Redundant power supplies,hot-swappable modules and Spanning Tree Protocol (STP) support are all mandatory elements of a backbone switch,as is support for emerging switch technologies,including virtual LANs.
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- 具有冗余能力的電源、可熱插拔的模塊和對生成樹(shù)協(xié)議（STP）的支持都是基干交換機必備的成分，實(shí)際上它支持新出現的交換技術(shù)，如虛擬局域網(wǎng)。
