单项选择题
A. Router R2 will become the master for Virtual Router 1， and router R1 will become the backup for Virtual Router 2.
B. Router R1 will become the master for Virtual Router 1， and router R2 will become the backup for Virtual Router 2.
C. Router R1 will become the active virtual gateway.
D. Router R2 will become the active virtual gateway.
E. The hello and hold timers are incompatible with OSPF type 5 LSAs.
F. The hello and hold timers are incompatible with multi-homed BGP.
单项选择题 .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？ （）
单项选择题 Refer to the exhibit. Based on the debug standby output in the exhibit， which HSRP statement is true？ （）
单项选择题 Refer to the exhibit. Based on the debug standby output in the exhibit， which HSRP statement is true？（）
