A. one global STP instance for all VLANs B. one STP instance for each VLAN C. one STP instance per set of VLANs D. one STP instance per set of bridges
A.歷史觀B.大局觀C.角色觀D.政治觀
A.長(zhǎng)遠(yuǎn)B.全面C.辯證D.獨(dú)特