Decoding the world of wireless technology "WIFI"

Wireless fidelity is a technology that can wirelessly connect terminals such as personal computers and handheld devices (such as PDAs and mobile phones). In fact, it is a high-frequency radio signal. Wireless Fidelity is a brand of wireless network communication technology, held by the Wi-Fi Alliance. The goal is to improve interoperability between wireless network products based on the IEEE 802.11 standard. At present, people generally confuse Wi-Fi with IEEE 802.11. Even equating Wi-Fi with the wireless internet.

The pronunciation of the abbreviation "Wi-Fi" is based on the pronunciation standard of the English standard Webster Dictionary. The standard pronunciation is /wai.fai/ because the word Wi-Fi is composed of two words, so the writing form is preferably WI-FI, so there is no such thing as the so-called audio problem by experts. Similarly, there is HI-FI (/wai.fai/).

In August 2014, cybersecurity researcher Ruben Santa Marta said that if the aircraft WiFi is too open, it could be used by hijackers.

On July 31, 2014, at the 12th China International Digital Interactive Entertainment Exhibition held in Shanghai, ChinaJoy, Tencent launched its new product “All People WiFi”.

Technical principle

Wireless networks in the category of wireless local area networks refer to "wireless compatibility certification".

It is essentially a commercial certification, and it is also a wireless networking technology. Previously, it was connected to a computer through a network cable, and wireless fidelity was connected by radio waves. The common one is a wireless router, then the radio wave coverage in this wireless router. The effective range can be connected by wireless fidelity connection. If the wireless router is connected to an ADSL line or other Internet access line, it is also called hotspot.

A wireless network is a technology that can wirelessly connect terminals such as personal computers and handheld devices (such as PDAs and mobile phones). Wi-Fi is a brand of wireless network communication technology and is owned by the Wi-Fi Alliance. The goal is to improve interoperability between wireless network products based on the IEEE 802.11 standard. Some people use the LAN that uses the IEEE 802.11 family of protocols as wireless fidelity. Even equating wireless fidelity with wireless internet (Wi-Fi is an important part of WLAN)

The main function

Wireless Internet access can be easily understood as wireless Internet access. Almost all smart phones, tablets and laptops support wireless fidelity, which is the most widely used wireless network transmission technology. In fact, it is to convert the wired network signal into a wireless signal, just as introduced at the beginning, using a wireless router to support related computers, mobile phones, tablets, etc. to support its technology. If the mobile phone has the wireless fidelity function, when there is a Wi-Fi wireless signal, it can not access the Internet through the mobile Unicom network, saving the traffic fee.

Wireless network wireless Internet access is more common in big cities. Although the wireless communication quality transmitted by wireless fidelity technology is not very good, the data security performance is worse than Bluetooth, and the transmission quality needs to be improved, but the transmission speed is very fast, which can reach 54Mbps. Personal and social informatization needs. The main advantage of wireless fidelity is that it does not require wiring and can be free from the restrictions of wiring conditions, so it is very suitable for the needs of mobile office users, and because the transmitted signal power is lower than 100mw, lower than the mobile phone transmit power, so wireless fidelity is relatively It is also the safest and healthiest.

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