多项选择题
A. a shared single interface
B. the ability to track serial interfaces
C. UDP-based hello packets
D. the impact of flapping links if timers are too low
多项选择题 Hot Standby Router Protocol (HSRP) is able to provide network redundancy for IP networks. Concerning HSRP load sharing, which two descriptions make sense?（）
单项选择题 You have just configured HSRP group 10 in vour network, Which MAC address will your default gateway use? （）
单项选择题 Which tool allows a LAN client to determine which router should be the first hop to a particular remote destination, allowing simplified client configuration and processing without creating a single point of failure?（）