P2P
1.1 Concept
P2P technology (peer-to-peer technology that point, also known as peer Internet technology, is a new network technology, network participants rely on computing power and bandwidth, rather than rely solely on only a few central server.

1.2 P2P technology has the advantage
First, the expansion has a strong force: aggregation by low-cost resources to interact, resulting in the whole greater than its parts.

Second, with lower cost: using the existing infrastructure, cost reduction and distribution
Third, the anonymity and privacy: on the other end to allow its data and resources in the autonomous control of a large
1.3 Network structure
(1) a centralized P2P network shown in Figure 1 This model has a center-oriented features, to find efficient and easy to manage; but the server load is big, there is a single point of failure problem.

(2) a distributed P2P network shown in Figure 2, it will be the P2P concept a step further. This model does not have a dedicated server, each peer node are similar in function. This P2P network model to solve the single point of failure problem, but lack the ability to quickly search and strong scalability.

(3) hybrid P2P network hybrid P2P combines centralized and distributed P2P model has the advantage in the design and processing capabilities have been further optimized. Most of the current Application of P2P technology for this model.


2.P2P the Application of technology in the campus network
Office communication is P2P technology in the campus network, the most common Applications, such as QQ, MSN and so the use of P2P technology. The use of P2P technology can weaken or even get rid of dependence on the central processor has to send fast, simple, powerful, and good stability. The instant messaging software can also be online at any time to know whether the other two sides is completely point to point direct communication, the central server only help to complete the initial contact between the nodes based on P2P technology, online communication can be very easy to text or picture form of real-time exchange, the majority of teachers and students alike.

Now the campus network based on P2P technology, video on demand system to solve the problem of the video does not play smoothly.

Campus network to download commonly used in the traditional way of FTP and HTTP, if the file uploading and downloading using P2P technology, as each person is both a client and a server, Information can be fully shared, you can upload your own teaching resources to the campus network , while enjoying the other teachers of Information resources, to teaching a great deal of convenience.

3 At this stage the Application of P2P technology campus network problems
P2P network and students bring to campus high-speed downloads, high-definition video, the convenience of instant communication, but also bring a range of issues, such as the accelerated spread of the virus, network bandwidth-intensive and other issues.

In the current campus network users to share commonly used in fixed broadband access networking model, P2P network bandwidth intensive problem is especially serious in the absence of campus P2P application control and management of cases, P2P networks usually take up 60% to 90 percent of the bandwidth, in extreme cases almost the entire occupied bandwidth real-time schools invested heavily in teaching, research and other work is still not guaranteed. Links to free download http://www.hi138.com the rapid development of P2P the same time, P2P has become a new target for hackers, because of its openness and autonomy, making the campus network security to become a challenging task in the C / S (Client / Server) system, the server is reliable , reliable, and P2P systems can not ensure that each node has these characteristics because in P2P environment, the system allows any node to join the network, regardless of whether it is malicious nodes.

4.P2P application control and management
4.1 Flow Control
Currently there are major popular BT, Thunder and other download software, QQ, Skype and other instant messaging software, Tudou, Youku and other video sharing audio and video software, and PPStream, PPLive and other P2P streaming media software, these applications to the Internet, bringing rich in network, while living, eating a lot of network bandwidth, seriously affected the normal teaching, which requires control of bandwidth traffic can be data protocol, content analysis, according to the internal characteristics of the bandwidth restrictions and connection limits, and then with the campus network user authentication, the user groups, allocate bandwidth according to different needs.

4.2 P2P application blocking ports to restrict certain
Since the burst properties of the TCP protocol, individual users can easily take up a lot of resources, need to adopt effective measures to limit such behavior, to prevent unexpected application of the network. Then you can block IP to restrict certain users, but mainly for P2P networks use a fixed port applications, but with the technology, a variety of different ports used by P2P software, so the use of this method is very limited, so take too many resources need to control the agreement, abuse of bandwidth for P2P applications, according to network traffic conditions, to limit the maximum bandwidth.

4.3 security antivirus
In addition to bandwidth issues, network security issues, but also P2P applications can not be ignored. Then all the user needs in the campus computer network installed on the network version of the antivirus software. Online version of antivirus software is the development trend of the network itself as a protective mechanism optimization. With it, the network management center personnel can not participate in the case of end users directly from the console configuration, management, and real-time monitoring of the entire campus network anti-virus situation. This way you can effectively monitor the entire campus network terminal machines, while some non-professional staff and viruses play a very weak sense of discipline and strong protective effect, thus avoiding the virus to enter the campus network. largely solve the P2P network application security risks posed by the problem.

5 Conclusion
Campus network in the number of P2P applications increasing flow also showed a gradual growth trend in this case, in order to protect the normal teaching, research and management work, it must be effective P2P traffic monitoring and management. must be targeted to the choice prohibit or restrict P2P applications strategy, to ensure that the campus network and efficient and stable for the education and teaching services. So with the development of technology, increasing user awareness of security, P2P technology will gradually mature, so Campus Network Application will be more popular and improved.

References
[1] Shao Zeyun. Analysis of P2P technology in the campus network applications [J]. Agriculture Network Information, 2010, (1) :93-95
[2] Song Fang. P2P technology research and application [J]. Xiangtan Normal University (Natural Science), 2009,31 (4) :70-72
[2] Hao Ping. Vocational campus P2P traffic monitoring and management strategies [J]. Jinan Vocational College, 2009, (5) :98-100 Links to free download http://www.hi138.com