单项选择题
During OSPF adjacency formation， what state is a router in when it is sending LSA header information to its neighbor？ （）
A. Init B. 2Way C. ExStart D. Exchange
单项选择题 WhichstatementistrueaboutthefrequencyofOSPFLSAtransmissions？（）
单项选择题 Whattypeofroutercannotexistwithinastubarea？（）
单项选择题 IfallOSPFroutersonabroadcastnetworkhavethesameOSPFpriority，whatparameterisusedtodeterminethenewBDRatthetimeofaDRfailure？（）
