A16B-1211-0820發那科

A16B-1211-0820

集線器的工作特點： 集線器多用于小規模的以太網，由于集線器一般使用外接電源（有源） ，對其接收的信號有放大處理。在某些場合，集線器也被稱為“多端口 中繼器”。 集線器同中繼器一樣都是工作在物理層的網絡設備。 共享式以太網存在的弊端：由于所有的節點都接在同一沖突域中，不管 一個幀從哪里來或到哪里去，所有的節點都能接受到這個幀。隨著節點 的增加，大量的沖突將導致網絡性能急劇下降。而且集線器同時只能傳 輸一個數據幀，這意味著集線器所 有端口都要共享同一帶寬。 交換式以太網

A16B-1211-0820

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》

A16B-1211-0820

高壓產品：互感器、氣體絕緣、電容器、高壓避雷器、斷路器、模塊。 變壓器組件：電源組件、油處理 [英文]、套管、調壓開關、配電變壓 器組件、熔絲、Composites [英文]、Vacuum Plants [英文]。 控制系統：800xA、Advant 開放式控制系統，帶Master軟件、Advant 開放式控制系統，帶MOD 300軟件、Freelance、Melody 系列、SATT、S ymphony DCI 系列、Symphony Harmony INFI 90 系列、緊湊型800、Se rvices [英文]、Symphony Plus [英文]。

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