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6GK7343-1GX11-0XE0   新寧
6GK7343-1GX11-0XE0 新寧
產(chǎn)品價(jià)格:¥999(人民幣)
  • 規(guī)格:齊全
  • 發(fā)貨地:武漢
  • 品牌:
  • 最小起訂量:1999
  • 誠(chéng)信商家
    會(huì)員級(jí)別:標(biāo)準(zhǔn)會(huì)員
    認(rèn)證類型:企業(yè)認(rèn)證
    企業(yè)證件:通過(guò)認(rèn)證

    商鋪名稱:武漢路易達(dá)自動(dòng)化有限公司

    聯(lián)系人:郭先生(先生)

    聯(lián)系手機(jī):

    固定電話:

    企業(yè)郵箱:810334512@qq.com

    聯(lián)系地址:武漢市東西湖區(qū)走馬嶺匯通公路港A3-035

    郵編:430043

    聯(lián)系我時(shí),請(qǐng)說(shuō)是在焊材網(wǎng)上看到的,謝謝!

    商品詳情

      1990年,ABB公司開始雄心勃勃地將業(yè)務(wù)范圍擴(kuò)展到了中歐和東歐地區(qū), 并準(zhǔn)備將業(yè)務(wù)范圍擴(kuò)展到亞洲地區(qū),而在美國(guó)和西歐地區(qū)的收購(gòu)活動(dòng)逐 漸減慢,轉(zhuǎn)而從事合并和重組的活動(dòng)。 1991年,在中歐和東歐地區(qū)繼續(xù)進(jìn)行投資,到這一年底,

      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》

      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(wèn)題,但也導(dǎo)致了交換回路的產(chǎn)生,它會(huì)導(dǎo)致以下問(wèn)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(lái)阻止回路,而生成樹協(xié)議(Spa nning Tree Protocol)的作用正在于此。

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