单项选择题
A.exstart state>exchange state>loading state>full state
B.exstart state>full state>loading state>exchange state
C.Loading state>exchange state>full state>exstart state
D.exstart state>loading state>exchange state>full state
单项选择题 What is a global command?（）
单项选择题 In a switched environment, what does the IEEE 802.1Q standard describe?（）
单项选择题 The network administrator needs to address seven LANs. RIP version 1 is the only routing protocol in use on the network and subnet 0 is not being used. What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?（）