How to write a paper (model essay) on the formation and management of local area network? Thank you.

Talking about wireless local area network and its practical application Abstract: People live in a "mobile" world, and the emergence of more and more mobile products shows that people have an increasing demand for fast data access. In this era of "network is computer", LAN has become an indispensable tool to improve work efficiency and productivity. With the wide application of wired network, wireless network technology with the advantages of fast, efficient and flexible networking is also developing rapidly. This paper introduces some basic knowledge of WLAN, such as concept, communication system, standard and hardware, and gives an example of WLAN networking. Use the method from the shallow to the deep, and try to use the illustrated method to make readers have a preliminary understanding of WLAN and deepen their understanding. Key words: technical characteristics, classification, standards, hardware 1 research background 1 significance and purpose of the research topic. We are in an era of publicizing individuality and advocating freedom. The feeling of freedom should be unrestrained, and the free network should also get rid of the fetters of complicated lines, at least limited by changes in the external environment. With the change of the times, people's lives and workplaces move more and more frequently, so mobile devices such as mobile phones, notebook computers and PDA are popular, people rely more and more on the network, and local area networks are becoming more and more popular. However, wired networks are often limited by location, and the workload of wiring and rerouting is heavy, and the lines are easy to be damaged, so the nodes in the network cannot be moved, especially when connecting nodes that are far apart. Laying dedicated communication lines is difficult, expensive and time-consuming. As for mobile office, it is almost impossible in this network environment. The traditional local area network can no longer meet people's needs for mobile and network, so the wireless local area network came into being. Although WLAN can not be completely separated from wired network, in recent years, WLAN products have gradually matured and played an increasingly important role with its high-speed transmission ability and flexibility. 1.2 research topic content and analysis The development of wireless computer communication is closely related to the application forms of computers, which can be roughly divided into three stages. Namely mainframe networking stage, microcomputer networking stage and mobile computing networking stage. The characteristics of the first two stages of wireless computer communication are that the wireless medium is only used to overcome geographical obstacles or avoid the complexity of wiring, making the network installation simple and easy to use, and the mobility of nodes in the network is not important. However, with the widespread use of powerful portable computers after 1990s, people need to connect their portable computers to the office LAN or other public networks outside the office. In this way, computer networks or mobile computing networks that support mobility become more and more important. Wireless local area network: Wireless local area network is the product of the combination of computer network and wireless communication technology. It can be defined as a communication system that uses radio frequency, microwave or infrared rays to interconnect devices in wired areas. Wireless LAN is a wireless communication network between computers, so it is necessary for us to know the development history and present situation of wireless computer communication. The history of wireless communication is very long, but the history of civil wireless computer communication is not long. In particular, wireless computer communication, which gives full play to the "mobility" characteristics of wireless communication, only appeared in recent years, and the so-called "mobile computing network" only appeared in recent years. Advantages of wireless local area network Whether wireless network can replace wired network depends on three or two beautiful cases, not to mention an expert's suggestion. The main reasons are roughly three aspects: network layout transformation, expansion and maintenance cost. Related Technologies of WLAN In a typical WLAN environment, there are some devices that send and receive data, which are called access points (AP). An AP can connect multiple wireless users in the range of tens to hundreds of meters. When both wired and wireless networks are available, AP can connect with the traditional wired network through standard Ethernet cable as the connection point between wireless network and wired network. The end user of WLAN can access the network through the wireless network card. The hardware devices of WLAN include AP, access point (AP), LAN adapter, bridge and router. The best way to comment on a technological advantage is to discuss its potential use value. In China, the technology and products of WLAN are relatively new in practical application, but compared with wired networks, WLAN has the advantages of convenient installation, flexible use, easy expansion, low price and little radiation. Because of its irreplaceable advantages, wireless will be quickly applied to places that need to connect to the Internet and roam between networks, such as airports, hotels, exhibition halls, enterprise mobile office systems, financial services and tourism services, and it is not easy to wire. 3.7 Summary It can be seen that the emergence of wireless networks is to solve the insurmountable difficulties of wired networks. Although wireless network has many advantages, compared with wired network, wireless LAN also has many disadvantages. Wireless networks are slow and expensive, so they are mainly aimed at users with specific needs. At present, wireless local area network can not be completely separated from wired network. Wireless network and wired network are complementary rather than competitive, and complementary rather than substitute. However, we should also see that in recent years, with the gradual decline in the price of products suitable for wireless LAN, the corresponding software has gradually matured. In addition, by combining with WAN, WLAN has been able to provide multimedia services for mobile Internet. With the popularity of open office and handheld devices, people's demand for mobile access and information storage is increasing, so WLAN will be widely used in office, production and home. 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