Which statement about scalability in Cisco OTV is true?
A.
The control plane avoids flooding by exchanging MAC reachability.
B.
IP-based functionality provides Layer 3 extension over any transport.
C.
Any encapsulation overhead is avoided by using IS-IS.
D.
Unknown unicasts are handled by the authoritative edge device.
Explanation:
Cisco calls the underlying concept of OTV traffic forwarding “MAC routing”, since it behaves as if you
are routing Ethernet frames over the DCI transport. OTV uses a control plane protocol to proactively
propagate MAC address reachability before traffic is allowed to pass, which eliminates dependency
on flooding mechanism to either learn MAC addresses or forward unknown unicasts.http://www.computerworld.com/article/2515468/data-center/layer-2-data-center-interconnectoptions.html