单项选择题 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？（）

单项选择题 Exhibit： Exhibit：   You work as a network engineer at Company. You study the exhibit carefully. Which GLBP  device hosts receive the MAC address assignment？（）

多项选择题 On a 3550 EMI switch，  which three types of interfaces can be used to configure HSRP？ （）