The education network is introduced as follows, please read it patiently.
CERNET (China Education and Scientific Research Computer Network) is a national academic computer internet invested by the state, managed by the Ministry of Education, and built, managed and operated by universities such as Tsinghua University. Mainly for educational and scientific research institutions, it is the largest public welfare Internet in China. 1996 was recognized by the State Council as one of the four national backbone networks.
CERNET is managed in four levels, namely the National Network Center; Regional network center and regional master node; Provincial education and research network; Campus network. CERN ET National Network Center is located in Tsinghua University and is responsible for the operation and management of the national backbone network. Regional network centers and regional master nodes are located in Tsinghua University, Peking University, Beijing University of Posts and Telecommunications, Shanghai Jiaotong University, Xi Jiaotong University, Huazhong University of Science and Technology, South China University of Technology, University of Electronic Science and Technology of China, Southeast University, Northeastern University and other/kloc-0 universities, and are responsible for the operation, management, planning and construction of regional networks.
CERNET provincial nodes are distributed in 38 universities in 36 cities and in all provinces, municipalities and autonomous regions except Taiwan Province Province.
CERNET has 28 international and regional channels, which are connected with the United States, Canada, Britain, Germany, Japan and Hong Kong SAR, with a total bandwidth of 250Mbps. There are more than 1 1,000 educational and scientific research institutions connected to CERNET (including 800 institutions of higher learning), and there are12,000 networked hosts with more than 20 million users.
At present, CERN ET has basically possessed the networking ability to connect most universities in China, and has completed the upgrading and expansion of eight regional backbone networks of CERNET, and built a large-scale educational information search system in China.
CERNET has built 10 mirror system of information resources of major universities and famous international academic organizations in the world and 12 mirror system of information resources of key disciplines with a total capacity of 800GB, as well as a number of well-known academic websites in China.
CERNET has built a Chinese and English full-text retrieval system with a system capacity of 6.5438+0.5 million pages and a document retrieval system covering 6.5438+0.00 million documents.
CERNET is an important platform for developing modern distance education in China. In order to meet the requirements of the distance education project in the national action plan of 2 1 century education revitalization, CERNET began to build its own high-speed backbone network on 1999. By the end of 2002, CERNET had built a DW DM/SDH high-speed transmission network of 20,000 kilometers, covering nearly 200 cities in China, with a total trunk line capacity of 40Gbps. On this basis, CERN ET high-speed backbone network was upgraded to 2.5Gpbs, and 155M CERNET medium-high-speed regional network connected 35 key cities in China. More than 1000 colleges and universities in China have connected to CERN ET, and the campus networks of more than 1000 colleges and universities have connected to CERNET at the rate of 1000 Mbps.
CERNET is the vanguard of Internet research in China, with strong technical strength. CERNET is a computer internet designed, built and managed independently by technicians. At the same time of network construction, CERNET also pays attention to strengthening network security. 1999, CERNET built the first network emergency response center CCE RT in China and provided services. Up to now, CCE RT team has handled more than 2,000 network security incident reports, effectively ensuring the normal network operation order of CERN ET and promoting the further improvement of CERNET network management level.
CERN ET is also an experimental network for the next generation Internet research in China. Based on the existing network facilities and technical strength, a nationwide IPV 6 experimental bed was established. 1998, CERNET officially joined the next generation IP protocol (IPv 6) trial network 6One, and became a member of its backbone network in the same year. CERNET is the first in China to realize the interconnection with the international next-generation high-speed network INTERNET 2. At present, only CERNET users in China can access INTERNET2 directly and smoothly.
CERN ET is also an important training base for national information network talents. During the Ninth Five-Year Plan, the national key science and technology public relations project "Research on Computer Information Network and Its Application Key Technologies" was built, CERNET researchers and other cooperative units published hundreds of relevant academic papers at home and abroad, and trained a group of professional and technical personnel.
CERN ET has also supported and guaranteed a number of important national network application projects. For example, the national online enrollment system played a very good role in the enrollment of colleges and universities in 2000.
The construction of CERN ET has strengthened the national information infrastructure, narrowed the gap with foreign advanced countries in the information field, and played a positive role in the construction of the national computer information network.
In order to further improve the network operation quality, improve the service quality and expand the service field, in August, 2000, the party group of the Ministry of Education approved the transformation plan of CERN ET: to set up Searle Network Co., Ltd. to be responsible for the operation and maintenance of CERNET backbone network, improve the network operation quality and service level, and develop network value-added services. At the same time, keep the original research system of CERNET unchanged, continue to undertake national research projects, and maintain the leading position of network technology.
The second question. The education network is like that, so slow that even the web pages can't be opened (mainly the web pages of the external network). But you can quickly connect to intranet pages.
Explain external networks and internal networks. For the education network. Sina, Netease, Sohu and other websites are all external networks. Some educational websites, such as your school website, are intranets.
The reason why the external network is slow: the data transmission between the internal network and the external network is through a terminal server (usually the school network center). When you are online, most people are online, and the traffic is relatively large at this time. The server of the school can't handle it, and the speed of the external network is also slow. But the download speed will never be slow, and the download speed of campus network far exceeds that of telecom and Netcom.
The problem of connecting LAN. Generally, a local area network is a building or a building to connect. Because the school network center generally manages the network of 1 building together. So you can play LAN games. Boys' dormitories and girls' dormitories are generally far apart and cannot be connected to the local area network.
Restrict other people's internet speed: impossible. Because your computer is not the host of the network center, only the host can control the network speed of others (for example, a broadband line is diverted through a router, and the computer as the host can limit the network speed of others). Of course, if your hacking skills are high and you can invade the network center, that's another matter.