The value of true signifies that the NetBIOS names received
from this partner in the NetBIOS name list in its capabilities
exchange message are the only NetBIOS names reachable by
that partner. `False' indicates that other NetBIOS names may
be reachable. `False' should be returned before a Capabilities
Exchange message is received, if one is never received, or if
one is received without a NB Name Exclusivity CV.
If an implementation chooses to keep ciscoDlswTConnOperEntrys in
the `disconnected' state, this value should remain unchanged.