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

The building switch block approach is a network design feature that effectively limits the size of a failure domain by physically and logically segmenting the network into smaller, manageable blocks. This design creates distinct sections of the network that can operate independently from one another. If a failure occurs within one block—such as a switch or device in that block—only that block is affected, while the rest of the network continues to function normally. This is crucial in enterprise networks where maintaining uptime and reliability is essential.

By utilizing this approach, network architects can enhance fault isolation, improve performance, and enable easier troubleshooting. The structured layout allows for organized growth and scalability while limiting the impact of localized failures. This contrasts with other options, which, while beneficial to network performance and redundancy, do not specifically address the concept of minimizing the failure domain size in the same direct manner as the building switch block design does.