Difference Between WLAN and Wi-Fi
Nowadays, the network is spread all over the country. Turn on the wireless device and connect the computer, mobile phone, etc. In addition, at present, many smartphones, especially almost all Android phones, are equipped with the function of accessing wireless networks. However, with the gradual popularization of wireless networks, two new terms confuse us—what is the difference between WLAN and WIFI? , and what kind of connection? This problem is described in detail below.
1. Introduction to WLAN:
The full name of WLAN is: Wireless Local Area Networks, which is explained in Chinese as: wireless local area network, which is a system that uses radio frequency (Radio Frequency RF) technology for data transmission. It is used to make up for the deficiency of the wired local area network to achieve the purpose of network extension, so that the wireless local area network can use a simple access structure to allow users to realize a smooth network without network cables and without distance restrictions.
WLAN communication systems are typically used within the same building as an alternative to wired LAN. WLAN communicates using the ISM (Industrial, Scientific, Medical) radio band. The 802.11a standard for WLAN uses the 5 GHz band and supports speeds up to 54 Mbps, while the 802.11b and 802.11g standards use the 2.4 GHz band and supports speeds up to 11 Mbps and 54 Mbps, respectively.
At present, the protocol standards included in WLAN are: IEEE802.11b protocol, IEEE802.11a protocol, IEEE802.11g protocol, IEEE802.11E protocol, IEEE802.11i protocol, wireless application protocol (WAP).
2. Introduction to WIFI:
WIFI technology is a brand of wireless network communication technology based on IEEE 802.11 series standards. The purpose is to improve the interoperability between wireless network products based on IEEE 802.11 standards. Hold, simply speaking, WIFI is a wireless networking technology. It used to connect computers through the network, but now it connects to the Internet through radio waves. The Wi-Fi Alliance (also known as: WECA, the wireless LAN standardization organization) was established in 1999. The name at that time was Wireless Ethernet Compatibility Alliance (WECA). In October 2002, it was officially renamed as Wi-Fi Alliance.
Like Bluetooth technology, WIFI technology belongs to the short-range wireless technology used in offices and homes. The technology uses the frequency band near 2.4GHz, which is currently an unlicensed wireless frequency band. There are two currently available standards, namely IEEE802.11a and IEEE802.11b. Due to its own advantages, this technology is favored by manufacturers.
In layman’s terms, WIFI is essentially a commercial certification, and it is also a wireless networking technology. In the past, computers were connected through network cables, but now they are connected to the Internet through radio waves; the common one is a wireless router, so in this wireless The effective range covered by the radio wave of the router can be connected to the Internet by WIFI connection. If the wireless router is connected to an ADSL line or other Internet lines, it is also called a “hot spot”.
3. The difference between WLAN and WIFI:
After the above introduction to the two, in fact WIFI is a trademark of WLANA (Wireless Local Area Network Alliance). The 802.11b protocol is adopted, so people gradually get used to calling the 802.11b protocol with WIFI. In terms of inclusion, WIFI is included in WLAN and is a new technology that adopts the WLAN protocol.
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