Wi-Fi technology is now widely used in homes and offices. The origin of Wi-Fi naming: Wi-Fi is an acronym for wirelesssFidelity. Now, Wi-Fi is often synonymous with wireless local area networks (WLANs). It is often mentioned simultaneously with WiMaX.
The history of Wi-Fi begins with an organization called the "Wireless Ethernet Compatibility Alliance." The mission of this organization is to certify the interoperability of wireless local area network (WLAN) devices produced by different vendors. The organization has now been renamed the "Wi-Fi Alliance," and its certification is based on the 802.11b standard adopted by the Institute of Electrical and Electronics Engineering (IEEE). After the Wi-Fi Alliance certification mark, the "Wi-Fi" logo is affixed to the product and a "Wi-Fi" certificate is issued.
The initial purpose of the WLAN is to introduce the concept of wireless in the traditional LAN, so that users in the LAN can get rid of the constraints of the cable and have certain mobility. WLAN uses high-frequency bands, and its transmission power is weaker than that of ordinary mobile phones. Therefore, it does not harm the human body and usually does not interfere with home or office appliances. Moreover, there are 12 channels left for adjustment.
WLAN not only enables people to enjoy the fun of wireless Internet access, but also the corporate office environment is more tidy, and no complicated cabling is required in the building. It is only necessary to deploy access points (AP, AccessPoint) at any terminal location on the LAN--in fact, it is commonly used by us. The wireless router, a computer with a Wi-Fi terminal installed, can access the LAN.
The 802.11b standard also uses “dynamic rate drift†that can change with the environment. The rate can be switched between 11 Mbit/s, 5 Mbit/s, 2 Mbit/s, and 1 Mbit/s. In recent years, the development of Wi-Fi has been extremely rapid, and there have been many variants and upgrades, such as 802.11a and 802.11g. The rate can be as high as 54 Mbit/s, and the technology base is also changed from DSSS to OFDM. What is expected is that the next-generation Wi-Fi standard 802.11n adopts multiple input and output (MIMO) technology, which has already mentioned its rate to 540 Mbit/s!
The history of Wi-Fi begins with an organization called the "Wireless Ethernet Compatibility Alliance." The mission of this organization is to certify the interoperability of wireless local area network (WLAN) devices produced by different vendors. The organization has now been renamed the "Wi-Fi Alliance," and its certification is based on the 802.11b standard adopted by the Institute of Electrical and Electronics Engineering (IEEE). After the Wi-Fi Alliance certification mark, the "Wi-Fi" logo is affixed to the product and a "Wi-Fi" certificate is issued.
The initial purpose of the WLAN is to introduce the concept of wireless in the traditional LAN, so that users in the LAN can get rid of the constraints of the cable and have certain mobility. WLAN uses high-frequency bands, and its transmission power is weaker than that of ordinary mobile phones. Therefore, it does not harm the human body and usually does not interfere with home or office appliances. Moreover, there are 12 channels left for adjustment.
WLAN not only enables people to enjoy the fun of wireless Internet access, but also the corporate office environment is more tidy, and no complicated cabling is required in the building. It is only necessary to deploy access points (AP, AccessPoint) at any terminal location on the LAN--in fact, it is commonly used by us. The wireless router, a computer with a Wi-Fi terminal installed, can access the LAN.
The 802.11b standard also uses “dynamic rate drift†that can change with the environment. The rate can be switched between 11 Mbit/s, 5 Mbit/s, 2 Mbit/s, and 1 Mbit/s. In recent years, the development of Wi-Fi has been extremely rapid, and there have been many variants and upgrades, such as 802.11a and 802.11g. The rate can be as high as 54 Mbit/s, and the technology base is also changed from DSSS to OFDM. What is expected is that the next-generation Wi-Fi standard 802.11n adopts multiple input and output (MIMO) technology, which has already mentioned its rate to 540 Mbit/s!
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