A.When manual summarization is configured, the router immediately creates a route that points to null0 interface
B.Manual route summarization  is configured in router configuration mode when the router is configured for EIGRP routing
C.Manual route summarization is configured on the interface
D.The ip summary - address eigrp command generates a default route with an administrative distance  of 5
E.When manual summarization is configured, the summary route will use the metric of the largest specific metric of the summary routes
F.The ip summary - address eigrp command generates a default route with an administrative distance of 90

A.Router R1 is waiting for a reply from the neighbor 10.1.2.1 to the hello message sent out inquiring for a second successor to network 10.6.1.0/24
B.Router R1 can send traffic destined for network 10.6.1.0/24 out of interface FastEthernet0/0
C.Router R1 is waiting for a reply from the neighbor 10.1.2.1 to the hello message sent out before it declares the neighbor unreachable
D.Router R1 is waiting for a reply from the neighbor 10.1.2.1 in response to the query sent out about network 10 .6.1.0/24