Select the three valid LMI extension:
A.
Multicasting
B.
Global addressing
C.
Forward-explicit congestion notification (FECN)
D.
Virtual circuit status messages.
E.
Backward-explicit congestion notification (BECN)
Explanation:
Optional LMI Extensions:
The LMI specification also defines several optional extensions:
* Global addressing convention
* Multicast capability
* A simple flow control mechanism
* Ability for the network to communicate a PVC’s CIR to the subscriber in a Status message
* A new message type that allows the network to announce PVC status changes without
prompting from the subscriber
Implementors may build any, all, or none of these features into their networks.