Update application-gateway-faq.yml

Author: jaesoni

articles/application-gateway/application-gateway-faq.yml

@@ -6,7 +6,7 @@ metadata:
   author: greg-lindsay
   ms.service: application-gateway
   ms.topic: faq
-  ms.date: 03/15/2024
+  ms.date: 06/27/2024
   ms.author: greglin
   ms.custom: references_regions, devx-track-azurepowershell
 title: Frequently asked questions about Application Gateway
@@ -557,6 +557,9 @@ sections:
       - question: Which ports are supported for TLS/TCP listeners?
         answer: The same list of [allowed port range and exceptions](application-gateway-components.md#ports) apply for the Layer 4 proxy too.
 
+      - question: How can I use the same port number for Public and Private TLS/TCP proxy listeners?
+        answer: The use of a common port for TLS/TCP listeners is currently not supported.
+
   - name: Configuration - ingress controller for AKS
     questions:
       - question: What is an ingress controller?