Multimedia classrooms are formed by applying computer and network technology to the field of teaching. They combine images, sounds, texts, animations and other media to provide students with rich and vivid teaching materials to achieve a new type of classroom effect. However, it also increases the complexity of its application and the difficulty of management. The school adopting multimedia teaching not only needs a teaching software with complete functions, simple and easy to use, convenient teaching and improving teaching quality, but also needs a system platform that can be managed uniformly and easy to maintain. The unification of the two can be more conducive to the popularization and application of multimedia teaching system.
At present, the school's multimedia teaching system generally uses a PC as a student machine, and the student machine is only used as a machine for displaying teaching content and provides students with simple operations without requiring too much configuration. PCs are expensive, with a utilization rate of only 10% to 30%, and are generally eliminated in 3-5 years. The cost of upgrading hardware and software is high, resulting in a great waste of resources. And because of funding difficulties in many schools, multimedia teaching has become a piece of chicken ribs. At the same time, the PC is distributed management, the equipment is scattered, the PC is relatively personalized, and the user's arbitrariness is large. These have brought great management difficulties to the system administrator and caused a lot of work to maintain the PC.
Multimedia teaching system is built on the network, they are inseparable. Without the smoothness of the network, there is no normal use of the teaching system. The large amount of data flow between the PC and the server is easy to cause bandwidth pressure. The PC has a large number of storage devices locally, which is easy to be infected with viruses and spread in the network and suffer hacker attacks. These will eventually lead to network paralysis and threaten system security. .
As multimedia teaching is becoming more and more widely used, the software products on the market are also mixed. Many multimedia teaching softwares only add multimedia functions purely, and do not give full play to the function of multimedia in teaching, which provides students with a perceptual learning environment. At the same time, due to the complex operation of the multimedia teaching system, it sometimes reduces the teaching efficiency.
For the shortcomings in multimedia teaching, Lingyi NC is used as the overall solution for student-side equipment and Huifeng Integrity's multimedia teaching software. This solution mainly solves the main problems involved in the above:
1. The client adopts Lingyi NC, which reduces TCO (total cost of ownership), including software and hardware purchase, installation and upgrade costs, maintenance costs and user use costs. The price of Lingyi NC is lower than that of PC, the configuration is simple, there is no extra peripherals and local storage, no client software is needed, all the work is done on the server, Lingyi NC is only used as a display desktop and I / O device The data flow does not put pressure on the network bandwidth and does not threaten the security of the system network; and the software and hardware of the Lingyi NC do not need to be upgraded, the operation is very convenient, and the user's use of the NC is also controlled to the maximum extent on the server side. It reduces the workload of the administrator and also facilitates the user's use.
2. Multimedia teaching software adopts Huifeng Integrity's multimedia teaching software. Multimedia teaching software not only provides teachers with good teaching content and teaching methods, but also provides students with a better way to communicate with teachers, and Huifeng integrity multimedia teaching software also has better management and control functions.
The software system of the overall solution adopts a new three-tier C / S structure based on Lingyi NC and terminal server, which is different from the traditional C / S structure. The system structure of the network adopts the switched 100BASE-T fast Ethernet based on TCP / IP protocol as the backbone network, and sets up a main switch to connect the gateway and the domain server through twisted pair to form the central computer room. The sub-switches installed in each classroom are connected down through the twisted pair. Each classroom is equipped with a terminal server, an application server for teachers, and several student computers. The Lingyi NC for each student is connected together through the switch set, and the network The topology is star-shaped. The entire network is connected to external networks through dedicated lines. The topology diagram is as follows:
The core of the system hardware is:
Lingyi NC: Student-side equipment Terminal server: Provides overall services for student-side equipment Teacher-side server machine: Provides teaching process, communicates with students and controls student-side The overall solution provides a stable hardware platform for multimedia teaching system. Thanks to the embedded operating system, Lingyi NC has stable performance, simple and easy operation, centralized management and maintenance, and enhances the stability and manageability of the network system. At the same time, Huifeng's honest multimedia teaching system also provides schools, teachers and students with a good online teaching tool.
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