A16B-1010-0150

勇擔責任 致力于符合道德規范的、負責任的行為 西門子努力滿足一切法律和道德要求，并且，只要可能，我們還努力超 越這些要求。我們的責任是按照最高的職業和道德標準和慣例來開展業 務：公司絕不容忍任何不合規的行為。 我們在“勇擔責任”方面的原則堪稱我們制定業務決策的指南針。我們 還必須鼓勵我們的商業伙伴、供應商和其他利益相關者遵循同樣高的道 德標準。

A16B-1010-0150

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》

A16B-1010-0150

以太網的工作原理 以太網采用帶沖突檢測的載波幀聽多路訪問（CSMA/CD）機制。以太網 中節點都可以看到在網絡中發送的所有信息，因此，我們說以太網是一 種廣播網絡。 以太網的工作過程如下： 當以太網中的一臺主機要傳輸數據時，它將按如下步驟進行： 1、監聽信道上是否有信號在傳輸。如果有的話，表明信道處于忙狀態 ，就繼續監聽，直到信道空閑為止。 2、若沒有監聽到任何信號，就傳輸數據 3、傳輸的時候繼續監聽，如發現沖突則執行退避算法，隨機等待一段 時間后，重新執行步驟1（當沖突發生時，涉及沖突的計算機會發送會 返回到監聽信道狀態。 注意：每臺計算機一次只允許發送一個包，一個擁塞序列，以警告所有 的節點）

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