Chapter 08: Resilience and Physical Security

Question 1

What does it mean when building a resilient system with redudancy,

Answer 1

Having more than one of a system, service, device or other components.

Question 2

Name some common design methods for building resilient systems.

Answer 2

• Having geographic dispersal of systems. This will ensure that a single disaster, attach, or failure can’t disable or destroy them.
• Separation of servers and other devices in data centers is also commonly used to avoid a single rack being a point of failure.
• Use of multiple network path solutions to ensure that a severed cable or a failed device will not cause a loss of connectivity.
• Redudant network devices, including multiple routers, security devices like firewalls and IPS’s