简述分配阀紧急部的功用和构造。

A. 技术质量部牵头，项目部落实，做好原始资料的调查分析
B. 确定施工方案，编制施工预算
C. 施工项目技术交底
D. 安全教育与“四新”培训

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