多选题The OSPF hello protocol performs which of the following tasks?（）AIt provides dynamic neighbor discoveryBIt detects unreachable neighbors in 90 second intervalsCIt maintains neighbor relationshipsDIt negotiates correctness parameters between neighboring interfacesEIt uses timers to elect the router witch the fastest links as the designated routerFIt broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
多选题
The OSPF hello protocol performs which of the following tasks?（）
A
It provides dynamic neighbor discovery
B
It detects unreachable neighbors in 90 second intervals
C
It maintains neighbor relationships
D
It negotiates correctness parameters between neighboring interfaces
E
It uses timers to elect the router witch the fastest links as the designated router
F
It broadcasts hello packets throughout the internetwork to discover all routers that are running OSPF
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