单项选择题 Which CLI command is used to display BGP-learned routes that are now in the OSPF link-state database?（）

单项选择题 if all OSPF routers on a broadcast network have the same OSPF priority, which parameter is used to determine the new BDR at the time of a DR failure?（）

单项选择题 Given the set of routers, each with an interface on the same multi-access network: Which router can never be a designated router on that multi-access network?（）