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400-007 · Question #75
400-007 Question #75: Real Exam Question with Answer & Explanation
The correct answer is A: A failure of a single element causes the entire service to fail. Fate-sharing in network design describes a dependency condition where a single component failure causes all co-dependent services or elements to fail together as a unit.
Question
Which option is a fate-sharing characteristic in regards to network design?
Options
- AA failure of a single element causes the entire service to fail
- BIt protects the network against failures in the distribution layer
- CIt acts as a stateful forwarding device
- DIt provides data sequencing and acknowledgment mechanisms
Explanation
Fate-sharing in network design describes a dependency condition where a single component failure causes all co-dependent services or elements to fail together as a unit.
Common mistakes.
- B. Protection against distribution layer failures describes redundancy and resilience techniques such as dual-homing or fast reroute, which are design responses to fate-sharing risks, not the definition of fate-sharing itself.
- C. A stateful forwarding device maintains session or flow state such as NAT bindings or firewall sessions - this describes a forwarding plane characteristic and is unrelated to the fate-sharing concept.
- D. Data sequencing and acknowledgment mechanisms are transport layer functions associated with TCP's reliable delivery service, not a network architectural fate-sharing characteristic.
Concept tested. Fate-sharing as a network high-availability design principle
Reference. https://www.rfc-editor.org/rfc/rfc3439
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