Which design feature will limit the size of a failure domain in an enterprise network?

Question:
Which design feature will limit the size of a failure domain in an enterprise network?

• the purchase of enterprise equipment that is designed for large traffic volume
• the installation of redundant power supplies
• the use of a collapsed core design
• the use of the building switch block approach

Explanation: In order to best limit the of a failure domain, routers or multilayer switches can be deployed in pairs. The failure of a single device should not cause the network to go down. Installing redundant power supplies may protect a single device from a power failure, but if that device suffers from another type of problem, a redundant device would have been a better solution. Purchasing enterprise equipment that handles large flows of traffic will not provide extra reliability in times of an outage. If a collapsed core design is used, the core and distribution are collapsed into a single device, increasing the chance of a devastating outage.

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