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hardmultiple choiceObjective-mapped

Users on the internet cannot reach an HTTPS application hosted on VM-Web01. The VM has a public IP address, the application is listening on TCP port 443, and the guest OS firewall allows the traffic. What is the most likely Azure-side cause?

Question 1hardmultiple choice
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Users on the internet cannot reach an HTTPS application hosted on VM-Web01. The VM has a public IP address, the application is listening on TCP port 443, and the guest OS firewall allows the traffic. What is the most likely Azure-side cause?

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Answer choices

Why each option matters

Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.

A

Best answer

The NSG blocks inbound TCP 443

A missing allow rule or an explicit deny rule in the NSG will block internet access to the web application.

B

Distractor review

The VM uses Premium SSD

The storage type does not control inbound HTTPS connectivity.

C

Distractor review

Azure Backup is not enabled

Backup configuration does not affect inbound web traffic.

D

Distractor review

The storage account uses GRS

Storage redundancy is unrelated to this VM connectivity issue.

Common exam trap

Common exam trap: usable hosts are not the same as total addresses

Subnetting questions often tempt you into counting all addresses. In normal IPv4 subnets, the network and broadcast addresses are not usable host addresses.

Technical deep dive

How to think about this question

Subnetting questions test whether you can identify the network, broadcast address, usable range, mask and correct subnet. Slow down enough to calculate the block size correctly.

KKey Concepts to Remember

  • CIDR notation defines the prefix length.
  • Block size helps identify subnet boundaries.
  • Network and broadcast addresses are not usable hosts in normal IPv4 subnets.
  • The required host count determines the smallest suitable subnet.

TExam Day Tips

  • Write the block size before choosing the subnet.
  • Check whether the question asks for hosts, subnets or a specific address range.
  • Do not confuse /24, /25, /26 and /27 host counts.

Related practice questions

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AZ-104 virtual machine practice questions

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More questions from this exam

Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.

Question 1

A route table contains these entries: 10.0.0.0/8 with next hop Virtual appliance, and 10.1.1.0/24 with next hop Virtual network gateway. Which next hop will Azure use for traffic to 10.1.1.5?

Question 2

You are deploying a stateless web application on Azure virtual machines. The solution must automatically add and remove instances based on CPU demand and allow all instances to be managed as one logical group. Which Azure compute feature should you deploy?

Question 3

You are deploying a Windows Server VM for an internal app. The VM must support Secure Boot and vTPM later, its OS disk must survive host moves, and the team wants the lowest-cost managed disk tier that still behaves like a normal writable OS disk. Which two choices should you make? Select two.

Question 4

You need to deploy several identical virtual machines and ensure that the failure of a single Azure host does not affect all of them. Which feature should you use?

Question 5

You need to connect VNet-Hub and VNet-Spoke so that resources in both virtual networks can communicate privately over the Microsoft backbone. Both virtual networks are in the same region. What should you configure?

Question 6

You need to create a storage account that provides the lowest-cost redundant storage for non-critical data and only needs protection against local disk or server failure within a single datacenter. Which redundancy option should you choose?

FAQ

Questions learners often ask

What does this AZ-104 question test?

CIDR notation defines the prefix length.

What is the correct answer to this question?

The correct answer is: The NSG blocks inbound TCP 443 — When the application and guest firewall are configured correctly, the most likely Azure-side issue is that the network security group does not allow inbound TCP 443 to the VM or subnet.

What should I do if I get this AZ-104 question wrong?

Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.

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