多项选择题 During a redistribution of routes from OSPF into EIGRP, an ad ministrator notices that none of the OSPF routes are showing in EIGRP. What are two possible causes?（）

单项选择题 If a metric is not specified for routes that are redistributed into OSPF, the defaul t metric that is assigned to the routes is 20, except for redistributed BGP routes. What is the metric that is assigned to redistributed BGP routes?（）

单项选择题 Refer to the exhibit. Which interoperability technique implemented on the dual - stack routers would allow connectivity between IPv6 sites across automatic created tunnels using the 2002::/16 prefix? （）