Which of the following is not considered a common approach to narrow the field of potential problem causes（）

A.The BGP session to the 10.1.1.1 neighbor is established
B.The router is trying to create a BGP peering session with the 10.1.1.1 neighbor
C.The BGP session to the 10.3.3.3 neighbor is created， but the router received no BGP routingupdates from the 10.3.3.3 neighbor
D.The router is attempting to establish a BGP peering session with the 10.2.2.2 neighbor

A.Extranet VPN
B.Managed overlay VPN topology
C.Hub-and-spoke VPN topology
D.Central-site VPN topology
E.Full mesh VPN topology
F.Remote-access VPN topology

A.The interface must be configured as a Multilink PPP interface.
B.The correct bandwidth should be configured on the interface.
C.A QoS policy must not be currently attached to the interface.
D.CEF must be enable
E.AutoQoS must be enabled globally before it can be enabled on the interface.
F.An IP address must be configured on the interface if its speed is equal to or less than 768 kbps.