这是一个用HTML5写的一个模仿流行雨的动画效果，点击鼠标可以加速，移动鼠标可以改变方向，自己看看吧，很漂亮的哦，我不会告诉你我一直盯着它看了一小时的-This is a HTML5 write a parody of the popular rain animation, can accelerate the click of a mouse, move the mouse to change direction, to see for yourself! Very beautiful Oh,

Follow RFC 3531* method if possible Start assigning subnets away from the bit boundaries in the addressing plan Leave the space around the bit boundaries unassigned as long as possible This provides flexibility if there is a future requirement