Exhibit

What can prevent the corresponding BGP session from being successfully established?

A.
CK2 and CK5 cannot establish the IBGP session if the BGP Hello Timer between the two IBGP neighbors is different.

B.
CK1 and CK2 cannot establish the EBGP session if the BGP Hello Timer between the two EBGP neighbors are different.

C.
CK1 and CK2 cannot establish the EBGP session using the loopback0 interface if the EBGP-mutlihop value is set to 2.

D.
CK2 and CK5 cannot establish the IBGP session because they are not using the loopback0 interface to establish the IBGP session.

E.
CK2 and CK5 cannot establish the IBGP session if CK3 and CK4 have an access list permitting only TCP port 80 and IP protocol number 89 traffic.