azure appservice or function app advance tool using nameresolver and tcpping

When you're using appservice and function app, it is recommended to use nameresolver and tcpping when resolving connectivity issues.

Tools like nslookup and curl is available but could be misleading and you can't tell the difference whether it worked or not. 

https://learn.microsoft.com/en-us/troubleshoot/azure/app-service/troubleshoot-vnet-integration-apps


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