What are two benefits of DMVPN Phase 3? (Choose two.)
A. Administrators can use summarization of routing protocol updates from hub to spokes.
B. It introduces hierarchical DMVPN deployments.
C. It introduces non-hierarchical DMVPN deployments.
D. It supports L2TP over IPSec as one of the VPN protocols.
Benefits of DMVPN Phase 3 Design:
* Allows summarization of routing protocol updates from hub to spokes. The spokes no longer need to have an individual route with an IP next-hop of the tunnel IP address of the remote spoke for the networks behind all the other spokes. The spokes can use summarized routes or specific routes with an IP next-hop of the tunnel IP address of the hub and still be able to build spoke-to-spoke tunnels.
* Allows for hierarchical (greater than one level) and more complex tree-based DMVPN network topologies. Tree-based topologies allow the capability to build DMVPN networks with regional hubs that are spokes of central hubs. This architecture allows the regional hub to handle the data and NHRP control traffic for its regional spokes, but still allows spoke-to-spoke tunnels to be built between any spokes within the DMVPN network, whether they are in the same region or not. This architecture also allows the DMVPN network layout to more closely match regional or hierarchical data flow patterns.