When using Correct Addressing, what is the out-of-band (OOB) splice connection described as?

A.
A virtual connection contained within one of the inner-connections which corresponds to a client-server
connection
B.
A separate connection between the Primary IP addresses of the client and server Steelhead appliances
C.
A separate inner-connection between two Steelhead appliances not directly related to any one of the user
inner connections
D.
No such construct exists