A20B-1003-0045

快速以太網(wǎng)： 快速以太網(wǎng)（Fast Ethernet）也就是我們常說的百兆以太網(wǎng)，它在保 持幀格式、MAC（介質(zhì)存取控制）機(jī)制和MTU（最大傳送單元）質(zhì)量的前 提下，其速率比10Base－T的以太網(wǎng)增加了10倍。二者之間的相似性使 得10Base－T以太網(wǎng)現(xiàn)有的應(yīng)用程序和網(wǎng)絡(luò)管理工具能夠在快速以太網(wǎng) 上使用。快速以太網(wǎng)是基于擴(kuò)充的IEEE802.3標(biāo)準(zhǔn)。 千兆以太網(wǎng)：

A20B-1003-0045

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

A20B-1003-0045

以太網(wǎng)的工作原理 以太網(wǎng)采用帶沖突檢測(cè)的載波幀聽多路訪問（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，我們說以太網(wǎng)是一 種廣播網(wǎng)絡(luò)。 以太網(wǎng)的工作過程如下： 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)聽信道上是否有信號(hào)在傳輸。如果有的話，表明信道處于忙狀態(tài) ，就繼續(xù)監(jiān)聽，直到信道空閑為止。 2、若沒有監(jiān)聽到任何信號(hào)，就傳輸數(shù)據(jù) 3、傳輸?shù)臅r(shí)候繼續(xù)監(jiān)聽，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)）

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