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交換機的三個主要功能： ·學習：以太網交換機了解每一端口相連設備的MAC地址，并將地址同 相應的端口映射起來存放在交換機緩存中的MAC地址表中。 ·轉發/過濾：當一個數據幀的目的地址在MAC地址表中有映射時，它被 轉發到連接目的節點的端口而不是所有端口（如該數據幀為廣播/組播幀 則轉發至所有端口）。 ·消除回路：當交換機包括一個冗余回路時，以太網交換機通過生成樹 協議避免回路的產生，同時允許存在后備路徑。

6181-AFEDBCZZZ

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》

6181-AFEDBCZZZ

排除爆炸物機器人有輪式的及履帶式的，它們一般體積不大，轉向靈 活，便于在狹窄的地方工作，操作人員可以在幾百米到幾公里以外通過 無線電或光纜控制其活動。機器人車上一般裝有多臺彩色CCD攝像機用 來對爆炸物進行觀察；一個多自由度機械手，用它的手爪或夾鉗可將爆 炸物的引信或雷管擰下來，并把爆炸物運走；車上還裝有獵槍，利用激 光指示器瞄準后，它可把爆炸物的定時裝置及引爆裝置擊毀；有的機器 人還裝有高壓水槍，可以切割爆炸物。

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