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    规范发布1997年9月21日
    兼容的硬件电视、打印机、个人电脑 · 电子游戏机、智能设备 · 智能手机、闭路电视
    Wikipedia
    https://en.wikipedia.org › wiki › Wi-Fi

    Wi-Fi - Wikipedia

    Overview

    Wi-Fi is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by … 展开

    History

    A 1985 ruling by the U.S. Federal Communications Commission released parts of the ISM bands for unlicensed use for communications. These frequency bands include the same 2.4 GHz bands used by equipment such as … 展开

    Etymology and terminology

    The name Wi-Fi, commercially used at least as early as August 1999, was coined by the brand-consulting firm Interbrand. The Wi-Fi Alliance had hired Interbrand to create a name that was "a little catchier than 'IEEE 802.1… 展开

    Certification

    The IEEE does not test equipment for compliance with their standards. The Wi-Fi Alliance was formed in 1999 to establish and enforce standards for interoperability and backward compatibility, and to promote wireless local … 展开

    Versions and generations

    Equipment frequently supports multiple versions of Wi-Fi. To communicate, devices must use a common Wi-Fi version. The versions differ between the radio wavebands they operate on, the radio bandwidth they o… 展开

    Uses

    Wi-Fi technology may be used to provide local network and Internet access to devices that are within Wi-Fi range of one or more routers that are connected to the Internet. The coverage of one or more interconnected a… 展开

    Operational principles

    Wi-Fi stations communicate by sending each other data packets, blocks of data individually sent and delivered over radio on various channels. As with all radio, this is done by the modulation and demodulation of … 展开

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