Interview Questions - SD-WAN Architecture

INTERVIEWER : SD-WAN fabric is :
ANSWER : It is also called an overlay network, it forms a software overlay that runs over standard network transport services including internet, PSTN and MPLS.
INTERVIEWER : Which layer in SD-WAN architecture has proxy and gateways ?
ANSWER : cloud edge layer
INTERVIEWER : Remote site is connected to SD WAN fabric with :
ANSWER : SD WAN overlays
INTERVIEWER : core DC is connected to Vnet/VPC :
ANSWER : CSP direct connectivity
INTERVIEWER : Function of SD WAN controller .
ANSWER : to manage all the resources or key assets on the service defined wide area network.