Which VPN technology leverages replication in the network core and provides for efficient bandwidth optimization?

You are deploying a nationwide intranet solution for a company with 4 data centers and 400 remote branches connected via a provider-based solution. As part of the network design, you must ensure efficient content distribution of training material to remote sites.

Which VPN technology leverages replication in the network core and provides for efficient bandwidth optimization?
A . VPLS
B . IPsec
C . GRE
D . MPLS Layer 3 VPN

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Answer: D