What is the function of the helper router during a restart event in OSPF?（）
- A、Sends Rapid Hellos to the restarting router.
- B、Maintains Adjancency with restarting router.
- C、Sends periodic DD packets to the restarting router.
- D、Floods Type 9 LSAs to all routers indicating a restarting event.
正确答案:B
答案解析:有
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