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WiFi is the nickname for Wireless Fidelity - high speed internet and network connection without the use of wires, cables and other stuff you can trip over.
Often, instead of referring to just wireless for these technologies, the term âWi-Fi will be used (a term that is trademarked by the Wi-Fi Alliance). Wi-Fi covers technologies that incorporate 802.11 standards, such as 802.11g or 802.11ac network cards and wireless routers.