单项选择题
HSRP has been configured between two Company devices. What kind of message does an HSRP configured router send out every 3 seconds？（）
A. Retire B. Coup C. Resign D. Send E. Hello
To protect against first-hop router failure， four proto...
多项选择题
To protect against first-hop router failure， four protocols were developed to ensure IP routing redundancy. Which of the following are they？（）
A. HSRP B. IRDP C. ICMP D. VRRP E. MSTP F. GLBP
HSRP is being set up between two Company devices. In w...
HSRP is being set up between two Company devices. In what three states is it possible for an HSRP router to be in？（）
A. Standby B. Established C. Active D. Idle E. Backup F. Init
R1 and R2 exchange HSRP between each other in the Compa...
R1 and R2 exchange HSRP between each other in the Company network. In which three HSRP states do routers send hello messages？（）
A. Learn B. Speak C. Standby D. Listen E. Active F. Remove
