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6GK7343-1GX11-0XE0   新寧
6GK7343-1GX11-0XE0 新寧
產(chǎn)品價格:¥999(人民幣)
  • 規(guī)格:齊全
  • 發(fā)貨地:武漢
  • 品牌:
  • 最小起訂量:1999
  • 誠信商家
    會員級別:標準會員
    認證類型:企業(yè)認證
    企業(yè)證件:通過認證

    商鋪名稱:武漢路易達自動化有限公司

    聯(lián)系人:郭先生(先生)

    聯(lián)系手機:

    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,請說是在焊材網(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)務范圍擴展到了中歐和東歐地區(qū), 并準備將業(yè)務范圍擴展到亞洲地區(qū),而在美國和西歐地區(qū)的收購活動逐 漸減慢,轉(zhuǎn)而從事合并和重組的活動。 1991年,在中歐和東歐地區(qū)繼續(xù)進行投資,到這一年底,

      聯(lián)系人:郭先生
      聯(lián)系電話:18971415643《優(yōu)先》
      座機:027-83238871
      傳真:207-61537051
      QQ:810334512《優(yōu)先》

      注意: 直通式的轉(zhuǎn)發(fā)速度大大快于存儲轉(zhuǎn)發(fā)模式,但可靠性要差一些,因為可 能轉(zhuǎn)發(fā)沖突 幀或帶CRC錯誤的幀。 生成樹協(xié)議 消除回路: 在由交換機構(gòu)成的交換網(wǎng)絡中通常設計有冗余鏈路和設備。這種設計的 目的是防止一個點的失敗導致整個網(wǎng)絡功能的丟失。雖然冗余設計能夠 消除單點失敗的問題,但也導致了交換回路的產(chǎn)生,它會導致以下問題 。 ·廣播風暴 ·同一幀的多份拷貝 ·不穩(wěn)定的MAC地址表 因此,在交換網(wǎng)絡中必須有一個機制來阻止回路,而生成樹協(xié)議(Spa nning Tree Protocol)的作用正在于此。

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