Refer to the exhibit. Which statement is true about the output？（）
A.The port on switch CAT1 is forwarding and sending BPDUs correctly.
B.The port on switch CAT1 is blocking and sending BPDUs correctly.
C.The port on switch CAT2 is forwarding and receiving BPDUs correctly.
D.The port on switch CAT2 is blocking and sending BPDUs correctly.
E.The port on switch CAT3 is forwarding and receiving BPDUs correctly.
F.The port on switch CAT3 is forwarding， sending， and receiving BPDUs correctly.
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Refer to the exhibit.
What does the command channel-group 1 mode desirable do？ （）
A.enables LACP unconditionally
B.enables PAgP only if a PAgP device is detected
C.enables PAgP unconditionally
D.enables Etherchannel only
E.enables LACP only if a LACP device is detected
Refer to the exhibit. Initially， LinkA is connected and forwarding traffic. A new LinkB is then attached between SwitchA and HubA.
Which two statements are true about the possible result of attaching the second link？（）
A.The switch port attached to LinkB will not transistion to up.
B.One of the two switch ports attached to the hub will go into blocking mode when a BPDU is received.
C.Both switch ports attached to the hub will transition to the blocking state.
D.A heavy traffic load could cause BPDU transmissions to be blocked and leave a switching loop.
E.The switch port attached to LinkA will immediately transition to the blocking state.
A.All ports will temporarily transition to the learning state for a period equal to the max age timer plus the forward delay interval.
B.All ports will transition temporarily to the learning state for a period equal to the forward delay interval.
C.The default aging time for MAC address entries will be reduced for a period of the max age timer plus the forward delay interval.
D.The default hello time for configuration BDPUs will be reduced for the period of the max age timer.
A.The port immediately transitions to the Forwarding state.
B.The switch generates a Topology Change Notification （TCN） BPDU.
C.The port immediately transitions to the err-disable state.
D.The port becomes a normal STP switch port.
A.RSTP information is automatically aged out.
B.The port sends a TCN to the root bridge.
C.The port moves to listening state.
D.The port becomes a normal spanning tree port.
最新試題
Which two statements are true when the extended system ID feature is enabled？ （）
Refer to the exhibit. The command switchport mode access is issued on interface FastEthernet0/13 on switch CAT1. What will be the result？（）
DS2 has not become the active device for Vlan103’s HSRP group even though all interfaces are active. As related to Vlan103’s HSRP group. What can be done to make the group function properly ？ （）
Which two statements are true about BPDU port-guard and BPDU filtering？（）
Refer to the exhibit. Initially， LinkA is connected and forwarding traffic. A new LinkB is then attached between SwitchA and HubA. Which two statements are true about the possible result of attaching the second link？（）
Refer to the exhibit. What will happen when one more user is connected to interface FastEthernet 5/1？ （）
Which three statements about STP timers are true？（）
Refer to the exhibit. Based on the output of the show spanning-tree command， which statement is true？ （）
Which two statements about the various implementations of STP are true？（）
Which router redundancy protocol cannot be configured for interface tracking？（）