Name: 一次搞懂所有 Wi-Fi 世代！6 分鐘帶你看懂網速進化史！ (Every Wi-Fi Generation Explained in 6 Minutes)
Uploaded: 2025-10-31T21:01:30.000Z
Duration: 6 min 1 s

Wi fi 0.802.11 the first version of wi fi appeared in 1997 under the IEEE 802.11 standard.

Wi-Fi 0，也就是 Wi-Fi 的第一個版本，於 1997 年在 IEEE 802.11 標準下問世。

It operated on the 2.4 GHz band and supported speeds of up to 2 Mbps.

它運行在 2.4 GHz 頻段，最高支援 2 Mbps 的速度。

At that time, it was mainly used for basic wireless data exchange between computers without cables.

那時候，它主要用於電腦之間基本的無線數據交換，不需要連接線。

The speed and range were extremely limited, so it wasn't ideal for streaming or large file transfers.

它的速度和範圍都非常有限，所以不太適合串流或大型檔案傳輸。

Still, Wi Fi0 laid the foundation for modern wireless commun showing that data could travel through the air, a concept that would evolve rapidly in the years to come.

不過，Wi-Fi 0 為現代無線通訊打下了基礎，證明瞭數據可以透過空氣傳輸，這個概念在接下來的幾年裡迅速發展。

Wi Fi 1 802.11B Wi Fi 1 was released in 1999 as the first widely adopted wireless networking standard.

Wi-Fi 1，也就是 802.11B，於 1999 年推出，是第一個被廣泛採用的無線網路標準。

It continued using the 2.4 GHz band but improved speeds up to 11 Mbps.

它繼續使用 2.4 GHz 頻段，但速度提升至 11 Mbps。

This made wireless connectivity practical for homes, schools, and small offices.

這使得無線連接在家裡、學校和小型辦公室都變得實用。

However, because it shared the same frequency range as Bluetooth devices and microwave ovens, interference was a common problem.

不過，由於它與 Bluetooth 裝置和微波爐共用相同的頻率範圍，訊號幹擾是個常見的問題。

Despite its limitations, WI Fi one introduced the world to accessible and affordable wireless Internet, changing how people connected laptops, printers, and

儘管有其限制，Wi-Fi 1 讓全世界體驗到可及且經濟實惠的無線網路，改變了人們連接筆記型電腦、印表機和

routers within a few meters of each other.

Wi Fi 2 802.11A Launched the same year as Wi Fi 1, Wi Fi 2 brought a new approach.

Wi-Fi 2 (802.11A) 與 Wi-Fi 1 同年推出，Wi-Fi 2 帶來了新的方法。

It used the 5 GHz band instead of 2.4 GHz, which provided faster data rates up to 54 Mbps.

它使用了 5 GHz 頻段而非 2.4 GHz，提供了高達 54 Mbps 的更快數據傳輸速率。

The higher frequency reduced interference and made connections more stable, especially in busy environments.

較高的頻率減少了訊號幹擾，並使連線更穩定，尤其是在繁忙的環境中。

But the trade off was shorter range, since 5 GHz signals struggled to pass through walls and solid objects.

但代價是較短的範圍，因為 5 GHz 訊號難以穿透牆壁和實體物體。

Because of this, Wi Fi 2 was mainly used in offices and enterprise networks rather than homes, where coverage and range were more important than raw speed.

是以，Wi-Fi 2 主要用於辦公室和企業網路，而不是家庭，因為在家裡，覆蓋範圍和距離比原始速度更重要。

Wi Fi 3.802.11G introduced in 2003, Wi Fi 3 combined the strengths of earlier standards.

Wi-Fi 3 (802.11G) 於 2003 年推出，Wi-Fi 3 結合了早期標準的優點。

It returned to the 2.4 GHz band but achieved the same 54 megabit speed as Wi Fi 2.

它回到了 2.4 GHz 頻段，但達到了與 Wi-Fi 2 相同的 54 Mbps 速度。

This generation became extreme popular because it offered faster wireless performance while staying compatible with older Wi Fi 1 devices.

這一代變得非常受歡迎，因為它在與舊款 Wi-Fi 1 裝置保持相容的同時，提供了更快的無線效能。

It was reliable, affordable, and perfect for home and small business Networks.

它可靠、經濟實惠，非常適閤家庭和小企業網路。

By the mid-2000s, Wi Fi 3 routers were common everywhere, enabling smoother Web browsing, faster downloads, and

到了 2000 年中期，Wi-Fi 3 路由器隨處可見，讓網頁瀏覽、下載和

easier file sharing between PCs, printers, and early smartphones connected to the same network.

檔案分享在連接到同一網路的電腦、印表機和早期智慧型手機之間變得更順暢。

Wi Fi 4 Wi Fi 4, released in 2009, marked a major breakthrough in wireless technology.

Wi-Fi 4 Wi-Fi 4 於 2009 年推出，標誌著無線技術的一大突破。

It introduced dual band support, meaning it could use both 2.4 and 5 gigahertz frequencies simultaneously.

它引入了雙頻支援，這意味著它可以同時使用 2.4 和 5 吉赫茲的頻率。

Speeds jumped dramatically reaching up to 600 Mbps.

