A06B-6089-H104發(fā)那科

A06B-6089-H104

注意： 直通式的轉(zhuǎn)發(fā)速度大大快于存儲(chǔ)轉(zhuǎn)發(fā)模式，但可靠性要差一些，因?yàn)榭? 能轉(zhuǎn)發(fā)沖突 幀或帶CRC錯(cuò)誤的幀。 生成樹協(xié)議 消除回路： 在由交換機(jī)構(gòu)成的交換網(wǎng)絡(luò)中通常設(shè)計(jì)有冗余鏈路和設(shè)備。這種設(shè)計(jì)的 目的是防止一個(gè)點(diǎn)的失敗導(dǎo)致整個(gè)網(wǎng)絡(luò)功能的丟失。雖然冗余設(shè)計(jì)能夠 消除單點(diǎn)失敗的問題，但也導(dǎo)致了交換回路的產(chǎn)生，它會(huì)導(dǎo)致以下問題 。 ·廣播風(fēng)暴 ·同一幀的多份拷貝 ·不穩(wěn)定的MAC地址表 因此，在交換網(wǎng)絡(luò)中必須有一個(gè)機(jī)制來阻止回路，而生成樹協(xié)議（Spa nning Tree Protocol）的作用正在于此。

A06B-6089-H104

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》

A06B-6089-H104

1996年，西門子公司向中國市場推出了首款在中國本土生產(chǎn)的西門子手 機(jī)S4。 1997年10月，西門子專門為與中國125年的合作關(guān)系舉辦了慶典。慶典 期 間，西門子管理學(xué)院成立，為員工提供先進(jìn)的管理培訓(xùn)、商業(yè)和技能研 討會(huì)、職業(yè)和商務(wù)教育培訓(xùn)。 1998年，中國遭遇了百年不遇的特大洪水。西門子及其員工向受災(zāi)群眾 的捐贈(zèng)超過了450萬元人民幣，幫助他們重建家園。

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