How is the client traffic sent back to Local-controller-1?

A client Roams from one Local controller-1 to another Local controller-2. The controllers are in different subnets and L3 Mobility is enabled.

How is the client traffic sent back to Local-controller-1?
A . IP-IP tunneled
B . FTP
C . Multicast
D . L2 GRE Tunnel
E . Routed locally

View Answer

Answer: D