Microsoft Azure Administrator (legacy) — Question 57

Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
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You have an Azure subscription that contains the following resources:
✑ A virtual network that has a subnet named Subnet1
✑ Two network security groups (NSGs) named NSG-VM1 and NSG-Subnet1
✑ A virtual machine named VM1 that has the required Windows Server configurations to allow Remote Desktop connections
NSG-Subnet1 has the default inbound security rules only.
NSG-VM1 has the default inbound security rules and the following custom inbound security rule:
✑ Priority: 100
✑ Source: Any
✑ Source port range: *
✑ Destination: *
✑ Destination port range: 3389
✑ Protocol: UDP
✑ Action: Allow
VM1 connects to Subnet1. NSG1-VM1 is associated to the network interface of VM1. NSG-Subnet1 is associated to Subnet1.
You need to be able to establish Remote Desktop connections from the internet to VM1.
Solution: You modify the custom rule for NSG-VM1 to use the internet as a source and TCP as a protocol.
Does this meet the goal?

Answer options

Correct answer: A

Explanation

Changing the custom rule for NSG-VM1 to use the internet as a source and TCP as the protocol is correct because Remote Desktop Protocol (RDP) operates over TCP on port 3389. The original configuration allowed UDP, which is not used for RDP, making the change necessary to meet the goal of enabling Remote Desktop connections from the internet.