單項選擇題

關于STP的配置說法正確的有()

A.spanning-tree vlan 2root primary 將配置此交換機為根網橋
B.spanning-tree vlan 2root secondary 將配置此交換機為根網橋
C.spanning-tree vlan 2priority 4096將配置此交換機為根網橋
D.spanning-tree vlan 2root primary 配置后此交換機的優(yōu)先級變?yōu)?8672

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