campus
The construction of campus network is imperative. The information age is booming, computers are becoming more and more powerful, and application software makes computers easier to use. They are rapidly changing the way people live, study and work, and people can obviously feel this change. In short, the whole world is undergoing a profound change. In this era of change, everything is changing, and education, as the foundation of other industries, will certainly change, and it should become earlier and faster. In a good campus network, people use computers and networks to work, communicate and study. Computers have changed people's teaching methods as well as their learning methods. These can only be done by campus network. The society is changing rapidly, so we must keep pace with the times. Therefore, if economic conditions permit, the benefits of building a campus network as soon as possible will be significant and long-term. They are rapidly changing the way people live, study and work, and people can obviously feel this change. In short, the whole world is undergoing a profound change. In this era of change, everything is changing, and education, as the foundation of other industries, will certainly change, and it should become earlier and faster. In a good campus network, people use computers and networks to work, communicate and study. Computers have changed people's teaching methods as well as their learning methods. These can only be done by campus network. The society is changing rapidly, so we must keep pace with the times. Therefore, if economic conditions permit, the benefits of building a campus network as soon as possible will be significant and long-term. In the garden network, people use computers and networks to work, communicate and study. Computers have changed people's teaching methods as well as their learning methods. These are just school conditions. 2. Application characteristics of campus network
The characteristic of campus network is to connect multiple computers distributed in different locations on campus, communicate with each other according to network protocols, and share software, hardware and data resources. Providing abundant education and teaching information and resources is the vitality of campus network. Campus network has the advantages of short distance, less delay, low relative cost and high transmission rate. Its underlying protocol is simple, and the control selection is greatly simplified, so it has the characteristics of simple networking and easy implementation. The functions of the campus network are mainly embodied in the following four aspects.
(1) information transmission.
This is one of the most basic functions of campus network, which is used to transmit all kinds of information between computers, so that computer users scattered in different locations on campus can carry out centralized control and management. The establishment of a network server in the school affairs office can provide various teaching resources for the whole campus network and comprehensively manage these resources.
(2) Enjoy resources.
(1) Enjoy information resources * * *. It is easy to connect the campus network to the Internet by accessing ddn or isdn. In this way, the computer terminals in the network can not only exchange information resources, but also enjoy the related data on the network server and the inexhaustible huge information resources on the Internet. The role of campus network in teaching activities will also be doubled.
(2) Enjoy the hardware resources. Computers in the network can be backup machines for each other. Once a computer breaks down, its tasks will be replaced by other computers in the network. When a computer in the network is overloaded, the network can hand over new tasks to idle computers in the network to complete.
(3) Teaching is convenient.
The network can carry out multimedia teaching with pictures and pictures, can replace the language laboratory for more vivid language teaching, and can also provide a good teaching environment by using a large number of ready-made teaching software, which can not be achieved by any previous teaching means. Campus network can not only carry out online teaching on campus, but also connect with large external networks conveniently, forming a broader network interactive learning environment.
Third, the campus network demand analysis
With the continuous development and popularization of computer multimedia and network technology, the construction of campus network information system is very necessary and feasible. Mainly manifested in:
1. At present, the campus network information system has developed to the stage of inter-school interconnection, international interconnection, static resource sharing, dynamic information release, distance teaching and collaborative work, and the development has put forward higher and higher requirements for the modernization of school education.
2. With the increasing amount of educational information, schools, families and educational management departments at all levels have a growing demand for computer management of educational information and educational information services. Whether an individual has the ability to acquire and process information is the decisive factor for his successful entry into the professional world and integration into the social and cultural environment. Therefore, the school should train all students to have the ability to control and master this technology. On the other hand, information technology, as an educational tool for teenagers, also provides them with unprecedented opportunities. New technology and its advantages in teaching provide many opportunities. In particular, the use of computers and multimedia systems is conducive to taking a personalized road, and each student can develop at his own pace on his own personal learning path.
3. Educational and scientific research departments, software development units, teaching equipment suppliers and schools at all levels in China are constantly developing and providing various software and multimedia systems running on the network. These systems are more and more intuitive and practical, and they urgently need a network environment.
