單項(xiàng)選擇題

當(dāng)路由器在經(jīng)歷了OSPF交換協(xié)議,它以什么順序通過每個(gè)狀態(tài)呢?()

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

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