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An engineer must design a VPN solution with this criteria: - Configured on an IOS XE router. - Able to terminate policy-based VPNs from Cisco and non-Cisco devices. - QoS can be applied on a per-tunnel basis. Which VPN technology must be used to accomplish this design?
Correct Answer: C
Multi-SA (Security Association) Virtual Tunnel Interfaces (VTIs) are the best fit for this scenario because they: - Are supported on Cisco IOS XE routers. - Allow the termination of policy-based VPNs from both Cisco and non-Cisco devices. - Support per-tunnel QoS, which is a key requirement in this scenario. Multi-SA VTIs support multiple security associations (SAs) per interface, allowing flexibility in policy-based and route-based VPNs. This makes it ideal for interoperability with non-Cisco VPN peers while allowing per-tunnel QoS configurations.