1。 有阿∼∼ 忘了檔名，好像版本是 4.5 的。

2。802.1p A protocol that supports the mapping of RSVP signals to Layer 2 signals using 802.1p priority markings to enable the prioritization of traffic across Layer 2 devices, such as switches, on a network segment. IEEE 802 refers to the Layer 2 technology used by LANs including the data-link layer and the media access control layer.
沒什麼差吧。。。有區網就有差了。

3。下載速度加快，跟 802.1p 和 Error check 有關。。。
抱歉，CCNA 沒學好。。。。慚愧！！
另有高手幫個忙嗎？？