A customer is planning on moving their secondary data center to a cloud-based laaS.

A. Systems running on Azure will need to go through the main data center to access the services on Oracle Cloud. This is because the Oracle Cloud is not directly connected to the Azure Cloud. The traffic will need to go through the main data center in order to reach the Oracle Cloud.

C. Branch FortiGate devices must be configured as VPN clients for the branches' internal network to be able to access Oracle services without using public IPs. This is because the Oracle Cloud does not allow direct connections from the internet. The traffic will need to go through the FortiGate devices in order to reach the Oracle Cloud.

The other options are not correct.

B. Use FortiGate VM for IPSEC over ExpressRoute, as traffic is not encrypted by Azure. This is not necessary. Azure does encrypt traffic over ExpressRoute.

D. Two ExpressRoute services to the main data center are required to implement SD-WAN between a FortiGate VM in Azure and a FortiGate device at the data center edge. This is not necessary. A single ExpressRoute service can be used to implement SD-WAN between a FortiGate VM in Azure and a FortiGate device at the data center edge.

https://learn.microsoft.com/en-us/azure/expressroute/expressroute-about-encryption