Campus network [1] is a computer network that provides resources, information exchange and collaborative work for school teaching, scientific research and management under the guidance of certain educational ideas and theories.
Generally speaking, the campus network is a broadband multimedia network that provides teaching, scientific research and comprehensive information services for school teachers and students. First of all, the campus network should provide an advanced information-based teaching environment for school teaching and scientific research. This requires the campus network to be a broadband, interactive and professional local area network. Multimedia teaching software development platform, multimedia demonstration classroom, teacher preparation system, electronic reading room and teaching test database can all run on this network. If a school includes multiple professional disciplines (or departments), it can also form multiple local area networks, which are connected by wired or wireless means. Secondly, the campus network should have educational, administrative and general management functions.
In China, the construction of campus network has developed rapidly in recent years. Up to now, nearly 6,000 schools across the country have built primary and secondary school campus networks. They provide a good example for realizing the sharing of educational resources, information exchange and collaborative work in primary and secondary schools in China. However, with the rapid increase of the number of campus networks in various parts of China, there is an increasing demand for how to realize the sharing of educational resources, information exchange and collaborative work between campus networks.
What is a campus network?
Campus network is a computer network that provides resource sharing, information exchange and collaborative work for school teaching, scientific research and management under the guidance of certain educational ideas and theories. In China, the construction of campus network has developed rapidly in recent years. Up to now, nearly 6,000 schools across the country have built primary and secondary school campus networks. They provide a good example for realizing the sharing of educational resources, information exchange and collaborative work in primary and secondary schools in China. However, with the rapid increase of the number of campus networks in various parts of China, there is an increasing demand for how to realize the sharing of educational resources, information exchange and collaborative work between campus networks. The design goal of campus network is to connect the information resources of different applications with each other through high-performance network equipment, to form a 12000/xpranet system in the campus area, and to access the WAN through routing equipment. Carry out the overall design of campus network: first, carry out object research and demand investigation, make clear the nature and tasks of the school, the needs and conditions of the main system construction of reform and development, and accurately describe the information environment of the school; Secondly, on the basis of applying luxury analysis, determine the service type of the school 12000/xpranet, and then determine the objectives of system construction, including network facilities, site setting, development, application and management; Thirdly, the topological structure and function of the network are determined, and the system analysis and design are carried out according to the application requirements, construction objectives and the distribution characteristics of the main buildings in the school; Fourthly, determine the principle requirements of technical design, such as the standards and requirements of technical selection, wiring design, equipment selection and software configuration; Fifth, plan the implementation steps of campus network construction. The scientific nature of the overall design scheme of campus network should be reflected in whether it can meet the following basic requirements: (1) overall planning arrangement; (2) the combination of advancement, openness and standardization; (3) reasonable structure and easy maintenance; (4) efficient and practical; (5) Support broadband multimedia services; (6) Fast information exchange, cooperative work and image display can be realized. With the development of economy and the implementation of the national strategy of rejuvenating the country through science and education, the construction of campus network has gradually become a basic construction project of a school and an important symbol to measure the informationization and modernization of a school's education. At present, most qualified schools have completed the hardware construction of campus network. Then, for many years, the understanding of campus network is not comprehensive enough, and there are even great misunderstandings. For example, the higher the network construction, the better, the blind pursuit of high investment in construction, the lack of comprehensive planning, development and application of campus network construction; It is considered that the completion of campus network and access to the Internet are equivalent to the automation and informatization of teaching and office, but there is a lack of comprehensive management of campus network, application training of technicians and teachers, and development and accumulation of teaching resources. All these have greatly hindered the practical benefits that campus network should play in school management, education and teaching. Generally speaking, the campus network is a broadband multimedia network that provides teaching, scientific research and comprehensive information services for school teachers and students. First of all, the campus network should provide an advanced information-based teaching environment for school teaching and scientific research. This requires the campus network to be a broadband, interactive and professional local area network. Multimedia teaching software development platform, multimedia demonstration classroom, teacher preparation system, electronic reading room and teaching test database can all run on this network.
Several problems about campus network
1 Security Analysis of University Campus Network
1. 1 Features of the University Campus Network
Compared with other LANs, the characteristics of campus network in colleges and universities lead to serious network security problems and complicated security management. Its characteristics can be summarized as two aspects:
(1) user group characteristics. The users of campus network in colleges and universities are mainly college students. On the one hand, there are a large number of users and a high level of network. With the enrollment expansion of colleges and universities, the number of students in colleges and universities is increasing, and the number of campus network users ranges from thousands to tens of thousands, and they are often concentrated. Learning in colleges and universities is mainly autonomous learning, which determines that college students have enough time to control themselves. Through study, college students have generally mastered some basic computer knowledge and network knowledge, and their computer level is higher than that of ordinary business users. Moreover, they are curious about new network technologies, dare to try, and are usually the most active network users. On the other hand, users' awareness of network security and copyright is generally weak. College students often don't know enough about the serious consequences of network security problems, and some even regard the campus network as their "training ground" and try various attack technologies on the campus network. In addition, due to the lack of funds and copyright awareness, college students use a large number of pirated software and resources on the campus network. The attempt of attack technology and the spread of pirated software not only occupy a lot of network bandwidth, but also bring great hidden dangers to network security.
