Mobile Internet (2)

A wireless LAN can be implemented through wireless hub, wireless access station (AP), Wireless Bridge, wireless modem, and wireless network card on the basis of a common LAN. Among them, wireless network cards are the most common and most commonly used. The key technologies of Wireless LAN include infrared transmission, spread spectrum, and network synchronization: modulation Technology, disturbing technology, wireless diversity receiving technology, power control technology and energy-saving technology.

Network security is very important for wireless LAN. Network security refers to preventing the loss, destruction, and improper use of information and resources. Both wired and wireless networks must prevent physical damage, eavesdropping, illegal access, and various internal (legal user) attacks. The area covered by wireless network data transmission may be beyond the physical control of an organization, so that there is a possibility of electronic damage (or interference. Wireless Networks have various internal security mechanisms, and their code cleaning and pattern jumping are random. Throughout the transmission process, frequency bands and modulation are constantly changing, and irregular timing and decoding technologies are used. The alternative encryption algorithm and IEEE 802.11 require that wireless networks be at least as secure as wired networks (without encryption technology. Authentication provides access control to reduce illegal use of the network, and encryption can reduce damage and eavesdropping.

In fact, no matter what type of enterprise, wireless LAN can provide air connectivity for its enterprise intranet and Internet-various temporary offices, meeting rooms, classrooms, etc.-without affecting performance. All of these features can be achieved without complex cabling, while still maintaining overall security. You can enjoy the freedom and flexibility of working anywhere, such as in conference rooms, medical rooms, classrooms, self-help restaurants, laboratories, offices, and picnic tables in the wild. The popularity of Wireless LAN in various scales and types of enterprises is obvious, especially in the health care, finance, retail, manufacturing and education industries, and benefiting from productivity growth. This is due to various handheld terminals and laptops that can transmit real-time information. In other industries, wireless LAN is increasingly seen as an innovative and affordable tool to supplement wired networks rather than replace it.

In short, using a wireless LAN, users can access various information about e-mail, Internet, and company computing resources anytime, anywhere, without looking for access locations. Wireless connectivity is often a watershed in competition, separating one enterprise from another. From the IT point of view, wireless networks also bring great value because they do not need to install expensive Optical Fiber Infrastructure, at the same time, it can also provide network access for historic buildings that cannot lay cables.