单项选择题
A.switch-1 will drop the data because it dose not have an entry for that MAC address
B.switch-1 will flood the data out all of its port from which the data originated
C.switch-1 will forward the data to its default gateway
D.tch-1 will send an ARP request out all its ports except the port from which the data originated
单项选择题 What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）
单项选择题 Refer to the exhibit. Based on the information given. Which switch will be elected root bridge and why?（）
多项选择题 For what two purposes does the Ethernet protocol use physical addresses? （）
