101 · Question #481

101 Question #481: Real Exam Question with Answer & Explanation

The correct answer is A: from server-side interface in ADC.. Because the client-to-Virtual-Server connection succeeds, the fault is isolated to the server-side path, so testing from the ADC's server-side interface directly reveals whether the backend web server is reachable and responding.

Question

A BIG IP administrator is testing a web server behind ADC. The connection to a Virtual Server is successful but the page is still not loading. Where should the administrator test to determine if the server is available?

Options

Afrom server-side interface in ADC.
Bfrom client side interface in ADC
Cfrom Workstation client
Dfrom switch connected to ADC and Server

Explanation

Because the client-to-Virtual-Server connection succeeds, the fault is isolated to the server-side path, so testing from the ADC's server-side interface directly reveals whether the backend web server is reachable and responding.

Common mistakes.

B. Testing from the client-side interface repeats the already-confirmed working path between the client and the Virtual Server and will not expose a server-side connectivity or application issue.
C. Testing from the client workstation traverses the same successful path to the Virtual Server and cannot distinguish whether the problem is in the ADC-to-server segment.
D. Testing from the switch only verifies Layer 2/3 physical connectivity and cannot confirm whether the server application is running or returning correct HTTP responses.

Concept tested. BIG-IP server-side connectivity troubleshooting

Reference. https://support.f5.com/csp/article/K13000

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