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AS-BVIC-205

以太網(wǎng)的工作原理 以太網(wǎng)采用帶沖突檢測(cè)的載波幀聽(tīng)多路訪(fǎng)問(wèn)（CSMA/CD）機(jī)制。以太網(wǎng) 中節(jié)點(diǎn)都可以看到在網(wǎng)絡(luò)中發(fā)送的所有信息，因此，我們說(shuō)以太網(wǎng)是一 種廣播網(wǎng)絡(luò)。 以太網(wǎng)的工作過(guò)程如下： 當(dāng)以太網(wǎng)中的一臺(tái)主機(jī)要傳輸數(shù)據(jù)時(shí)，它將按如下步驟進(jìn)行： 1、監(jiān)聽(tīng)信道上是否有信號(hào)在傳輸。如果有的話(huà)，表明信道處于忙狀態(tài) ，就繼續(xù)監(jiān)聽(tīng)，直到信道空閑為止。 2、若沒(méi)有監(jiān)聽(tīng)到任何信號(hào)，就傳輸數(shù)據(jù) 3、傳輸?shù)臅r(shí)候繼續(xù)監(jiān)聽(tīng)，如發(fā)現(xiàn)沖突則執(zhí)行退避算法，隨機(jī)等待一段 時(shí)間后，重新執(zhí)行步驟1（當(dāng)沖突發(fā)生時(shí)，涉及沖突的計(jì)算機(jī)會(huì)發(fā)送會(huì) 返回到監(jiān)聽(tīng)信道狀態(tài)。 注意：每臺(tái)計(jì)算機(jī)一次只允許發(fā)送一個(gè)包，一個(gè)擁塞序列，以警告所有 的節(jié)點(diǎn)）

AS-BVIC-205

聯(lián)系人：郭先生
聯(lián)系電話(huà)：18971415643《優(yōu)先》
座機(jī)：027-83238871
傳真：207-61537051
QQ：810334512《優(yōu)先》

AS-BVIC-205

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