A06B-0116-B275#0008
接口的工作模式 以太網(wǎng)卡可以工作在兩種模式下：半雙工和全雙工。 半雙工：半雙工傳輸模式實現(xiàn)以太網(wǎng)載波監(jiān)聽多路訪問沖突檢測。傳統(tǒng) 的共享LAN是在半雙工下工作的，在同一時間只能傳輸單一方向的數(shù)據(jù)。當兩個方向的數(shù)據(jù)同時傳輸時，就會產(chǎn)生沖突，這會降低以太網(wǎng)的效率。 全雙工：全雙工傳輸是采用點對點連接，這種安排沒有沖突，因為它們 使用雙絞線中兩個獨立的線路，這等于沒有安裝新的介質(zhì)就提高了帶寬 。例如在上例的車站間又加了一條并行的鐵軌，同時可有兩列火車雙向 通行。在全雙工模式下，沖突檢測電路不可用，因此每個全雙工連接只 用一個端口，用于點對點連接。標準以太網(wǎng)的傳輸效率可達到50%～60% 的帶寬，全雙工在兩個方向上都提供100%的效率。
A06B-0116-B275#0008
聯(lián)系人：郭先生
聯(lián)系電話：18971415643《優(yōu)先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優(yōu)先》
A06B-0116-B275#0008
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