AZ-104 Implement and Manage Virtual Networking Practice Question
A VM named VM1 cannot establish TCP 1433 connectivity to VM2. The administrator wants to test the exact flow, confirm whether an NSG allows or denies it, and identify the rule that applies if the flow is blocked. Which Network Watcher tool should be used?
⚠ Common exam trap
A common mix-up: candidates confuse 'Connection troubleshoot' (which tests end-to-end connectivity and can indicate a block) with 'IP flow verify' (which explicitly identifies the exact NSG rule name that caused the denial), leading them to choose the less precise tool.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
IP flow verify, because it evaluates the 5-tuple and reports the matching allow or deny rule.
IP flow verify is the correct tool because it evaluates the 5-tuple (source IP, destination IP, source port, destination port, and protocol) against the effective Network Security Group (NSG) rules for a given virtual machine network interface. It explicitly reports whether the traffic is allowed or denied and, if denied, identifies the exact NSG rule (name and priority) that caused the denial. This directly meets the administrator's requirement to test the exact flow and identify the blocking rule.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Effective routes, because it shows the exact NSG rule name for blocked traffic.
Why it's wrong here
Effective routes returns the actual routing table applied to a virtual network interface, listing the next hop for each destination prefix according to system routes, user-defined routes, and BGP. It contains no representation of NSG rule evaluation, so even if traffic is blocked, the tool cannot display the specific security rule name or whether port 1433 is allowed or denied.
When this WOULD be correct
When the question asks to verify the next hop or the route taken by traffic from a VM to a destination, such as checking if traffic goes through a virtual appliance or is routed to the internet.
- ✓
IP flow verify, because it evaluates the 5-tuple and reports the matching allow or deny rule.
Why this is correct
IP flow verify is designed to test a specific source, destination, protocol, and port combination against NSG rules. It returns whether the flow is allowed or denied and identifies the rule that matched, which makes it the right tool when you need to prove whether TCP 1433 is blocked and why.
- ✗
Packet capture, because it automatically tells you which NSG rule denied the traffic.
Why it's wrong here
Packet capture records raw network traffic into .cap or .pcap files at the source and destination, but it performs no policy analysis and cannot automatically map a dropped packet to a specific NSG rule name. To identify blocking you would have to manually decode the trace, correlate sequence numbers, and infer whether an NSG denied the flow—a step IP flow verify accomplishes instantly.
When this WOULD be correct
When the question asks to capture and analyze the actual network packets between two VMs to diagnose a connectivity issue, such as verifying if packets are being dropped or inspecting application-level data.
- ✗
Connection troubleshoot, because it only checks DNS name resolution.
Why it's wrong here
While Connection Troubleshoot in Network Watcher can initiate a TCP probe to a target port and report whether the path is reachable, it does not directly list the NSG rule that permitted or denied the packet. The tool provides a high-level connectivity status and suggests possible causes, but for a precise rule-level verdict you still need IP flow verify to evaluate the exact 5-tuple against the NSG.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓IP flow verify, because it evaluates the 5-tuple and reports the matching allow or deny rule.Correct answer▾
Why this is correct
IP flow verify is designed to test a specific source, destination, protocol, and port combination against NSG rules. It returns whether the flow is allowed or denied and identifies the rule that matched, which makes it the right tool when you need to prove whether TCP 1433 is blocked and why.
✗Effective routes, because it shows the exact NSG rule name for blocked traffic.Wrong answer — click to see why▾
Why this is wrong here
Effective routes show the effective route table for a VM, not NSG rules. They cannot identify the specific NSG rule that allows or denies traffic based on a 5-tuple.
★ When this WOULD be the correct answer
When the question asks to verify the next hop or the route taken by traffic from a VM to a destination, such as checking if traffic goes through a virtual appliance or is routed to the internet.
Why candidates choose this
Candidates may confuse 'effective routes' with 'effective security rules' or think that route tables include NSG information, leading them to believe it can show NSG rule names.
✗Packet capture, because it automatically tells you which NSG rule denied the traffic.Wrong answer — click to see why▾
Why this is wrong here
Packet capture does not automatically identify which NSG rule denied traffic; it only captures raw network packets, requiring manual analysis to infer blocking.
★ When this WOULD be the correct answer
When the question asks to capture and analyze the actual network packets between two VMs to diagnose a connectivity issue, such as verifying if packets are being dropped or inspecting application-level data.
Why candidates choose this
Candidates may think packet capture provides direct insight into NSG decisions because it captures all traffic, but it lacks the rule-level evaluation that IP flow verify offers.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
Azure Virtual Machine Deployment
Key term
Network Security Group
A Network Security Group is a set of rules that controls inbound and outbound traffic to Azure resources like virtual machines and subnets.
Key term
Security
Security in IT is the practice of protecting systems, networks, and data from unauthorized access, damage, or theft.
About these practice questions
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Same concept, more angles
2 more ways this is tested on AZ-104
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A VM in a subnet cannot connect to another VM on TCP 1433. The administrator wants to confirm whether an NSG rule is blocking the flow and which rule is responsible. Which Network Watcher feature should be used?
medium- A.Connection troubleshoot
- ✓ B.IP flow verify
- C.Packet capture
- D.Effective routes
Why B: B is correct because IP flow verify is the Network Watcher feature specifically designed to test whether traffic is allowed or denied to or from a virtual machine. It checks the security rules (NSG and ASG) and returns which rule is blocking the flow, including the direction and priority. For a TCP 1433 connection failure, this tool directly identifies the blocking NSG rule.
Variation 2. A VM cannot connect to another VM on TCP 1433. You need to determine whether an NSG is blocking the flow and identify which rule applies. Which Network Watcher tool should you use?
medium- A.Packet capture
- ✓ B.IP flow verify
- C.Connection troubleshoot
- D.Effective routes
Why B: IP flow verify is the correct Network Watcher tool because it tests whether a packet is allowed or denied to or from a specific VM, based on a 5-tuple (source IP, destination IP, protocol, source port, destination port). For TCP 1433 (SQL Server), you can specify the exact flow parameters, and IP flow verify will evaluate all effective security rules, including NSG rules, and return the specific rule that allowed or denied the traffic.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.