Features and advantages of Wireless LAN

The wireless LAN uses electromagnetic waves to send and receive data in the air. This article gives a detailed introduction to the features and advantages of the wireless LAN.

1980s was the development and popularization of wired LAN. Although wired LAN can meet the requirements of General Industrial Automation and office automation environments, there are also many shortcomings in this network, such as: the transmission rate is still not high enough, the wiring is cumbersome, and the office cable is flooded; you cannot access the LAN from a mobile device. To overcome these problems, people began to find breakthroughs in improving transmission rates and supporting mobility to develop LAN models that adapt to the future. In terms of transmission rate, the LAN is evolving along Ethernet → FDDI → Fast Ethernet → atm lan. Another direction of LAN development is wireless LAN. In addition to maintaining the high speed of the existing LAN, the wireless LAN uses radio waves or infrared rays as the transmission media to flexibly form a removable LAN without wiring. With the advent of the information age, more and more people are demanding to be able to receive all kinds of information anytime and anywhere. Therefore, it is more urgent to access the LAN from mobile devices. Therefore, wireless LAN has broad development prospects.

Wireless LAN uses electromagnetic waves to send and receive data in the air, without the need for cable media. The data transmission rate of the wireless LAN has now reached 11 Mbit/s, and the transmission distance can be as far as 20km or more. It is a supplement and extension to the wired network mode, so that the computer on the Internet can be moved, and can quickly and conveniently solve the problem of network connectivity that is not easy to implement using the wired network. Compared with wired networks, wireless LAN has the following advantages:

-- Easy to install. Generally, in network construction, network cabling construction projects have the longest construction period and the greatest impact on the surrounding environment. During the construction process, it is often necessary to break through the wall and dig through the wire frame tube. The biggest advantage of a wireless LAN is to avoid or reduce the workload of network wiring. Generally, you only need to install one or more AP devices to establish a local network covering the entire building or area.

-- Flexible use. In a wired network, the placement of network devices is limited by the location of network information points. Once the wireless LAN is built, the network can be connected to any location in the signal coverage area of the wireless network.

-- Economic savings. Due to the lack of flexibility in wired networks, network planners are required to consider future development needs as much as possible, which often leads to a large number of Preset low-utilization information points. Once the development of the network exceeds the design plan, it will take a lot of money to perform network transformation, while the wireless LAN can avoid or reduce the occurrence of the above situation.

-- Easy to expand. A wireless LAN can be configured in multiple ways and can be flexibly selected as needed. In this way, the wireless LAN can be competent for a small LAN with only a few users to a large network with thousands of users, and can provide features that cannot be provided by wired networks such as "Roaming. Due to the advantages of Wireless LAN in many aspects, the development is very rapid. In recent years, wireless LAN has been widely used in hospitals, shops, factories and schools that are not suitable for network cabling.