CCNP系列认证CCNP(642-813)单项选择题每日一练(2018.10.29)

单项选择题
A port in a redundant topology is currently in the blocking state and is not receiving BPDUs. To ensure that this port does not erroneously transition to the forwarding state， which command should be configured to satisfy the requirement？（）
A.Switch（config）#spanning-tree loopguard default
B.Switch（config-if）#spanning-tree bdpufilter
C.Switch（config）#udld aggressive
D.Switch（config-if）#spanning-tree bpduguard
单项选择题
You want to configure switch R1 to propagate VLAN information across the Company network using VTP. What must be configured on a Cisco switch in order to advertise VLAN information？（）
A.VTP mode
B.VTP password
C.VTP revision number
D.VTP pruning
E.VTP domain name
F.None of the other alternatives apply
单项选择题
Network topology exhibit： Interface VLAN 101 exhibit： Interface VLAN 102 exhibit： Interface VLAN 104 exhibit： Interface VLAN 105 exhibit： You work as a network technician at. You study the network topology and the other exhibits carefully. Consider the distribution switches 1 and 2. 1 is the primary device for Vlan 101， 102， 105. 2 is the primary device for Vlan 103 and 104 Note： Please refer to the #2 scenario. During routine maintenance， it became necessary to shutdown G1/0/1 on1 and2. All other interface were up. During this time，1 became the active device for Vlan104’s HSRP group. As related to Vlan104’s HSRP group. What can be done to make the group function properly ？（）
A.On 1， disable preempt
B.On 2， decrease the priority value to a value less than 150
C.On 1， increase the decrement value in the track command to a value greater than 6
D.On 1， disable track command.
单项选择题
You administer a network that uses two routers， R1 and R2， configured as an HSRP group to provide redundancy for the gateway. Router R1 is the active router and has been configured as follows： R1#configure terminal R1（config）#interface fa0/0 R1（config-if）#ip address 10.10.0.5 255.255.255.0 R1（config-if）#standby 1 priority 150 R1（config-if）#standby preempt delay minimum 50 R1（config-if）#standby 1 track interface fa0/2 15 R1（config-if）#standby 1 ip 10.10.0.20 Which of the following describes the effect the standby preempt delay minimum 50 command will have on router R1？（）
A. The HSRP priority for router R1 will increase to 200.
B. Router R1 will become the standby router if the priority drops below 50.
C. The HSRP priority for router R1 will decrease to 50 points when Fa0/2 goes down.
D. Router R1 will wait 50 seconds before attempting to preempt the active router.
单项选择题
Refer to the exhibit. Switch 15 is configured as the root switch for VLAN 10 but not for VLAN 20. If the STP configuration is correct， what will be true about Switch 15？（）
A.All ports will be in forwarding mode.
B.All ports in VLAN 10 will be in forwarding mode.
C.All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in blocking mode.
D.All ports in VLAN 10 will be in forwarding mode and all ports in VLAN 20 will be in standby mode.