6GK7243-2AX01-0XA0西門子報(bào)價(jià)

6GK7243-2AX01-0XA0

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。

6GK7243-2AX01-0XA0

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》

6GK7243-2AX01-0XA0

人工智能在計(jì)算機(jī)上實(shí)現(xiàn)時(shí)有2種不同的方式。一種是采用傳統(tǒng)的編程 技術(shù)，使系統(tǒng)呈現(xiàn)智能的效果，而不考慮所用方法是否與人或動(dòng)物機(jī)體 所用的方法相同。這種方法叫工程學(xué)方法（ENGINEERING APPROACH）， 它已在一些領(lǐng)域內(nèi)作出了成果，如文字識(shí)別、電腦下棋等。另一種是 模擬法（MODELING APPROACH），它不僅要看效果，還要求實(shí)現(xiàn)方法也 和人類或生物機(jī)體所用的方法相同或相類似。遺傳算法（GENERIC AL GORITHM，簡(jiǎn)稱GA）和人工神經(jīng)網(wǎng)絡(luò)（ARTIFICIAL NEURAL NETWORK， 簡(jiǎn)稱ANN）均屬后一類型。

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