VLAN如何操作： ·配置在交換機上的每一個VLAN都能執行地址學習、轉發/過濾和消除 回路機制，就像一個獨立的物理網橋一樣。VLAN可能包括幾個端口 ·交換機通過將數據轉發到與發起端口同一VLAN的目的端口實現VLAN。 ·通常一個端口只運載它所屬VLAN的通信量。 VLAN的成員模式： 靜態：分配給VLAN的端口由管理員靜態（人工）配置。 動態：動態VLAN可基于MAC地址、IP地址等識別其成員資格。當使用MAC 地址時，通常的方式是用VLAN成員資格策略服務器（VMPS）支持動態VL AN。VMPS包括一個映射MAC地址到VLAN分配的數據庫。當一個幀到達動態 端口時，交換機根據幀的源地址查詢VMPS，獲取相應的VLAN分配。

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》

ABB集團執行副總裁尤柯爾 ABB公司在那些地區的雇員大約有10000名。越來越廣泛的重組活動是為 了滿足在北美和歐洲的部分地區經濟衰退的需要。這一年，ABB公司在 研究和發展上面的投資增加了20%。 1992年，公司裁員的速度繼續加快，雇員人數減少了14000名，在中歐 和東歐地區的雇員人數增加到了20000名，分布在30多家分公司。在亞 洲，通過聯合風險投資、收購、greenfield投資的方式開設了20多家分 公司和服務部門。

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