A06B-0522-B251

戰后發展 在二十世紀五十年代，S&H開始生產計算機、半導體設備、洗衣機和心 臟起搏器。 1966年，西門子股份公司（Siemens AG）成立。 1967年，西門子股份公司和羅伯特·博世有限公司成立主要生產白色家 電的合資企業博西家用電器公司（BSH），后成為德國和西歐家電市場的 領導者。 1980年，公司的第一臺數字電話交換機下線。 1988年，西門子和通用電氣收購英國防務和技術公司Plessey。因為Pl essey公司的持有人分裂，因此西門子接收了其航空電子、雷達和交通 控制部分，并更名為Siemens Plessey。 九十年代

A06B-0522-B251

聯系人：郭先生
聯系電話：18971415643《優先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優先》

A06B-0522-B251

注意：雖然VLAN是在交換機上劃分的，但交換機是二層網絡設備，單一 的有交換機構成的網絡無法進行VLAN間通信的，解決這一問題的方法是 使用三層的網絡設備-路由器。路由器可以轉發不同VLAN間的數據包， 就像它連接了幾個真實的物理網段一樣。這時我們稱之為VLAN間路由。

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