The difference between WiFi and Wi-Fi

A lot of people go to a place where the choice is to find a wireless network, and sometimes ask people around: is there Wi-Fi? Or is there a WLAN? What's the difference between WiFi and Wi-Fi?

In short, WIFI is the acronym for Wireless Fidelity (wireless fidelity), a technology that connects computers, mobile phones, and so on wirelessly.

WLAN refers to Wireless LAN, its coverage can reach 5 kilometers. WiFi is a subset of WLAN, WiFi is a short-distance wireless communication technology, and WLAN can build a powerful carrier-class internetwork, layout multiple APS (hotspots), such as Campus Wireless LAN.

What's the difference between WiFi and Wi-Fi?

In fact, WiFi is a trademark of Wlana (Wireless LAN Alliance), which only guarantees the use of the trademark of the goods can be co-operation with each other, and the standard itself is not actually related, but because WiFi mainly uses 802.11B protocol, So people are getting used to using WiFi to address the 802.11B protocol. From the inclusion relationship, WiFi is a standard of WLAN, WiFi is included in the WLAN, is a new technology in the adoption of WLAN protocol. WiFi coverage can reach about 300 feet (90 meters), the maximum WLAN (plus antenna) can be up to 5KM.

In addition, the biggest advantage of WiFi is high transmission speed, can reach 11Mbps, in addition to its effective distance is also very long, but also with a variety of 802.11DSSS devices are compatible. We know that Bluetooth technology has a very small range of radio waves, a radius of about 50 feet or so about 15 meters, while the radius of WiFi can reach about 300 feet about 90 meters, in the home or office without saying, with the development of WiFi technology, some WiFi can cover the entire building.

From the actual example of life can also be seen, WiFi wireless network is mainly by routers or wireless network card, wireless AP generation, transmission speed is very limited, it is generally only household or general small and medium-sized enterprises to adopt.

And Wi-Fi network in many campuses, such as China Mobile and telecommunications are in some areas have WLAN network, its biggest highlight is a WLAN network signal can cover the entire campus, this is what we can feel the difference.

The difference between WiFi and Wi-Fi