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Wi-Fi provides services in private homes, businesses, as well as in public spaces. Wi-Fi hotspots may be set up either free of charge or commercially, often using a captive portal webpage for access.
The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
Wi-Fi 6, or IEEE 802.11ax, is an IEEE standard from the Wi-Fi Alliance, for wireless networks ( WLANs ). It operates in the 2.4 GHz and 5 GHz bands, [9] with an extended version, Wi-Fi 6E, that adds the 6 GHz band. [10] It is an upgrade from Wi-Fi 5 ( 802.11ac ), with improvements for better performance in crowded places.
Help protect your online privacy with Private WiFi. Encrypts and anonymizes internet browsing on up to 3 devices. Try it free* now!
The Affordable Connectivity Program ( ACP) is a United States government-sponsored program that aims to provide internet access to low-income households. [1] Several companies have signed on to participate in the program, including Verizon Communications, Frontier Communications, T-Mobile, Spectrum, Cox, AT&T, Xfinity, Optimum and Comcast.
Comparison of open-source wireless drivers. Wireless network cards for computers require control software to make them function ( firmware, device drivers ). This is a list of the status of some open-source drivers for 802.11 wireless network cards.
Free hotspots Public Wi-Fi hotspot in Zürich. According to statista.com, in the year 2022, there are approximately 550 million free Wi-Fi hotspots around the world. The U.S. NSA warns against connecting to free public Wi-Fi. Free hotspots operate in two ways: Using an open public network is the easiest way to create a free hotspot.
As of 2009, LDPC codes are also part of the Wi-Fi 802.11 standard as an optional part of 802.11n and 802.11ac, in the High Throughput (HT) PHY specification. LDPC is a mandatory part of 802.11ax (Wi-Fi 6).
Wi-Fi Protected Access (WPA), Wi-Fi Protected Access 2 (WPA2), and Wi-Fi Protected Access 3 (WPA3) are the three security certification programs developed after 2000 by the Wi-Fi Alliance to secure wireless computer networks.
Code-division multiple access ( CDMA) is a channel access method used by various radio communication technologies. CDMA is an example of multiple access, where several transmitters can send information simultaneously over a single communication channel. This allows several users to share a band of frequencies (see bandwidth ).