When we often use mobile phones to connect to WiFi, we find that the name of the mobile phone to connect to WiFi is not WiFi, but WLAN, and the function of our laptop to connect to WiFi is also WLAN. What is the difference and connection between the two?
Phone settings to connect to WiFi interface, the name is WLAN
1. Definition:
1. WLAN is the abbreviation of Wireless Local Area Network, wireless local area network; it refers to the application of wireless communication technology to interconnect computer equipment to form a network system that can communicate with each other and realize resource sharing. The essential feature of a wireless local area network is that it no longer uses a communication cable to connect the computer to the network, but uses wireless means such as radio waves or electric and magnetic fields as the medium for data transmission, so that the construction of the network and the movement of the terminal are more flexible.
2. WI-FI is the abbreviation of wireless fidelity, also known as "wireless hotspot" or "wireless network". It is a trademark of the Wi-Fi Alliance, a wireless LAN technology based on the IEEE 802.11 standard. "Wi-Fi" is often written as "WiFi" or "Wifi", but these wordings are not recognized by the Wi-Fi Alliance.
3. Another word WAPI needs to be mentioned here; WAPI (Wireless LAN Authentication and Privacy Infrastructure) is a wireless LAN authentication and privacy infrastructure, a security protocol, and a mandatory standard for China's wireless LAN security;
2. The relationship between WLAN and WiFi
1. The difference between WI-FI and IEEE 802.11
Wi-Fi and IEEE 802.11 are often confused. The difference between the two can be summarized as IEEE 802.11 is a wireless local area network standard, and Wi-Fi is an IEEE 802.11 standard An implementation of. Several physical layer (PHY) specifications have been formulated in the IEEE 802.11 standard. In addition to Wi-Fi, product implementations include WiGig. After the WiGig Alliance merged into the Wi-Fi Alliance, it was defined as an extension of Wi-Fi and launched Wi-Fi CERTIFIED. WiGig certification project. Outside these two types of ranges, there are two distinct physical layer specifications, TVHT PHY and S1G PHY, which work in the frequency band below 1 GHz. People habitually use "WiFi" to refer to the 802.11 protocol.
2. The difference and connection between
WIFI and WLAN① The relationship between WIFI and WLAN: From the point of view of definition, WLAN is the general term for wireless local area networks. Currently, there are only two standards in the field of wireless local area networks in the world. They are IEEE proposed by the American Industry Standards Organization. 802.11 series standards (including 802.11a/b/g/n/ac, etc.), as well as the WAPI standard proposed by China; that is, WLAN includes WiFi (WiFi replaces IEE 802.11); the relationship between the two can be summarized simply and clearly with the following figure
②, the difference between WIFI and WLAN: the coverage of WiFi can reach about 300 feet (about 90 meters), and the maximum WLAN (with antenna) can reach 5KM. WLAN is suitable for a wider range, while WIFI is suitable for a small area;
PS: In 2003, my country began to plan to implement the WAPI standard with higher security performance, but it was opposed by Intel and other American companies, and it has still not been able to be promoted globally; however, my country stipulates that it is available on all mobile phones of the National Bank. Must support both Wi-Fi and WAPI technologies to access the WLAN network, and mobile phones that only support Wi-Fi networks cannot be listed. So our domestic mobile phones display WLAN; on the contrary, if your mobile phone displays WiFi, then it is a non-national version of "parallel imports."
Above, if there is an error, please point it out, thank you!