单项选择题

Refer to the exhibit. In the diagram, the switches are running IEEE 802.1w RSPT. On which ports should root guard be enabled in order to facilitate deterministic root bridge election under normal and failure scenarios? （）

A.GE-3/1，GE-3/2
B.FE-2/1，FE-3/2
C.GE-1/1，GE-1/2
D.GE-4/1，GE-4/2
E.GE-2/1，GE-2/2
F.GE-3/1，GE-3/2，GE-4/1，GE-4/2，FE-2/1，FE-3/2

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相关考题

单项选择题

Refer to the exhibit. In the diagram, the switches are running IEEE 802.1s MST. Which ports are in the MST blocking state?（）

A.GE-1/2 and GE 2/1
B.GE-1/1 and GE-2/2
C.GE-3/2 and GE 4/1
D.no ports are in the blocking state
E.There is not enough information to determine which ports are in the blocking state

多项选择题

What two features in Cisco switches help prevent Layer 2 loops？（）

A.UniDirectional Link Detection
B.Hot Standby Router Protocol
C.Virtual Router Redundancy Protocol
D.PortFast
E.root guard
F.loop guard

问答题

ipv6 Solicited-Node Multicast Address有什么作用，2个作用只要说出一个？