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。
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。
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。
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