LAN access switches LAN接入交换机设备
When switches are used as interconnection devices, there is no theoretical limit to the geographical reach of a LAN.
当开关被用作互相联络的装置时，本地网络的地理范围，理论上来说，是没有限制的。
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Designate one of the switches as the closest one to the root, for each LAN segment.
在每个区域网路区段中，选定一个最靠近根交换器的的交换器。
For instance, it uses Nortel Ethernet switches in the LAN.
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