A06B-0034-B175
注意：
直通式的轉發速度大大快于存儲轉發模式，但可靠性要差一些，因為可
能轉發沖突 幀或帶CRC錯誤的幀。
生成樹協議
消除回路：
在由交換機構成的交換網絡中通常設計有冗余鏈路和設備。這種設計的
目的是防止一個點的失敗導致整個網絡功能的丟失。雖然冗余設計能夠
消除單點失敗的問題，但也導致了交換回路的產生，它會導致以下問題
。
·廣播風暴
·同一幀的多份拷貝
·不穩定的MAC地址表
因此，在交換網絡中必須有一個機制來阻止回路，而生成樹協議（Spa
nning Tree Protocol）的作用正在于此。
A06B-0034-B175
聯系人：郭先生
聯系電話：18971415643《優先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優先》
A06B-0034-B175
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