Update 2-determine-uses.md

Author: staleycyn

learn-pr/wwl-azure/configure-vnet-peering/includes/2-determine-uses.md

@@ -34,4 +34,21 @@ Consider the benefits of using Azure Virtual Network peering.
 | **Strong performance** | Because Azure Virtual Network peering utilizes the Azure infrastructure, you gain a low-latency, high-bandwidth connection between resources in different virtual networks. |
 | **Simplified communication** | Azure Virtual Network peering lets resources in one virtual network communicate with resources in a different virtual network, after the virtual networks are peered. |
 | **Seamless data transfer** | You can create an Azure Virtual Network peering configuration to transfer data across Azure subscriptions, deployment models, and across Azure regions. |
-| **No resource disruptions** | Azure Virtual Network peering doesn't require downtime for resources in either virtual network when creating the peering, or after the peering is created. |
+| **No resource disruptions** | Azure Virtual Network peering doesn't require downtime for resources in either virtual network when creating the peering, or after the peering is created. |
+
+### Things to know about peering requirements and limitations
+
+While VNet peering provides many benefits, there are important constraints to understand.
+
+| Requirements/Limitations | Description |
+| --- | --- |
+| Non-overlapping address spaces |	Peered virtual networks must have non-overlapping IP address spaces. Peering creation will fail if address ranges overlap. |
+| Address space modification restrictions	| If you want to change a VNet's address range, you need to delete the peering first, update the address space, and then set up the peering again. |
+| Basic Load Balancer limitations| Resources in one VNet can’t communicate with Basic Internal Load Balancer IPs in VNets peered across regions. Use the Standard Load Balancer for cross-region connections. |
+| DNS resolution boundaries |Azure's built-in name resolution does not work across peered VNets. Configure Azure Private DNS zones or custom DNS servers for cross-VNet name resolution. |
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