Minimize Health Probe Traffic in Azure Front Door
You have an Azure Front Door instance named FD that contains an origin group named OG1. You need to configure a health probe for OG1. The solution must minimize the amount of traffic generated by the health probe. Which HTTP method should you use?
Community Votes
100% of anonymous learners picked answer B. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
This question tests Azure Front Door health probe configuration, specifically identifying that the HEAD method minimizes traffic by omitting the response body.
Configuring a health probe for an Azure Front Door origin group requires selecting an HTTP method that minimizes network traffic. The HEAD method is the correct choice because it retrieves only the response headers without the message body.
Choosing GET is the most common mistake because it is a standard HTTP method for retrieving data, but it unnecessarily downloads the full message body, generating excess health probe traffic.
Community Discussion (3 comments)
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Expert Analysis
Why the Answer Is Correct
The HEAD method is identical to GET except that the server must not return a message-body in the response. When configuring a health probe, the objective is simply to verify that the origin is available and responsive, which can be determined solely from the HTTP status code and headers. By using HEAD, Azure Front Door minimizes the bandwidth and traffic generated by continuous health checks, making it the correct choice for this requirement.Why the Other Options Are Wrong
The GET method retrieves the full message body, which generates significantly more traffic than necessary for a health probe. The CONNECT method is used to establish a tunnel to the server, typically for SSL/TLS communication via a proxy, and is not used for health probes. The TRACE method is used for diagnostic purposes to loop back the request message, is not supported for Front Door health probes, and does not minimize traffic.Community Comment Notes
Commenters agree that the HEAD method is correct because it avoids downloading the message body. As Stevo3 noted, the HEAD method "is identical to GET except that the server MUST NOT return a message-body in the response." xRiot007 also pointed out that "We do not care about what is retrieved, only about the server response," which perfectly captures why HEAD is sufficient.Official Reference
Exam Strategy
When asked to minimize health probe traffic, always select the HEAD method over GET, as it retrieves only headers and not the payload. Remember that HEAD is also the default probe method for new Azure Front Door profiles.
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