Is WLAN the same as Wi-Fi
About WLAN and Wi-Fi
WLAN is the abbreviation of "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.
Wi-Fi is the abbreviation of "wireless fidelity", also known as "wireless hotspot" or "wireless network", and is a trademark of the Wi-Fi Alliance. It is 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.
The connections between WLAN and Wi-Fi
The communication range of WLAN is not restricted by the environment. In any place covered by the wireless signal, the user can connect to the network by moving the computer arbitrarily. The WLAN network is more flexible, simple to install, low in deployment cost, and better in expansion. It can be used in environments that are difficult to wire. Wi-Fi is a wireless network composed of wireless access nodes and wireless network cards. The wireless access node is the bridge between the traditional wired local area network and the wireless local area network. The wireless network card is a device used to receive the signal transmitted by the wireless access node. In short, Wi-Fi technology is a short-range wireless technology. Wi-Fi, like WLAN, is also a wireless networking technology, which changes from a network cable to a radio wave to connect to the network. The common way is to use a Wi-Fi connection for networking within the effective coverage of a wireless router.
From a global perspective, WLAN includes two protocol standards: one is the IEEE 802.11 series standards (including 802.11a/b/g/n/ac, etc.) proposed by the American Industry Standards Organization, and the other is the WAPI standard proposed by China. WAPI is short for Wireless LAN Authentication and Privacy Infrastructure. It is a wireless LAN authentication and confidentiality infrastructure, a security protocol, and a mandatory standard for China's wireless LAN security.
IEEE 802.11 is a wireless local area network standard, and Wi-Fi is one of the implementation forms of the IEEE 802.11 standard. This also means that there are other implementations of the IEEE 802.11 standard, such as WiGig.
In terms of inclusion relationship, Wi-Fi is a standard of WLAN, and Wi-Fi is included in WLAN, which is a new technology that adopts WLAN protocol.
The differences between WLAN and Wi-Fi
1. The power of the transmitted signal is different.
WLAN works in 4 independent frequency bands divided by the IEEE 802.11 working group: 2.4 GHz, 3.6 GHz, 4.9 GHz, and 5.8 GHz. It is a local area network formed by wireless means. WLAN communication system is generally used in the same building as an alternative to wired LAN. Wi-Fi technology is a brand of wireless network communication technology based on the IEEE 802.11 series of standards. The purpose is to improve the interoperability between wireless network products based on the IEEE 802.11 standard. This technology uses a frequency band near 2.4GHz, which is currently an unlicensed wireless frequency band.
2. The wireless signal coverage is different.
The biggest difference between WLAN and Wi-Fi is network coverage. Because the WLAN network is more flexible, simple to install, low in deployment cost, and better in expansion capabilities, the transmission range of the WLAN network is very wide. The coverage of Wi-Fi can reach about 300 feet, and the maximum of WLAN can reach 5KM. Of course, an antenna needs to be added to reach this range.
Although many people confuse Wi-Fi with WLAN, in fact, Wi-Fi is only a part of WLAN technology. In layman's terms, Wi-Fi is actually one of WLAN wireless network technologies. To put it simply, "WLAN is a larger WIFI with a coverage radius of 2-3 kilometers. Wi-Fi is a smaller WLAN with a coverage range of 20-30 meters."