IC697ALG440
IC697ALG440
IC697ALG440
按速率來分可以分為單10M、100M、1000M的光纖收發(fā)器、10/100M自適應(yīng)、10/100/1000M自適應(yīng)的光纖收發(fā)器。其中多數(shù)單10M、100M和1000M的收發(fā)器產(chǎn)品工作在物理層，在這一層工作的收發(fā)器產(chǎn)品是按位來轉(zhuǎn)發(fā)數(shù)據(jù)。該轉(zhuǎn)發(fā)方式具有轉(zhuǎn)發(fā)速度快、時延低等方面的優(yōu)勢，適合應(yīng)用于速率固定的鏈路上。而10/100M、10/100/1000M光纖收發(fā)器是工作在數(shù)據(jù)鏈路層，使用存儲轉(zhuǎn)發(fā)的機制，這樣轉(zhuǎn)發(fā)機制對接收到的每一個數(shù)據(jù)包都要讀取它的源MAC地址、目的MAC地址和數(shù)據(jù)凈荷，并在完成CRC循環(huán)冗余校驗以后才將該數(shù)據(jù)包轉(zhuǎn)發(fā)出去。
【公 司】： 廈門泰尼電氣有限公司
【主 營】： AB、GE、施耐德等各類PLC產(chǎn)品
【價 格】： 電議
【發(fā)布人】： 張亮
【電 話】： 18030028083
【所在地】： 福建 - 廈門
【座 機】： 0592-6809819
【來 源】： 供應(yīng)信息 > 電工、電氣 > PLC
【Q Q】： 2314094943
存儲轉(zhuǎn)發(fā)的好處一來可以防止一些錯誤的幀在網(wǎng)絡(luò)中傳播，占用寶貴的網(wǎng)絡(luò)資源，同時還可以很好地防止由于網(wǎng)絡(luò)擁塞造成的數(shù)據(jù)包丟失，當數(shù)據(jù)鏈路飽和時存儲轉(zhuǎn)發(fā)可以將無法轉(zhuǎn)發(fā)的數(shù)據(jù)先放在收發(fā)器的緩存中，等待網(wǎng)絡(luò)空閑時再進行轉(zhuǎn)發(fā)。這樣既減少了數(shù)據(jù)沖突的可能又保證了數(shù)據(jù)傳輸?shù)目煽啃?，因?0/100M、10/100/1000M的光纖收發(fā)器適合于工作在速率不固定的鏈路上。
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