Switches have a signaling channel between them called the Network-to-Network Interface (NNI).

交换机与交换机之间也拥有叫做网间界面(NNI)的信令信道。

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Switches have a signaling channel between them called the Network-to-Network Interface (NNI).

交换机与交换机之间也拥有叫做网间界面(NNI)的信令信道。

youdao