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An 802.11n-only network may be impractical for many users because they need to support legacy equipment that still is 802.11b/g only. In a mixed-mode system, an optimal solution would be to use a dual-radio access point and place the 802.11b/g traffic on the 2.4 GHz radio and the 802.11n traffic on the 5 GHz radio. [20]
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.
802.11 networks in infrastructure mode are half-duplex; all stations share the medium. In infrastructure or access point mode, all traffic has to pass through an Access Point (AP). Thus, two stations on the same access point that are communicating with each other must have each and every frame transmitted twice: from the sender to the access ...
Better or worse performance with higher or lower frequencies (channels) may be realized, depending on the environment. 802.11n and 802.11ax can use either the 2.4 GHz or 5 GHz band; 802.11ac uses only the 5 GHz band. The segment of the radio frequency spectrum used by 802.11 varies between countries. In the US, 802.11a and 802.11g devices may ...
There are wireless range extending devices that conform to all 802.11 protocols. Most 802.11 compliant devices are backward compatible. However, 802.11ac runs at 5 GHz and requires an access point capable of 5 GHz operation. 802.11ac equipment is backward compatible with 802.11n, 802.11g, or 802.11b equipment.
Nodes typically connect in a star or mesh topology. While most individual nodes in a WSAN are expected to have limited range ( Bluetooth , Zigbee, 6LoWPAN , etc.), particular nodes may be capable of more expansive communications ( Wi-Fi , Cellular networks , etc.) and any individual WSAN can span a wide geographical range.
A wireless network interface device with a USB interface and internal antenna A Bluetooth interface card. A wireless network interface controller (WNIC) is a network interface controller which connects to a wireless network, such as Wi-Fi, Bluetooth, or LTE (4G) or 5G rather than a wired network, such as an Ethernet network.
Core MAC/PHY interoperability over 802.11a, 802.11b, 802.11g, and 802.11n (at least one). Wi-Fi Protected Access 2 (WPA2) security, [9] which aligns with IEEE 802.11i. WPA2 is available in two types: WPA2-Personal for consumer use, and WPA2 Enterprise, which adds EAP authentication. Optional: Tests corresponding to IEEE 802.11h and 802.11d.
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