速度大幅躍升，最高可達 600 Mbps。

It also brought in MIMO multiple input, multiple output, allowing several antennas to send and receive data at the same time.

它還引入了 MIMO 多輸入、多輸出技術，讓多個天線可以同時傳送和接收資料。

This improved range, reduced interference and made streaming HD videos or gaming online far more reliable.

這改善了訊號範圍，減少了訊號幹擾，讓串流高清影片或線上遊戲更加可靠。

Wi Fi 4 became the backbone of modern wireless routers and devices for nearly a decade.

Wi-Fi 4 成為了近十年來現代無線路由器和裝置的骨幹。

Wi Fi 5 802.11ac Released in 2013, Wi Fi 5 focused entirely on the 5 GHz band to maximize speed and stability.

Wi-Fi 5 802.11ac Wi-Fi 5 於 2013 年推出，完全專注於 5 GHz 頻段，以最大化速度和穩定性。

It could reach theoretical speeds up to 6.9 gigabits per second, a massive leap from earlier versions.

它的理論速度最高可達每秒 6.9 吉比特，與早期版本相比有了巨大的飛躍。

This generation introduced Mu MIMO or multi User Mimo, which allowed several devices to share bandwidth without slowing each other down.

這代引入了 MU-MIMO（多使用者 MIMO）技術，讓多個裝置能共享頻寬，彼此不會互相拖慢速度。

And it was optimized for streaming, online gaming and large data transfers, making it ideal for smart homes and offices.

它針對串流、線上遊戲和大型檔案傳輸進行了優化，非常適合智慧家庭和辦公室。

Most modern routers, laptops and smartphones launched between 2015 and 2020 were built around Wi Fi 5.

2015 年到 2020 年間推出的絕大多數現代路由器、筆記型電腦和智慧型手機都是基於 Wi-Fi 5 建置的。

Wi Fi 6 802.11ax Wi Fi 6, introduced in 2020, improved how networks handle multiple devices.

Wi-Fi 6 802.11ax Wi-Fi 6 於 2020 年推出，改進了網路處理多個裝置的方式。

It used both 2.4 and 5 GHz bands and introduced OFDMA, which divides channels into smaller sub channels to many users efficiently.

它同時使用了 2.4 GHz 和 5 GHz 頻段，並引入了 OFDMA 技術，將頻道分割成更小的子頻道，能有效率地服務許多使用者。

It also reduced latency and added target wake time, a feature that helps devices save battery by scheduling when to connect with speeds up to 9.6 gigabits per second.

它還降低了延遲，並加入了目標喚醒時間（Target Wake Time）功能，透過排程連線時間來幫助裝置節省電力，速度最高可達每秒 9.6 吉比特。

Wi Fi 6 offered stronger performance in crowded areas like offices, airports and apartments where dozens of devices compete for bandwidth simultaneously.

Wi-Fi 6 在辦公室、機場和公寓等擁擠的區域提供了更強的效能，這些地方有數十個裝置同時競爭頻寬。

Wi Fi 6e Wi Fi 6e arrived in 2021 as an extension of Wi Fi 6, bringing access to a brand new 6 GHz frequency band.

Wi-Fi 6E Wi-Fi 6E 於 2021 年問世，作為 Wi-Fi 6 的延伸，帶來了全新的 6 GHz 頻段的存取。

This additional spectrum provided more bandwidth and less interference compared to the already crowded 2.4 and 5 GHz bands.

這個額外的頻譜提供了更大的頻寬，並且與已經擁擠的 2.4 GHz 和 5 GHz 頻段相比，訊號幹擾更少。

Wi Fi 6e routers offered faster, more stable connections and were designed for high density spaces such as large offices, stadiums and public networks.

Wi-Fi 6E 路由器提供了更快、更穩定的連線，專為大型辦公室、體育館和公共網路等高密度空間設計。

It helped reduce congestion and latency, improving real time performance for activities like 4K streaming, VR, gaming and video conferencing in busy environments.

它有助於減少壅塞和延遲，在擁擠的環境中，能提升 4K 串流、VR、遊戲和視訊會議等活動的即時效能。

Wi Fi 7 802.11 be Wi Fi 7 represents the next generation of wireless networking.

Wi-Fi 7 802.11be Wi-Fi 7 代表了下一代的無線網路。

它建立在 Wi-Fi 6E 的基礎之上，但

adds cutting edge features like 4K QAM, which increases data capacity and multi link operation, allowing devices to connect across multiple frequency bands simultaneously.

加入了 4K QAM 等尖端功能，可增加數據容量，以及多連結操作，讓裝置能同時跨多個頻段連線。

This boosts both speed and reliability with projected Data rates exceeding 46 gigabits per second.

這將預計超過每秒 46 吉比特的數據傳輸速率，同時提升速度和可靠性。

Wi Fi 7 will enable Ultra high definition streaming, cloud gaming, real time, virtual reality and smart homes running dozens of connected devices without slowdown.

Wi-Fi 7 將能夠實現超高畫質串流、雲端遊戲、即時虛擬實境，以及數十個連網裝置同時運作的智慧家庭，而不會出現延遲。

My goal here is to help you understand how each WI fi generation works.

我的目標是幫助你瞭解每一代 Wi-Fi 的運作方式。

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