【 Weak current College 】 802.11 context

June 12, 2003, IEEE802.11g official as technical standards publication, one month later, Wi-Fi Alliance certification for the first use of standard products. 802.11g IEEE802.11g can be viewed as IEEE802.11b, high-speed version, but in order to achieve 54Mbit/s of transfer rate, 11g adopted and 11b different OFDM (orthogonal frequency division multiplexing) modulation, it supports 54Mbps transfer rate.
IEEE802.11 standard was introduced in 1997, on this basis, in September 1999, the proposed standard and IEEE802.11b standard IEEE802.11a.
Boost wireless LAN standardization organization WECA (TheWirelessEthernetCompatibilityAlliance, also known as "Wi-Fi Alliance") was announced in November 2001, will follow the "IEEE802.11a" product identification tag to "Wi-Fi5" (this is because IEEE802.11a utilizes 5GHz band); WECA organizations previously will use 2.4GHz band wireless LAN IEEE802.11b "known as" "Wi-Fi".

Along with many other manufacturers a comprehensive intervention now 802.11 series wireless network product prices have reduced a lot. The newly launched TP-Link network card plus AP entry-type wireless network package, the price is less than $ 1000. The market and some integration of routers, switches, and other features of multifunctional ADSLModem AP sales for home users and SOHO family, this product has greatly reduced the CTO, is very attractive. From the compatibility and interoperability to consider the purchase of WLAN equipment, it is important to note that view ID, check whether the adoption of Wi-Fi certified integrated wireless network function notebook is no exception. Visit the official website of the WECA http//www.weca.net, online queries through the "Wi-Fi" certification of wireless networking products.
Currently on WLAN support best stand-alone operating system is WindowsXP, it will control on a wireless network interface integrated in a unified "wireless link" function, in the "Control Panel" to find it. For notebook users, do not use a wireless network, recommendations will be integrated wireless adapter off or external wireless network card removal; because the wireless adapter will continue to detect the surroundings have a wireless connection and the connection attempt, not only electricity, consume system resources, but also is a security risk.

In the midst of cheers, wireless network attracts everyone's attention, however our wireless network soft ribs should have an understanding. As a historical and a long history of technology, the wireless network has a variety of defects is inevitable and this is also the direction of its future efforts.
Bluetooth transmission distance less than is its Achilles heel. From a cost analysis, Bluetooth may not, however various patent fees and market speculation that Bluetooth got lost. A few years ago, it is Bluetooth universal opportunity, unfortunately we see various Bluetooth product price. Although today's Bluetooth is already down the altars, but in the transmission distance of more powerful Wi-Fi was established the advantages for Bluetooth in the competition very passive, basically giving up wireless LAN market, focused on bandwidth and transmission distance requirements lower mobile devices. In addition, the transmission distance of more recent infrared technology continues to develop, as a practical, low-cost solution.
Of course, Wi-Fi also is not perfect, security issues are bearing the brunt. In the commercial market, Wi-Fi eager to show in the wireless LAN, which had security problems on the breakthrough. Although in developing initial Wi-Fi will security problems in a certain height, but at least so far, many users still cannot be assured, especially those in low-priced universal product. In addition, the power consumption issues is by Wi-Fi must face, and this is its most than Bluetooth, lead in mobile device competition faced unfavorable situation.