6GK1141-3CW52
交換機(jī)的三個(gè)主要功能： ·學(xué)習(xí)：以太網(wǎng)交換機(jī)了解每一端口相連設(shè)備的MAC地址，并將地址同 相應(yīng)的端口映射起來(lái)存放在交換機(jī)緩存中的MAC地址表中。 ·轉(zhuǎn)發(fā)/過(guò)濾：當(dāng)一個(gè)數(shù)據(jù)幀的目的地址在MAC地址表中有映射時(shí)，它被 轉(zhuǎn)發(fā)到連接目的節(jié)點(diǎn)的端口而不是所有端口（如該數(shù)據(jù)幀為廣播/組播幀 則轉(zhuǎn)發(fā)至所有端口）。 ·消除回路：當(dāng)交換機(jī)包括一個(gè)冗余回路時(shí)，以太網(wǎng)交換機(jī)通過(guò)生成樹(shù) 協(xié)議避免回路的產(chǎn)生，同時(shí)允許存在后備路徑。
6GK1141-3CW52
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》
6GK1141-3CW52
2000年5月2日，ABB公司出售核工業(yè)部門給BNFL公司的活動(dòng)停止。 2000年5月11日，ABB公司將股份出售給ALSTOM能源公司的活動(dòng)結(jié)束。 2000年6月8日，ABB公司意識(shí)到在可更新能源業(yè)務(wù)活動(dòng)發(fā)展上可以獲得 十億多美元的利潤(rùn)。 2000年9月12日，ABB公司為中國(guó)石油化工集團(tuán)公司投資了1億美元。 2000年10月5日，ABB公司與美國(guó)的合作者開(kāi)始聯(lián)合風(fēng)險(xiǎn)投資，開(kāi)始從 事信息技術(shù)產(chǎn)業(yè)。
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