A case study on the collapse of campus network

With the development of information technology and more and more services and applications need the support of the network, the vast number of educational institutions have to build their own network, the primary and secondary schools are the same, basically in Beijing all primary and secondary schools, including suburban districts and counties have established their own school intranet, WWW service, mail services, Management information System and other applications in full swing. Please follow the author to come up with the actual combat to judge a primary school network framework structure, thus extrapolate to understand today's schools, especially primary schools such a small scale school network topology.

The author contacted this elementary school scale is not big, the teacher strength is general, therefore the network topology structure is not complex. School server only two, office teacher computer about 20, the school has a student room, including machine room teacher Machine number is 21 units. At present, schools in order to save money cost to adopt ADSL dial-up way to connect the network. (as pictured)

First, the network topology status:

In the current simple network structure, the school server only two, the future school connected to the Education network will assume the school internal IIS and DHCP and DNS resolution work, but now because of the ADSL line, so the DHCP and DNS resolution services are not open, Replaced by the Beijing Management Information System CMIs application, is responsible for the management of student IC card and electronic Student card information.

Computer Room A total of 21 computers, the teacher computer through the broadcast software to the student Computer Management, usually students on the information technology and computer courses are also carried out in this room. In addition, the office computer has 20 units, which are connected to another real 3550 switch.

The last school computer through a machine room dial-up computer connection ADSL access to the external network, the whole school used three switches connected to nearly 50 computers.