You may find that you have been disconnected from a wireless network even
though you wanted to stay connected. Your computer will normally try to
reconnect to the network as soon as this happens (the network icon on the top
bar will display three dots if it is trying to reconnect), but it can be
annoying, especially if you were using the internet at the time.
无线信号太弱
常见的中断原因是信号太弱，无线网络有一个覆盖范围，因此如果您离无线基站太远，可能会因为信号太弱而不能保持连接。墙和其他阻挡的物体会减弱信号。
顶部面板上的网络图标会显示信号的强度，如果信号看着很低，试着离无线基站近一些。
网络连接建立不正确
Sometimes, when you connect to a wireless network, it may appear that you
have successfully connected at first, but then you will be disconnected soon
after. This normally happens because your computer was only partially
successful in connecting to the network — it managed to establish a connection,
but was unable to finalize the connection for some reason and so was
disconnected.
一个可能的原因是您输入的无线连接参数不正确，或者您的计算机不被允许连接(比如连接需要用户名来登录)。
不可靠的无线设备硬件/驱动
有些无线网络硬件可能不太可靠。无线网络很复杂，因此无线适配器和基站偶尔会出现小问题并失去连接。这种情况会造成很大不便，但在很多设备上却很常见。如果您经常从无线连接断开，这可能会是一个重要原因。如果频繁发生，您要考虑使用不同的硬件。
无线网络忙
无线网络处于忙碌状态(比如在校园或者咖啡店)，常常会有许多计算机尝试同时连接，这样网络有时会变得非常忙碌，一些计算机就不能连接上，而其他一些会掉线。
更多信息
Wireless networking —
Connect to Wi-Fi,
hidden networks,
Wi-Fi disconnecting…
网络问题 —
Troubleshooting wireless connections,
finding your Wi-Fi network…
亦见
连接到一个无线网络 — Get on the internet — wirelessly.