Click on one of the red buttons to send a packet that is dropped by the router because of an invalid address.

点击任何一个红色按钮是发送一个带有非法地址而被路由器丢弃的数据包。

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Click inside the red bounding box in one of these 2d views, and then drag the fence upward until it's closer to the floor.

在任意二位试图中的红色边框内点击，然后向上拖拽防护围栏直到它紧贴地板。

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Click inside the red bounding box in one of these 2d views, and then drag the fence upward until it's closer to the floor.

在任意二位试图中的红色边框内点击，然后向上拖拽防护围栏直到它紧贴地板。

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