101 · Question #48
Which statement is true concerning iRule events.
The correct answer is B. All client traffic has data that could be used to trigger iRule events.. Every client connection generates at least one iRule event (such as CLIENT_ACCEPTED), so all client traffic carries data that can trigger iRule processing.
Question
Which statement is true concerning iRule events.
Options
- AAll iRule events relate to HTTP processes.
- BAll client traffic has data that could be used to trigger iRule events.
- CAll iRule events are appropriate at any point in the clientserver communication.
- DIf an iRule references an event that doesn't occur during the client's communication, the client's
How the community answered
(49 responses)- A8% (4)
- B88% (43)
- C2% (1)
- D2% (1)
Why each option
Every client connection generates at least one iRule event (such as CLIENT_ACCEPTED), so all client traffic carries data that can trigger iRule processing.
iRule events are not limited to HTTP - events such as CLIENT_ACCEPTED, SERVER_CONNECTED, LB_SELECTED, and CLIENTSSL_HANDSHAKE all operate independently of any HTTP processing.
Regardless of application protocol, every client TCP connection triggers low-level events like CLIENT_ACCEPTED and CLIENT_DATA, meaning there is always event-driven data available for iRules to act on. This is true even without HTTP, SSL, or any upper-layer protocol - the TCP connection itself produces triggerable events.
iRule events are context-specific and only valid during their respective communication phase - for example, HTTP_REQUEST cannot fire during connection setup, so events are not universally appropriate at every point.
If an iRule references an event that never occurs during a particular client session, that event handler simply never executes; it does not cause the client connection to fail or be dropped.
Concept tested: F5 iRule event types and client traffic triggers
Source: https://clouddocs.f5.com/api/irules/
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