Fault Tolerance (College Board AP® Computer Science Principles): Flashcards
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- FrontFault Tolerance
Define fault tolerance.
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Cards in this collection (10)
Define fault tolerance.
Fault tolerance is the ability of a system to continue functioning even when one or more of its components fail.
Why does fault tolerance matter in complex systems?
Elements of complex systems fail at unexpected times, often in groups.
How does fault tolerance benefit the users of a network?
Fault tolerance allows users to continue to use the network even when failures occur.
For what two things was the Internet engineered with fault-tolerant abstractions?
The Internet was engineered with abstractions for routing and transmitting data.
Define redundancy.
Redundancy is the inclusion of extra components that can be used to mitigate failure of a system if other components fail.
How is redundancy usually accomplished on the Internet?
Redundancy is accomplished by having more than one path between any two connected devices.
What does the redundancy of routing options increase?
Redundant routing options increase the reliability of the Internet.
Redundancy helps the Internet scale to more devices and more people, because multiple paths can share the ____.
Redundancy helps the Internet scale to more devices and more people, because multiple paths can share the load.
What is the main cost of redundancy in a system?
Redundancy often requires additional resources, such as more hardware or more connections.
True or False?
The failure of a single connection on the Internet always stops two devices from communicating.
False.
If a device or connection fails, subsequent data is sent via a different route, if possible.
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