A16B-1211-0820

集线器的工作特点： 集线器多用于小规模的以太网，由于集线器一般使用外接电源（有源） ，对其接收的信号有放大处理。在某些场合，集线器也被称为“多端口 中继器”。 集线器同中继器一样都是工作在物理层的网络设备。 共享式以太网存在的弊端：由于所有的节点都接在同一冲突域中，不管 一个帧从哪里来或到哪里去，所有的节点都能接受到这个帧。随着节点 的增加，大量的冲突将导致网络性能急剧下降。而且集线器同时只能传 输一个数据帧，这意味着集线器所 有端口都要共享同一带宽。 交换式以太网

A16B-1211-0820

联系人：郭先生
联系电话：18971415643《优先》
座机：027-83238871
传真：207-61537051
QQ：810334512《优先》

A16B-1211-0820

高压产品：互感器、气体绝缘、电容器、高压避雷器、断路器、模块。 变压器组件：电源组件、油处理 [英文]、套管、调压开关、配电变压 器组件、熔丝、Composites [英文]、Vacuum Plants [英文]。 控制系统：800xA、Advant 开放式控制系统，带Master软件、Advant 开放式控制系统，带MOD 300软件、Freelance、Melody 系列、SATT、S ymphony DCI 系列、Symphony Harmony INFI 90 系列、紧凑型800、Se rvices [英文]、Symphony Plus [英文]。

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