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1746-OG16

沖突（Collision）：在以太網中，當兩個數據幀同時被發到物理傳輸介 質上，并完全或部分重疊時，就發生了數據沖突。當沖突發生時，物理 網段上的數據都不再有效。 沖突域：在同一個沖突域中的每一個節點都能收到所有被發送的幀。 影響沖突產生的因素：沖突是影響以太網性能的重要因素，由于沖突的 存在使得傳統的以太網在負載超過40%時，效率將明顯下降。產生沖突 的原因有很多，如同一沖突域中節點的數量越多，產生沖突的可能性就 越大。此外，諸如數據分組的長度（以太網的最大幀長度為1518字節） 、網絡的直徑等因素也會影響沖突的產生。因此，當以太網的規模增大 時，就必須采取措施來控制沖突的擴散。通常的辦法是使用網橋和交換 機將網絡分段，將一個大的沖突域劃分為若干小沖突域。

1746-OG16

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》

1746-OG16

德國的排爆機器人 在法國，空軍、陸軍和警察署都購買了Cybernetics公司研制的TRS200 中型排爆機器人。DM公司研制的RM35機器人也被巴黎機場管理局選中。 德國駐波黑的維和部隊則裝備了Telerob公司的MV4系列機器人。中國沈 陽自動化所研制的PXJ-2機器人也加入了公安部隊的行列。 美國Remotec公司的Andros系列機器人受到各國軍警部門的歡迎，白宮 及國會大廈的警察局都購買了這種機器人。在南非總統選舉之前，警方 購買了四臺AndrosVIA型機器人，它們在選舉過程中總共執行了100多次 任務。Andros機器人可用于小型隨機爆炸物的處理，它是美國空軍客機 及客車上使用的唯一的機器人。

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