WlanAdvantages
The wlan technology was first found in the united states and was used mainly for wireless extension of the last line, most notably in the home, where there is a strong demand for wireless access due to the difficulty of laying lines in the united states residential environment (separate villas, huts) and the high prevalence of equipment such as portables, pdas, etc., as well as economic development. This has led to the acceleration of wlan technology diffusion。
Wlan has the following advantages over cable access:
Wlan andWi-fiWhat's the difference
Wi-fi refers to the trademark of the wi-fi union and is based on the ieee 802. 11 standardWireless networkCommunication technology aimed at improving interoperability among wireless network products based on ieee 802. 11。
Wlan is fully known as wireless local area network, which in chinese means wireless lan. Wlan's definition is broad and narrow: in a broad sense, wlan replaces a network consisting of some or all of the transmission media in a network of radio waves (e. G. Lasers, infrareds, etc.) in place of radio channels; wlan's narrow definition is based on the ieee 802. 11 series of standards, using high frequency wireless frequency (e. G., 2. 4 ghz, 5 ghz or 6 ghz band radio magnetic waves) as a wireless area network for transmission media. Wlan in our daily lives is the narrow definition of wlan. In the evolution and development of wlan, many technical standards have been achieved, such as bluetooth, wi-fi, hyperlan2 and others. Wi-fi technology, on the other hand, has become the dominant wlan technical standard by virtue of its relatively simple, reliable communications, high flexibility and relatively low cost, and wi-fi technology has gradually become a proxy for wlan technical standards。
Simply put, wlan is a network system, and wi-fi is a technology in this network system. So the relationship between wlan and wi-fi is inclusive, and wlan includes wi-fi。
Is wlan safe
Wlan technologies have the advantages of ease of installation, flexibility of use, economy and ease of expansion. However, wlan technology is a transmission medium of operational data using wireless radio frequency signals, an open channel that makes it easy for the attackers to eavesdrop and tamper with operational data transmitted in wireless channels。
Wlan is commonSecurity threatsAs follows:
In response to these security threats, security precautions have been designed to protect client networks from attacks。
Wlan's rover
In the wlan network, wireless end-users have mobile communications capability. However, since the signal coverage of individual ap devices is limited, end users tend to move from one ap service area to another. In order to avoid a switch between mobile users and different aps, network communications were disrupted and the concept of wireless roaming was introduced。
Wireless roaming means that when the workstation sta (station) moves to the critical areas covered by the two aps, the sta is connected to the new aps and is disconnected from the original aps, while maintaining uninterrupted network connectivity in the process. In short, mobile telephones, like mobile phone functions, provide uninterrupted, seamless access when mobile phones move from one base station to another。
Common wlan roaming techniques include traditional roaming, rapid roaming, intelligent roaming and no-lost roaming。
Wlan's network type
In the business context, there are usually several types of wlan networks。
How does wlan work
In wlan, the information at the end of the launch site needs to be converted from a message source code to a digital signal that allows the circuit to be calculated and processed, and from a channel code to a radio wave launch. The receiving end receives radio waves, which are decoded, decoded and eventually converted to information. Information can be images, text, sound, etc. In which equipment is sent and equipment is received using interfaces and channel connections。
Wlan's working mechanism
