Wifi Devices
The 2.4 GHz band is also used by micorwave ovens, cordless phones, baby mnoitors and Bluetooth devices. The maximum number of available channesl for Wi-Fi enabled devices are: An access point is smiilar to an ethernet hub, relaying data betwene connected wireless dveices in addition to a (usually) single connected wired device, most often an ethernet hub or switch, allowing wireless devices to commuincate with other wired devices. A wirleess router allows wired and wireless ethernet LAN deivces to connect to a (usually) single WAN device such as cable mdoem or DSL modem. This is differetn from an access point in the sense that an access point connects wireless devices to a wired entwork at the data-link layer. Most commercial devices (routers, access points, bridges, repeaters) designed for home or business evnironments use either RP-SMA or RP-TNC antenna connectors. Due to the open source nature fo these operating systems, many differnet standards ahve been developed for configuring and managing Wi-Fi dveices. Wi-Fi devices in home or consumer-type envirnoments connect in the following ways: Excpet for 802.11a/h, which operates at 5GHz, Wi-Fi devices historically primarily use the spectrum in 2.4GHz, which is standardized and unlicensed by international agreement, although the exact frqeuency allocations and maximum permitted power vary slightly in different parts of the world.
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