Name: WIFI 到底是怎麼運作的，一起來看！ (How WIFI Actually Works.)
Uploaded: 2025-03-31T21:01:30.000Z
Duration: 2 min 22 s

情態副詞

Wi-Fi, aka IEEE 802.11, is arguably humanity's greatest invention.

Wi-Fi 又名 IEEE 802.11，可以說是人類最偉大的發明。

It's wild how we went from cables and dial-up modems to straight up an invisible network.

從電纜和撥號調制解調器到直接的無形網絡，這真是不可思議。

That with one click, you can doom scroll TikTok for hours.

只需點擊一下，您就可以在 TikTok 上滾動幾個小時。

Unlike visible light, which is stunted, radio waves are long and invisible.

無線電波與滯後的可見光不同，它既長又看不見。

This means they can pass through walls with ease, making them perfect for connecting devices wirelessly.

這意味著它們可以輕鬆穿牆，是無線連接設備的完美選擇。

How does light make it possible to play Fortnite all day?

光是如何讓人可以整天玩《堡壘之夜》的？

Let's start with how your router and phone pair.

我們先來看看路由器和手機是如何配對的。

When you switch on Wi-Fi, your phone searches for nearby networks.

打開 Wi-Fi 時，手機會搜索附近的網絡。

The list of networks you see is their SSIDs.

你看到的網絡列表就是它們的 SSID。

Which is just a fancy way of saying network names.

這只是網絡名稱的一種花哨說法。

You find Wi-Fi network named Hotbunny_39 and decide to connect.

您找到名為 Hotbunny_39 的 Wi-Fi 網絡並決定連接。

When you connect, the router assigns your phone an IP address.

連接時，路由器會為手機分配一個 IP 地址。

Think of this as your phone's special name in the network, so the router knows where to send and receive data.

將其視為手機在網絡中的特殊名稱，這樣路由器就能知道在哪裡發送和接收數據。

This is important because there might be multiple devices connected.

這一點很重要，因為可能連接了多個設備。

Now you've connected, let's say you want to watch this video on YouTube.

現在您已連接，假設您想在 YouTube 上觀看這段視頻。

Your phone sends a request for the video, and that request is broken into small pieces called data packets.

您的手機會發送視頻請求，該請求會被分割成小塊，稱為數據包。

These packets are already in binary, ones and zeros.

這些數據包已經是二進制，即 1 和 0。

Your phone puts this binary data into radio waves by changing its length and how squiggly the wave is.

手機通過改變波長和波形的斜度，將二進制數據轉化為無線電波。

It sends the signal to your router using a frequency band, like 2.4 GHz.

它使用某個頻段（如 2.4 GHz）向路由器發送信號。

This 2.4 GHz band is divided into channels to ensure that your bro Wi-Fi next door doesn't interfere with yours.

這個 2.4 GHz 頻段被劃分為多個信道，以確保隔壁兄弟的 Wi-Fi 不會干擾你的 Wi-Fi 網絡。

Only one device can send data on a channel at a time.

一個通道上一次只能有一個設備發送數據。

是以，其他設備必須等待時機。

那麼，您的路由器究竟是做什麼的呢？

Once it receives your data packets, it forwards your request to your internet service provider, like Comcast or MTN.

收到數據包後，它會將您的請求轉發給互聯網服務提供商，如 Comcast 或 MTN。

Your ISP connects to YouTube servers to request the video.

您的 ISP 連接到 YouTube 服務器以請求視頻。

YouTube servers processes the request and sends back the video data in binary packets.

YouTube 服務器會處理請求，並以二進制數據包的形式發回視頻數據。

Your ISP receives this data, forwards it to your router, which sends it back to your phone.

ISP 接收到這些數據後，將其轉發給路由器，再由路由器發送回手機。

Your phone reassembles these binary packets into the original form.

您的手機會將這些二進制數據包重新組合成原始格式。

Which, in this case, is the YouTube video.

在這種情況下，這就是 YouTube 視頻。

I don't really have an outro except subscribe.

除了訂閱，我沒有真正的結束語。

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WIFI 到底是怎麼運作的，一起來看！ (How WIFI Actually Works.)

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