20 Questions
What is the purpose of having two failure domains in a system?
To limit the blast radius of system changes
How can geographically separated failure domains benefit a system?
They provide isolation for natural disasters
What is the purpose of a breakglass mechanism in system operations?
To bypass policies during outages for quick resolution
Why should systems using ACLs fail closed?
To provide secure access with explicit permissions
How does combining data and functional isolation enhance system resilience?
By delaying incident propagation to functional units
What can lead to system overload according to the text?
A sudden spike in incoming requests
How can a storage shortage potentially lead to system failure?
By increasing software failures
What does the text suggest should be planned in advance to prevent system breakdown?
Weaknesses in the system
How can a system protect itself from collapsing chaotically during dire circumstances?
Selecting which properties to disable or adjust
What is the benefit of deliberately designing multiple response options for system failures?
Utilizing controlled breakpoints instead of chaotic collapse
What is the main purpose of creating failure domains in a system?
To achieve functional isolation
How do failure domains differ from managing role, location, and time separations?
Failure domains involve partitioning the system into completely independent copies
What is the effect of failure domains on system resilience?
They increase system resilience
Why is it important to mitigate failures of critical components in a system?
To prevent complete system failure
Which approach is recommended to reduce the probability of a single root cause affecting elements in multiple failure domains?
Breaking up systems into independent failure domains
What is the purpose of periodically refreshing the phone number list from the remote service?
To ensure the emergency phone numbers are up to date and accurate
Why might a hidden landline with dialing capabilities be utilized as a backup to a disabled wireless connection?
To provide an alternative communication method in case of a wireless failure
Why is building an alternative network that avoids reusing components from the main network considered essential?
To ensure simplicity and understandability in network design
What is the primary goal behind limiting available features and bandwidth in the alternative network mentioned?
Support only critical features during a network outage
Why are large networks more susceptible to global outages compared to smaller networks?
Due to the dynamic management and complexity involved
Learn about a local server that responds to emergency phone number lookup requests and periodically refreshes the phone number list from a remote service. Explore the functionalities of a home security console, including writing logs, accessing emergency numbers, and utilizing a hidden landline for backup dialing.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
