CCNP系列認(rèn)證CCNP(642-813)單項(xiàng)選擇題每日一練(2019.01.21)

Refer to the exhibit. DHCP snooping is enabled for selected VLANs to provide security on the network. 
How do the switch ports handle the DHCP messages？（）

.Refer to the exhibit and the partial configuration on routers R1 and R2. Hot Standby Routing  Protocol （HSRP） is configured on the network to provide network redundancy for the IP traffic. The  network administrator noticed that R2 does not become active when the R1 serial0 interface goes  down. 
What should be changed in the configuration to fix the problem？ （）

Refer to the exhibit. 
Which Virtual Router Redundancy Protocol （VRRP） statement is true about the roles of the master virtual router and the backup virtual router？（）

Cat6500（config）# router ospf 1 
Cat6500（config-router）# network 0.0.0.0 255.255.255.255 area 0 
Cat6500（config-router）# nsf Cat6500（config-router）#end 
Refer to the exhibit. The configuration is used to enable nonstop forwarding for OSPF on a Catalyst 6500 Series 
Switch with redundant supervisor engines. 
The default CEF configuration is unchanged. After testing， user traffic is interrupted and NSF is not operational. 
What is the most likely reason？ （）

Refer to the exhibit. HSRP has been configured and Link A is the primary route to router R4.  When Link A fails， router R2 （Link B） becomes the active router. 
Which router will assume the  active role when Link A becomes operational again？" （）