AZ-104 Question 234
Single answerYou are an Azure Administrator for a company that hosts multiple internal apps on Azure Virtual Machines, all within the same virtual network. You need to configure a solution so that each VM can resolve other VMs by hostname, and also ensure incoming external web requests to these VMs are distributed across all healthy instances. Which configuration should you deploy?
- A
Use Azure Private DNS for internal name resolution and an Azure Load Balancer with a public front-end IP
- B
Edit each VM's host file for name resolution and use Azure Traffic Manager for load balancing
- C
Create an Azure DNS zone for internal name resolution and enable Round Robin DNS
- D
Enable Azure-provided DNS for internal name resolution and set up Application Gateway with WAF
Show answer and explanation
Correct answer: A
Explanation
Combining Azure Private DNS for internal name resolution and Azure Load Balancer for external traffic distribution provides a resilient, scalable approach to ensuring VMs can be addressed by name internally and that incoming requests are efficiently balanced among all healthy instances.
- A. Correct.
Azure Private DNS allows VMs to resolve each other by hostname internally, and Azure Load Balancer can evenly distribute external requests among healthy VMs
- B. Incorrect.
Manually updating host files is not scalable, and Traffic Manager is primarily used for global distribution rather than basic internal load balancing
- C. Incorrect.
Azure DNS zones are typically used for external DNS resolution, and Round Robin DNS alone does not provide the health probe capabilities of Load Balancer
- D. Incorrect.
While Azure-provided DNS can offer basic name resolution, relying on it alone is less flexible, and Application Gateway with WAF may be more complex than needed for simple load balancing in this scenario