Which task is performed by the Controller?

Question

Options

• AChecking the health of the back-end Pool Members
• BInserting Persistence Cookie into the data stream
• CIndexing the client logs
• DDetermining which Service Engine processes a transaction in active/active scale-out mode

• A
  8% (4)
• B
  2% (1)
• C
  4% (2)
• D
  87% (45)

Explanation

In platforms like Avi Networks (VMware NSX Advanced Load Balancer), the Controller operates as the control plane, making orchestration and scheduling decisions - not handling data-plane traffic directly. Determining which Service Engine (SE) handles a specific transaction in active/active scale-out mode is precisely a control-plane decision, making D correct.

Why the distractors are wrong:

• A (Health checking Pool Members) is a Service Engine function - the SE sits in the data path and performs health monitoring of back-end servers.
• B (Inserting Persistence Cookies) is also a Service Engine task - cookie insertion happens in the live data stream, which the Controller never touches.
• C (Indexing client logs) is neither a Controller nor SE core function; log indexing/analytics is handled by a separate analytics component or external system.

Memory tip: Think of the Controller as the traffic cop dispatcher - it decides who handles the call (which SE), but it never picks up the phone itself. Anything touching actual packet/session data belongs to the Service Engine.

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