In recent years, with the rapid expansion of contemporary information technology to the field of education, the way of acquiring and imparting knowledge has undergone revolutionary changes, and at the same time, the functions and objectives of education, teaching methods and models have also undergone profound changes. At present, the campus network project to promote education informatization in all parts of the country has also been put on the important agenda. As the basic project of campus network information platform, the optimal design of campus network is the primary consideration. Of course, the purpose of building a campus network is to use it better and faster.
The campus network in 2 1 century will make better use of multimedia technology, network technology and virtual reality technology, and introduce them into the classroom to show the teaching effect that traditional teaching mode can not achieve and simulate various ideal models; Give full play to the integration, control and interaction of modern information technology; Comprehensive processing of multimedia information can make words, images, graphics and animations form high-quality images and sounds, so that they can vividly show the teaching content, thus improving students' understanding and memory, thus improving the quality and efficiency of learning and achieving the purpose of optimizing the teaching process and improving the teaching quality. Because the campus network has good interactive performance, students can freely carry out personalized learning.
The construction of campus network is mainly for teaching application, and multimedia-assisted teaching and multimedia classroom are the core of teaching application. Network construction should consider the characteristics of multimedia information, such as large amount of information and sensitivity to time delay. Students use the network to do their homework, teachers should dial-up at home to access the school network, and the information of student status management is transmitted online, so we should also consider the security of the network to prevent hackers from destroying the network; Campus network is a tool for teachers, students and office workers with different knowledge levels to help us improve our teaching level, office efficiency and interest in learning. Therefore, the application and management of network equipment should be simple, friendly and not too professional.
After fully analyzing the current application of campus network in primary and secondary schools and the requirements of these applications for the network basic platform, combined with the current advanced and practical development of network technology, Netgear Company of the United States summarized the technical requirements for the current campus network construction in primary and secondary schools:
1. Building a high-speed campus LAN ―― laying a solid foundation for multimedia information transmission.
The backbone of the campus network (that is, the connection between the central switch and the secondary switch) adopts Gigabit Ethernet technology, and gigabit optical fiber can be used for remote teaching points.
10/ 100M switch accesses all information points.
The connection between the central switch and the main server in the park adopts 10 Gigabit Ethernet connection (minimum).
2. Broadband interconnection between campus network and Internet.
Due to the rise of broadband access (such as ADSL, broadband metropolitan area network, etc. ), generally need broadband access router to realize the secure interconnection between campus network and Internet.
In order to protect the safety of users in the campus network to the greatest extent, it is generally required that the access router has the function of a real firewall (such as a connection-based state packet detection firewall) to ensure safe broadband internet access.
3. Construction of WLAN
In order to make it easier for students and teachers to access the campus network, wireless local area networks can be built in some areas where wiring is inconvenient or the wiring cost is too high. The establishment of wireless LAN can be used as a very beneficial supplement and extension of wired LAN.
The latest standard IEEE 802. 1 1a/b/g wireless LAN solution.
Wireless LAN can also let students and teachers experience the latest network technology.
4. The construction of campus network remote access service.
With more and more remote users (such as surfing the Internet at home and accessing the campus network remotely) needing to access the resources inside the campus, the campus network needs to provide remote access services.
However, with the popularization of broadband access, we should adopt a more cost-effective VPN scheme, and try not to use the original traditional schemes such as analog modem and telephone line PSTN to realize remote access.
5, network equipment requirements
Because the education industry, especially primary and secondary schools, has certain requirements for price orientation, and the daily system maintenance is mainly simple, it also puts forward high requirements for the cost performance and convenience of the whole system, with simple application and management and friendly interface.