(2) The characteristics of campus network construction and management. On the one hand, the construction of campus network needs to invest a lot of money, ranging from millions to tens of millions, while the funds of colleges and universities are generally tight. Limited investment is often used to expand the network scale and increase network applications, which can be seen by teachers and students, while the aspects of network security that teachers and students are not easy to see are often ignored or despised. Due to less investment and lack of necessary network security management equipment and software, management and maintenance are difficult. On the other hand, in order to meet the needs of teaching, scientific research, management and students' study and life, colleges and universities have basically established campus networks with gigabit backbone, 100-megabit desktop or even 10-megabit backbone and gigabit desktop. High-bandwidth campus network brings convenience to campus network users, but also greatly increases the difficulty of network management.
1.2 The main network security problems and threats faced by the current university campus network
(1) security vulnerability. User operating system vulnerabilities and application software security vulnerabilities are common in campus networks, which affect the normal use of user systems and the normal operation of the network and pose a serious threat to network security. Once exploited by hackers or viruses, it may even lead to disastrous consequences.
(2) Viruses and attacks. Network viruses occur and spread very fast. Many campus network users fail to install anti-virus software or update the virus database of anti-virus software in time for various reasons, which leads to the proliferation of network viruses, which not only seriously endangers the security of users' computers, but also greatly consumes network resources, causing network congestion and bringing great inconvenience to every user. At the same time, there are more and more attacks from external and internal users, which seriously affects the normal use of campus network.
(3) Abuse of network resources. In the campus network, users abuse network resources seriously. Some users set up proxy servers privately to illegally obtain network services, and some users illegally download or upload them. Some users even surf the Internet constantly every day, and the daily traffic reaches tens of G, which takes up a lot of network bandwidth and affects other applications of the campus network.
(4) spreading bad information. The spread of bad information is very harmful to college students who are forming a world outlook and outlook on life. The information on the internet is mixed, some of which violate human moral standards or laws and regulations. If this information is not filtered and processed, students will have the opportunity to browse unhealthy web pages such as obscenity, gambling and violence in the campus network. In order to ensure the healthy growth and positive progress of college students, measures must be taken to filter and process the campus network information, so that they can contact the bad information on the network as little as possible.
(5) Spam. Spam is very destructive to campus network. It occupies the network bandwidth, causes the mail server congestion, and then reduces the operation efficiency of the whole network. It is also one of the important ways to spread network viruses, attacks and bad information. Although many colleges and universities have established mail servers to provide mail services for campus network users, due to the lack of mail filtering software and related management systems to limit mail forwarding, mail servers have become the target of spam attacks. ......
What is a campus network?
Campus network: The original intention of the school is a comprehensive network of information. Its functions are very extensive.
Which network operator are you asking? This is very simple. You can find a website to measure the network speed first, so that you can get your external network IP, and then directly search Baidu for the IP you get, which is very clear.
What's the difference between campus network and extranet?
What is a campus network?
baike.baidu/view/27505
What does the campus network client mean?
Basic principles of campus network
I. Overview
Computer network refers to a system in which independent computers are interconnected to complete information sharing.
Computer network is the inevitable product of the combination of computer and communication technology, which has a far-reaching impact on the organization and working mode of computer system. A computer disconnected from the network is no longer a computer. No wonder Sun Company put forward that "the network is the computer".
According to the size of network coverage, networks are divided into local area network (LAN), metropolitan area network (MAN) and wide area network (WAN).
Campus network is between local area network and metropolitan area network, generally covering several kilometers.
Campus network system = wiring system+network equipment+computer hardware equipment+system software+application software. The purpose of network system is to share information. According to different functions, the network system can be divided into two parts: the information transmission part, which is responsible for the information transmission between different systems; The information processing part is responsible for information storage and processing. The transmission part includes two subsystems: wiring system and network equipment. The processing part includes three subsystems: computer hardware equipment, system software and application software.
Wiring system is mainly a variety of connecting media between devices in the campus network, which is responsible for information transmission between devices. Network equipment is responsible for information exchange between computer systems, and computer hardware equipment is responsible for information storage and processing under the control of related system software and application software.
