Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
A company has a virtual network with a subnet hosting Azure VMs. They want to restrict all inbound traffic to only allow HTTPS (port 443) from the internet, but also allow SSH (port 22) only from a specific management IP address range (e.g., 203.0.113.0/24). Which Azure service should they use to achieve this filtering?
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
Distractor review
Azure Firewall
Azure Firewall is a stateful, cloud-native firewall that can inspect and filter traffic, but it is unnecessary for the stated requirement and more expensive for simple subnet-level port filtering. NSGs are the simpler, appropriate solution.
B
Best answer
Network Security Group (NSG) rule
NSG rules can be configured to allow inbound HTTPS (443) from any source and SSH (22) from the specific management IP range. NSGs provide basic stateful packet filtering at the subnet or NIC level.
C
Distractor review
Azure DDoS Protection
Azure DDoS Protection protects against distributed denial-of-service attacks but does not filter traffic based on ports or source IP addresses.
D
Distractor review
Azure Bastion
Azure Bastion provides secure RDP/SSH connectivity to VMs without public IPs, but it does not filter inbound internet traffic to the subnet.
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
Related AZ-500 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
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 DevOps team wants Defender for Cloud to identify secrets exposed in GitHub repositories. What should be configured?
Question 2
A public web application should be protected from OWASP-style attacks and network-layer DDoS attacks. Which two Azure services are most relevant?
Question 3
A Sentinel scheduled rule runs every 5 minutes and looks back 1 hour. Analysts see repeated alerts for the same event. Which change best prevents duplicate detections without missing late-arriving logs?
Question 4
A SOC analyst needs a Sentinel query that detects multiple failed sign-ins followed by a successful sign-in for the same user. Which table is the best primary source?
Question 5
A Sentinel watchlist contains high-value administrator accounts. Which KQL pattern best uses it in a detection rule?
Question 6
A SOC wants a Sentinel rule to include account, host, and IP entities so analysts can pivot during investigation. What should be configured in the analytics rule?
FAQ
Questions learners often ask
What does this AZ-500 question test?
CIDR notation defines the prefix length.
What is the correct answer to this question?
The correct answer is: Network Security Group (NSG) rule — Network Security Groups (NSGs) can be applied to a subnet or VM NIC to filter inbound and outbound traffic based on source IP, destination port, and protocol. This allows allowing HTTPS from any source and SSH from a specific IP range. Azure Firewall is more advanced but adds cost and complexity for simple subnet-level filtering. DDoS Protection only mitigates volumetric attacks. Azure Bastion provides secure RDP/SSH access without exposing public IPs but does not filter traffic.
What should I do if I get this AZ-500 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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