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101 · Question #200

101 Question #200: Real Exam Question with Answer & Explanation

The correct answer is B: The pool member would be marked online (green).. The default F5 HTTP monitor has no receive string configured, so any HTTP response from the server - even unexpected content - is treated as a successful health check.

Question

A site would like to ensure that a given web server's default page is being served correctly prior to sending it client traffic. They assigned the A site would like to ensure that a given web server's default page is being served correctly prior to sending it client traffic. They.e assigned the default HTTP monitor to the pool. What would the member status be if it sent an unexpected response to the GET request. default HTTP monitor to the pool. What would the member. status be if it sent an unexpected response to the GET request.

Options

  • AThe pool member would be marked offline (red).
  • BThe pool member would be marked online (green).
  • CThe pool member would be marked unknown (blue).
  • DThe pool member would alternate between red and green.

Explanation

The default F5 HTTP monitor has no receive string configured, so any HTTP response from the server - even unexpected content - is treated as a successful health check.

Common mistakes.

  • A. A pool member would only go offline (red) if a configured receive string is not found in the server's response or if the server fails to respond at all - neither of which applies when using the default monitor with no receive string.
  • C. Unknown (blue) status indicates a monitor has not yet executed or is in an unconfigured/disabled state, not the outcome of receiving an unexpected HTTP response.
  • D. Monitor results are deterministic within each polling interval; the status does not alternate unless the server intermittently passes and fails the health check across separate probe intervals.

Concept tested. F5 BIG-IP default HTTP monitor receive string behavior

Reference. https://techdocs.f5.com/en-us/bigip-15-1-0/big-ip-local-traffic-manager-monitors-reference/http-and-https-monitor-settings.html

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