The Outbound Route Filter (ORF) capability is negotiated between BGP neighbors during the BGP ____ process via the _____ message.

A.
route propagation; Update

B.
session establishment; Open

C.
route propagation; Notification

D.
route propagation; Route Refresh

E.
session establishment; Route Refresh

Explanation:
Capabilities are negotiated during session establishment in the open message. Appendix C P456 Internet routing Architectures.
Wrong
1. A needs to be decided before update
2. C notification is an error message
3. D not a message type
4. E not a message type