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101 · Question #216

Which statement describes a typical purpose of iRules.

The correct answer is A. iRules can be used to add individual control characters to an HTTP data stream.. iRules provide low-level scripting access to the traffic data stream, including the ability to insert or modify individual characters within an HTTP payload.

Section 2: F5 Solutions and Technology

Question

Which statement describes a typical purpose of iRules.

Options

  • AiRules can be used to add individual control characters to an HTTP data stream.
  • BiRules can be used to update the timers on monitors as a server load changes.
  • CiRules can examine a server response and remove it from a pool if the response is unexpected
  • DiRules can be used to look at client requests and server responses to choose a pool member to

How the community answered

(39 responses)
  • A
    87% (34)
  • B
    8% (3)
  • C
    3% (1)
  • D
    3% (1)

Why each option

iRules provide low-level scripting access to the traffic data stream, including the ability to insert or modify individual characters within an HTTP payload.

AiRules can be used to add individual control characters to an HTTP data stream.Correct

iRules are TCL-based scripts that expose HTTP payload manipulation commands, giving administrators fine-grained control over the data stream at the character level. This capability allows iRules to insert, replace, or remove arbitrary content - including control characters - in HTTP requests and responses as they pass through the BIG-IP. This reflects the scripting engine's design as a highly granular traffic manipulation tool.

BiRules can be used to update the timers on monitors as a server load changes.

iRules cannot modify health monitor configuration such as interval or timeout values at runtime; those parameters are static settings defined directly on the monitor object.

CiRules can examine a server response and remove it from a pool if the response is unexpected

Disabling or removing a pool member based on unexpected server responses is the function of health monitors, not iRules; iRules do not have authority to permanently alter pool membership.

DiRules can be used to look at client requests and server responses to choose a pool member to

The choice is truncated and incomplete as presented, making it unevaluable as a definitive statement about iRules behavior.

Concept tested: F5 iRules granular HTTP data stream character-level manipulation

Source: https://clouddocs.f5.com/api/irules/

Topics

#iRules#HTTP data stream#traffic management#pool selection

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