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201 · Question #100

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…

The correct answer is B. The pool member would be marked online (green). If a pool member responds to a default HTTP GET request, even with an unexpected or error status, the default HTTP monitor will mark it online, as long as a response is received.

Section 2: Configure Load Balancing Features

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.

How the community answered

(23 responses)
  • B
    91% (21)
  • C
    4% (1)
  • D
    4% (1)

Why each option

If a pool member responds to a default HTTP GET request, even with an unexpected or error status, the default HTTP monitor will mark it online, as long as a response is received.

AThe pool member would be marked offline (red).

The pool member would only be marked offline (red) if the monitor failed to establish a TCP connection or did not receive any HTTP response within the timeout period.

BThe pool member would be marked online (green).Correct

The default HTTP monitor simply checks if a TCP connection can be established and if any HTTP response is received (e.g., 200 OK, 404 Not Found, 500 Internal Server Error). As long as a response is received, indicating the server is alive and responding on the HTTP port, the monitor will mark the pool member as online (green).

CThe pool member would be marked unknown (blue).

A pool member is marked unknown (blue) typically when no monitor is assigned or when the system is in the process of starting up and hasn't yet received a monitor result.

DThe pool member would alternate between red and green.

The pool member would not alternate between red and green unless its status was fluctuating due to intermittent issues or monitor failures/successes, which is not implied by a single unexpected response.

Concept tested: F5 BIG-IP default HTTP monitor behavior

Source: https://techdocs.f5.com/en-us/bigip-15-0-0/big-ip-system-modules-and-features/configuring-http-monitors.html

Topics

#HTTP monitor#Pool member status#Health check#Load balancing

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