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Interview question · Cloud, Container & AI Infrastructure Security

Design private networking and egress for an application that calls hosted model APIs.

Sending prompts to a provider is a data flow like any other. The scored answer keeps it on private paths where possible, forces all model traffic through one controlled exit, and blocks everything else.

mediumNewPreparation tags: Amazon, Microsoft, GoogleUpdated Nov 2026

Sending prompts to a provider is a data flow like any other. The scored answer keeps it on private paths where possible, forces all model traffic through one controlled exit, and blocks everything else.

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What would you say before reading the answer?

  1. 01 State the assumptions your answer depends on.
  2. 02 Explain the mechanism and choose a control.
  3. 03 Name a condition that would change your decision.

The worked answer includes an approach, scoring criteria and follow-up questions. Compare the reasoning with your own.

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What if · the follow-ups in this answer

The answer works through 6 follow-ups like an interviewer would

A company sends sensitive prompts to a hosted LLM API over the public internet from many services, each with its own API key.

  1. How should model traffic be routed?
  2. What should the gateway do?
  3. Why block other outbound traffic?
  4. What about DNS?
  5. Does private connectivity make the provider trusted?
  6. What network design would you propose?

Each rung has a nudge, a model answer, the principle that carries over and the weak answer to avoid. Premium opens every answer and ladder.

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