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單項選擇題

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

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多項選擇題

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

多項選擇題

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