单项选择题

If a port configured with STP loop guard stops receiving BPDUs， the port will be put into which state？（）

A.learning state
B.listening state
C.forwarding state
D.root-inconsistent state

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多项选择题

Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree Protocol IEEE 802.1D？（）

A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay

单项选择题

Which of these best describes the actions taken when a VTP message is received on a switch configured with the VTP mode "transparent"？（）

A.VTP updates are ignored and forwarded out all ports
B.VTP updates are ignored and forwarded out trunks only
C.VTP updates are made to the VLAN database and are forwarded out trunks only
D.VTP updates are ignored and are not forwarded

单项选择题

When STP UplinkFast is enabled on a switch utilizing the default bridge priority， what will the new bridge priority be changed to？（）

A.8192
B.16384
C.49152
D.65535