Which action should be taken when a southbound device is not connecting?

Question

Options

• AVerify the gateway link status.
• BReview the edge application logs.
• CVerify the sensor status.
• DRedeploy the edge application.

• A
  86% (25)
• B
  7% (2)
• C
  3% (1)
• D
  3% (1)

Explanation

Verifying the gateway link status (A) is the correct first step because southbound devices communicate through the gateway - if that link is down, no device below it can connect, regardless of the device's own state. This is the foundational layer to check before investigating anything higher in the stack.

Why the distractors are wrong:

• B (Edge application logs): Logs help debug application-layer behavior, not physical/network connectivity - you'd check these after confirming the link is up.
• C (Sensor status): Jumping straight to the sensor assumes the problem is local to that device; if the gateway link is broken, the sensor may be fine but unreachable.
• D (Redeploy the edge application): This is a drastic, disruptive action with no diagnostic value - redeployment doesn't fix a broken network link.

Memory tip: Think of "southbound" as data flowing south (downward) from controller → gateway → device. When something southbound fails, start at the top of that chain - the gateway link - before inspecting the device at the bottom.

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