Merge pull request #209605 from MartinPankraz/add-sap-dmz-arch-ref

add SAP DMZ architecture reference

Author: prmerger-automator[bot]

articles/virtual-machines/workloads/sap/expose-sap-process-orchestration-on-azure.md

@@ -26,7 +26,7 @@ Existing implementations based on SAP middleware often relied on SAP's proprieta
 Dispatching approaches range from traditional reverse proxies like Apache, to Platform-as-a-Service (PaaS) options like the [Azure Load Balancer](../../../load-balancer/load-balancer-overview.md), or the opinionated SAP WebDispatcher. The overall concepts described in this article apply to the options mentioned. Have a look at SAP's [wiki](https://wiki.scn.sap.com/wiki/display/SI/Can+I+use+a+different+load+balancer+instead+of+SAP+Web+Dispatcher) for their guidance on using non-SAP load balancers.
 
 > [!NOTE]
-> All described setups in this article assume a hub-spoke networking topology, where shared services are deployed into the hub. Given the criticality of SAP, even more isolation may be desirable.
+> All described setups in this article assume a hub-spoke networking topology, where shared services are deployed into the hub. Given the criticality of SAP, even more isolation may be desirable. For more information, see our SAP perimeter-network design (also known as DMZ) [guide](/azure/architecture/guide/sap/sap-internet-inbound-outbound#network-design).
 
 ## Primary Azure services used