单选题What Cisco technology protects against Spanning-Tree Protocol manipulation？（）A Spanning tree protectB Root Guard and BPDU GuardC Unicast Reverse Path ForwardingD MAC spoof guardE Port Security
单选题
What Cisco technology protects against Spanning-Tree Protocol manipulation？（）
A
Spanning tree protect
B
Root Guard and BPDU Guard
C
Unicast Reverse Path Forwarding
D
MAC spoof guard
E
Port Security
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