4. The need of modern education reform. The introduction of computer into all aspects of campus network teaching has caused great innovation in teaching methods, teaching means and teaching tools. It plays an inestimable role in improving the quality of teaching and promoting the development of China's educational modernization. The network also provides an effective way for school administrators and teachers to obtain resources and work together. There is no doubt that campus network is a powerful means for schools to improve management level, work efficiency and teaching quality, and it is also a basic tool to solve educational problems in the information age.
5. With the development of economy, the investment of schools at all levels in China is increasing; With the rapid development of computer technology, the prices of corresponding products are declining. At the same time, people's awareness level and economic strength are also constantly improving. A large number of computers have entered schools and families, making it completely feasible for computers to be used in educational information management and information services.
The third chapter is the design objectives and principles of campus network system.
1. Design goal of campus network system
In the era of knowledge economy and digital existence, campus network plays an increasingly important role in resource sharing, knowledge dissemination, education management, etc. Its design and construction should be based on a high starting point and economical and practical standards. Specifically, it should be an integrated network with broadband IP network as the goal and integrating data, voice and video; In order to improve the reliability and security of the network, the backbone network needs optical fiber wiring, and the campus network should realize the function of virtual local area network (VLAN) to ensure the good performance and network security of the whole network; The backbone switch should have high packet switching speed, and the whole network should have high-speed three-layer switching function; The backbone network should adopt mature and reliable fast Ethernet and Gigabit Ethernet technologies as the backbone of the campus network; Campus network should choose advanced network management software and establish a perfect network management system; In terms of equipment, we should choose the equipment of network manufacturers with successful cases of campus network, and provide interfaces for internet users, dial-up users and mobile users. The network should also have good expansibility.
2. Design principles of campus network system
Online resources for teaching and research; Students can browse and query online resources conveniently to realize distance learning; Learn information processing ability through online learning. School administrators can conveniently manage educational affairs, administrative affairs, student status, finance and assets, and at the same time realize the exchange of information and data between management levels, realize the automation of online information collection and processing, and realize the sharing of information and equipment resources. Therefore, the construction of campus network must have a clear construction goal. The overall design principle of campus network is:
Openness adopts an open network system to facilitate the upgrading, expansion and interconnection of the network; At the same time, when selecting servers and network products, the international standardization of network protocols supported by products is emphasized;
Scalability ensures the scalability of the network system from the selection of backbone network equipment and its modules, the number of slots, management software and the overall structure of the network, as well as the openness of technology and support for related protocols.
Manageability provides powerful network management functions by using graphical management interface, simple operation mode and reasonable network planning strategy; Make daily maintenance and operation intuitive, convenient and efficient;
Secure interconnection between internal networks, internal networks and external public networks, using VLAN/ ELAN and firewall to control access to ensure network security;
Investment protection: select network equipment and servers with high cost performance; The adopted network architecture and equipment fully consider the easy upgrade, which can protect the original hardware equipment and software investment to the maximum extent;
Easy-to-use application software system must emphasize ease of use, humanization, help and query functions, and users can query through the Web.
(A), practicality
It is necessary to proceed from the actual situation and achieve the purpose of convenient use and practical use. Interconnection between internal networks, internal networks and external public networks, using VLAN/ ELAN, firewall and other control access to ensure network security;
(2) Advanced nature
Adopt the current international advanced and mature mainstream technology and adopt the relevant international standards of the industry.
(3) Safety
Take various effective security measures to ensure the safe operation of network systems and application systems.
(4) Scalability
Adopting protocols and interfaces that meet international and domestic industrial standards makes the campus network open and easy to connect with other networks and information resources. And nodes and subnets can be added at different levels of the network. Generally, it includes the principles of open standards, technologies, structures, system components and user interfaces.
(v) Manageability
When designing the network, fully consider the future management and maintenance of the network, and choose a network operating system that is easy to operate and maintain, which greatly reduces the burden of management and maintenance during the network operation. Intelligent network management is adopted to minimize the operation cost and maintenance cost of the network.
(6) High performance-price ratio
Combining with the increasingly advanced technology and the specific situation of the campus, we will formulate economic solutions to fully ensure the economic benefits of the school on the basis of meeting the needs. Adhere to the principle of economy, and strive to do more things with the least money, in order to get the maximum benefit.