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The Art of Network Architecture: Business-Driven Design by Denise Donohue, Russ White

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Chapter 8. Weathering Storms

Why isn’t your CEO asking for six 9s of uptime? Because no one in the networking industry press is talking about how six 9s of availability are so much better than five 9s.

Resilience is a big issue in network architecture—so big it’s almost the only thing many businesses are willing to put a lot of money into achieving. How do you build a resilient network? The traditional answer, widely used in almost every other field of architecture, is to overengineer the solution. If the floor needs to be able to handle one person walking across it, design the floor to support four or five people walking across it. If the highest wind a roof might encounter in a storm is 100 miles per hour, then design the roof to handle winds ...

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