Update application-gateway-faq.md

Author: abshamsft

articles/application-gateway/application-gateway-faq.md

@@ -63,7 +63,9 @@ If you're using a public IP address as an endpoint, you'll find the IP and DNS i
 
 ### What are the settings for Keep-Alive timeout and TCP idle timeout?
 
- In the Application Gateway v1 SKU, the Keep-Alive timeout is 120 seconds. The Keep-Alive timeout for the v2 SKU is 75 seconds. The TCP idle timeout is a 4-minute default on the frontend virtual IP (VIP) of Application Gateway.
+*Keep-Alive timeout* governs how long the Application Gateway will wait for a client to send another HTTP request on a persistent connection before reusing it or closing it. *TCP idle timeout* governs how long a TCP connection is kept open in case of no activity. 
+
+The *Keep-Alive timeout* in the Application Gateway v1 SKU is 120 seconds and in the v2 SKU it's 75 seconds. The *TCP idle timeout* is a 4-minute default on the frontend virtual IP (VIP) of both v1 and v2 SKU of Application Gateway. 
 
 ### Does the IP or DNS name change over the lifetime of the application gateway?