Which three conditions can cause BGP neighbor establishment to fail? (Choose three.)
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A.
There is an access list blocking all TCP traffic between the two BGP neighbors.
B.
The EBGP neighbor ebgp-multihop option is set to the default value.
C.
The IBGP neighbor is not directly connected.
D.
BGP synchronization is enabled in a transit autonomous system with fully-meshed IBGP neighbors.
E.
The BGP update interval is different between the two BGP neighbors.
F.
The BGP neighbor is referencing an incorrect autonomous system number in its neighbor statement.