Microsoft Azure Administrator Associate AZ-104 Practice Question
Users report they cannot access the web application hosted on your Azure virtual machine from the internet, even though it was working previously. The virtual machine is running, and the web server is operational. What should you check first to resolve the connectivity issue?
Verify that the Azure Load Balancer is configured correctly.
Verify if a Network Security Group is blocking inbound traffic to the application.
Ensure that the application has an outbound internet connection.
Check if the private IP address of the server has changed due to a restart.
You should verify if a Network Security Group (NSG) associated with the network interface or subnet is blocking inbound traffic on the required ports. NSGs act as virtual firewalls, and if rules deny inbound traffic to the web server ports, external access will fail. Checking the NSG rules helps identify if any recent changes caused the connectivity issue. The other options are less likely to be the immediate cause: a change in the private IP address does not impact access via the public IP address; an outbound internet connection is not necessary for inbound access; and unless a Load Balancer is in use, its configuration would not affect single virtual machine connectivity.
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Microsoft Azure Administrator Associate AZ-104
Configure and manage virtual networking
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