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Wi-Fi คือ อะไร ?

wi-fi

Wi-Fi อ่านว่า วายฟาย ไม่ได้อ่านว่า ไวไฟ ไม่ได้เกี่ยวอะไรกับ วัตถุไวไฟ ที่เขียนไว้หลังรถขนน้ำมัน (เกี่ยวอะไรกันเนี่ย...)

Wi-Fi ย่อมาจาก Wireless fidelity เป็นอุปกรณ์ต่างๆ ที่สามารถใช้งานได้กับเครือข่ายคอมพิวเตอร์แบบไร้สาย (WLAN)
ซึ่งใช้มาตรฐาน IEEE 802.11 ปัจจุบันเป็นที่นิยมในการเชื่อมต่อระหว่างอินเตอร์เน็ท กับอุปกรณ์พกพาต่างๆ ไม่ว่าจะเป็น
iPhone, iPad, netbook, notebook ซึ่งเชื่อมต่อเข้าอินเตอร์เน็ทโดยผ่านอุปกรณ์ที่เรียกว่า access point กระจายคลื่น
โดยผ่านสายอากาศ ครอบคลุมพื้นที่ที่มีสัญญาณ เรียกว่า Hotspot

hotspot

เดิมได้มีการใช้คำว่า Wi-Fi แทนการเรียกเลข IEEE 802.11 ซึ่งเรียกง่าย คล้ายกับคำว่า Hi-Fi ที่ย่อจาก High fidelity

Wi-Fi เป็นเครื่องหมายการค้าของบริษัท Wi-Fi Alliance ซึ่งจะออกเอกสารและตรารับรอง ให้กับผลิตภัณฑ์ที่ผ่านการทดสอบ
ตามมาตรฐาน IEEE 802.11 ตัวอย่างเช่น ผลิตภัณฑ์วีดีโอเกม (nintendo Wii), เครื่องเล่น MP3, สมาร์ทโฟน, คอมพิวเตอร์,
กล้องถ่ายวีดีโอ

อุปกรณ์ที่เกี่ยวกับ Wi-Fi ไม่ได้มีเพียงเท่านี้เท่านั้น ในปัจจุบันยังมีการนำอุปกรณ์ Super Wi-Fi มาใช้ในการส่งผ่านสัญญาณ
ความเร็วสูง ในระยะไกล หรืออุปกรณ์บางตัวสามารถให้พื้นที่ในการให้บริการ (Hotspot) ได้ระยะหลายกิโลเมตรอีกด้วย แต่เท่านี้
ก่อนละกันครับ เอาเพียงคร่าวๆ เดี๋ยวยาว...
wi-fi zone

สำหรับผู้ที่ต้องการนำข่าวไปเผยแพร่บนเว็บไซต์ส่วนตัว หรือหน่วยงานของท่าน
  กรุณาก็อปปี้โค้ดข้างล่างนี้ เพื่ออ้างอิงแหล่งข่าวด้วยครับ ขอบคุณครับ:

สำหรับท่านไหนที่มี Facebook และนำข่าวสารไปแบ่งปันเพื่อนๆ เพียงกดปุ่มนี้ครับ