Chapter 24. A Unified Security Perimeter: The Importance of Defense in Depth

When we were young teenagers, we were fearless. We drove our cars too fast, didn't wear seatbelts; it is amazing we are alive today. Now that we are older, we still drive fast, but we do it in very sophisticated vehicles. We wear seatbelts, our cars have front and side airbags, antilock breaks, and skid management, we pay insurance, and as we age, we eat vitamin A to improve our night vision and we wear special driving glasses. We apply a defense-in-depth approach to driving. What's the difference? Nowadays, with a spouse and kids counting on us, we have something to lose.

Could it be that in our journey as system and network builders a similar thing has happened? Just ...

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