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400-007 · Question #55
400-007 Question #55: Real Exam Question with Answer & Explanation
The correct answer is B: fate sharing. Fate sharing means multiple tenants or services share the same failure domain, so a single device failure impacts all co-located services simultaneously, reducing reliability in a multitenant SP edge.
Question
A network architect must redesign a service provider edge, where multiservice and multitenant PEs are currently present. Which design feature should be minimized in the new design to achieve reliability?
Options
- Abridging
- Bfate sharing
- Credundancy
- Dunicast overlay routing
Explanation
Fate sharing means multiple tenants or services share the same failure domain, so a single device failure impacts all co-located services simultaneously, reducing reliability in a multitenant SP edge.
Common mistakes.
- A. Bridging may introduce complexity and broadcast domain issues but is a specific service capability rather than the primary reliability risk in a multitenant PE redesign.
- C. Redundancy is a core reliability mechanism and should be maximized, not minimized, in a service provider edge design.
- D. Unicast overlay routing such as MPLS L3VPN is the foundational technology enabling multitenant separation and scalable PE design and should not be minimized.
Concept tested. Fate sharing minimization in SP edge design
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