What is a campus network?
Place a core switch in the center of the campus network. The internal servers in the campus network are connected to the central switch through TG-3269 Gigabit network card, which eliminates the most likely bottleneck in the network and meets the high-speed access requirements of the servers in the campus network. TL-SL3226P Gigabit network management switch, as a network distribution layer switch, has the characteristics of high speed and multifunction, and plays a vital role in the whole network connection. Its VLAN division function can isolate the corresponding users in the campus network. TL-SL3226P also has the function of controlling the bandwidth of a certain port, and supports some users' flexible charging methods. As for the access layer switch, TP-LINK intelligent switch TL-SF _ 2 xxp or ordinary switch TL-SF _ 1xxx is selected to connect workstations distributed in various places to access the campus network. In the construction of campus network, according to the practical application and long-term design, the campus network center adopts high-performance core modular switch to provide high-performance switching function for the whole campus network. If funds permit, a central exchange can be added as a dual machine for mutual fault-tolerant backup. The two core switches are connected to realize mutual hot standby, and there is no single point of failure in the whole backbone switching system. It is a fault-tolerant scheme with complete redundancy of high-grade backbone switching, which ensures the high reliability of the network. Network reliability is realized by redundant network interconnection structure and rapid fault recovery technology, which ensures that any switch in the core layer will not interrupt the operation of the network and ensure the reliable operation of the university network system. In the school network center, the distribution layer switch TL-SL3226P is connected by optical fiber interface through downlink Gigabit. When there are many information points in a building, TL-SF2226P+ and TL-SF 1024 switches can be cascaded downwards to increase network nodes, which can be flexibly expanded. At the same time, users can be directly connected through the 100M port, and the bandwidth of 100M can fully meet the broadband services such as high-speed Internet access and video on demand. In short, from the user's 1000M access and1000 m connection to the central router switch, all layers of equipment support line-speed switching, providing users with a real high-bandwidth network and providing strong support for future high-bandwidth broadband services. Among them, the distribution layer switch TP-LINK TL-SL3226P Gigabit Ethernet switch backplane bandwidth is 8.8G, which meets the total bandwidth requirements, ensures high-performance forwarding, and has powerful network management functions. By setting VLAN (port VLAN and 802. 1Q tag VLAN) or statically binding MAC address to support 802.6438+0x, network transmission and network security can be improved. Support port TRUNK can increase the bandwidth of the network backbone by aggregating with the port of the central switch; Support IGMP monitoring of workgroup management protocol, and be competent for multimedia applications such as video on demand; It can effectively reduce the network traffic in multicast (such as video-on-demand), and provide various management functions through the RS232 interface of the console: SNMP management, Web-based management, TELNET and out-of-band management, so as to integrate the access information points of each layer, meet the actual needs, realize an elastic network and meet the needs of different nodes.
What does 360 free wifi campus network mean? Tell me more specifically.
Campus network mode is to adapt to campus broadband, which is different from home broadband. The two modes are different and have limited equipment, so they are open to adapt to the campus broadband network.
What is a campus network?
Literally, the campus network is a computer network within the campus, but this statement is too narrow to fully reveal the function, significance and connotation of the campus network. The Internet is called the global information expressway. According to this statement, some people say that the campus network is the information expressway within the school. This statement is very simple. We believe that the campus network is a computer network based on modern network technology, multimedia technology and Internet technology. On the one hand, it connects the internal subnet of the school with computers scattered all over the campus, on the other hand, it serves as a bridge to connect the internal network of the school campus. Campus network serves the teaching, management, office, news exchange and communication of the school. To do this, there must be a large number of advanced and practical application software support, and the full combination of software and hardware is the premise for the campus network to play its role. It is generally believed that the campus network consists of hardware and software. Figuratively speaking, hardware is the road and software is the car. Without hardware as the foundation and support, the car will lose its operating environment; When there is no car or no car, the hardware is just a pile of furnishings, which can't play a role at all. Software and hardware depend on each other and promote each other. Campus network brings not only changes in means, but also comprehensive changes in school education concepts and models. Some people worry that the development of information technology will weaken the role of teachers. We believe that the adoption of technology and the construction of campus network will not weaken the role of teachers at all, but will greatly change the role of teachers and the educational model of schools.
What is the way to surf the Internet on campus network?
How to surf the Internet on campus network? You have to ask the staff in the place where the campus network is handled. You asked how the campus network was connected to the Internet. Campus network access methods are not necessarily the same around the world, I think.
The campus must be an intranet IP.
100M is the speed of your network card, which has nothing to do with the internet speed.
Your network card may be10m/100m/1000m.