The answer is Azure Service Bus Topics and Azure Event Grid. Both services implement the pub/sub messaging pattern by allowing a single message source to broadcast to multiple independent receivers through subscriptions or event handlers. Service Bus Topics use named subscriptions with filters and rules for ordered, transactional message delivery, while Event Grid uses event subscriptions for reactive, high-throughput event distribution. On the AZ-204 exam, this distinction tests your understanding of messaging patterns versus event-driven architectures, with a common trap being Azure Queue Storage—it only supports point-to-point communication, not pub/sub. Remember the memory tip: “Topics and Grid, subscriptions are the key; queues are just you and me.”
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
Which TWO services can be used to implement a pub/sub messaging pattern in Azure? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Service Bus topics
Options A and D are correct. Azure Service Bus topics support pub/sub with multiple subscriptions. Azure Event Grid also supports pub/sub with multiple subscribers. Option B is wrong because Azure Queue Storage is a point-to-point queue, not pub/sub. Option C is wrong because Azure Data Lake Storage is a storage service. Option E is wrong because Azure Logic Apps is an integration service, not a messaging service.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Azure Logic Apps
Why it's wrong here
Logic Apps is an integration service, not a messaging service.
✓
Azure Service Bus topics
Why this is correct
Service Bus topics support pub/sub with multiple subscriptions.
Related concept
Static NAT maps one inside address to one outside address.
✗
Azure Queue Storage
Why it's wrong here
Queue Storage is point-to-point, not pub/sub.
✓
Azure Event Grid
Why this is correct
Event Grid supports pub/sub with multiple subscribers.
Related concept
Static NAT maps one inside address to one outside address.
✗
Azure Data Lake Storage
Why it's wrong here
Data Lake Storage is a storage service, not a messaging service.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-204 NAT questions on configuration and troubleshooting.
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Azure Service Bus topics — Options A and D are correct. Azure Service Bus topics support pub/sub with multiple subscriptions. Azure Event Grid also supports pub/sub with multiple subscribers. Option B is wrong because Azure Queue Storage is a point-to-point queue, not pub/sub. Option C is wrong because Azure Data Lake Storage is a storage service. Option E is wrong because Azure Logic Apps is an integration service, not a messaging service.
What should I do if I get this AZ-204 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related AZ-204 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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