Disaster Recovery Flashcards
(23 cards)
What is Disaster Recovery?
Enables software, data, or hardware recovery to resume performance of critical business functions after a disaster
Disaster recovery plans are essential for minimizing downtime and maintaining business continuity during unforeseen events.
Why is High Availability important?
Ensures continuous operations with minimal downtime for end users
High availability is crucial for maintaining user satisfaction and operational efficiency.
What is Network Redundancy?
Ensures networks remain up and running at all times, increasing availability
Network redundancy can involve using multiple NICs, switches, and routers to prevent single points of failure.
What is the Active-Active Approach in High Availability?
Multiple systems run simultaneously and share the load
This approach maximizes resource utilization and ensures service availability even if some systems fail.
What is the Active-Passive Approach in High Availability?
Standby systems remain idle until the primary system fails
This provides a reliable fallback mechanism when the primary system is not operational.
What do Load Balancers do?
Distribute network traffic across multiple servers
* Ensure no single server bears too much load
* Continuously monitor server health and reroute traffic away from failed nodes
Load balancers are critical for optimizing resource use and improving application responsiveness.
What is a Content Delivery Network (CDN)?
Network of geographically distributed servers to deliver content more efficiently and reliably
CDNs help reduce latency and improve user experience by caching content closer to end users.
What should be considered when designing redundant networks?
Deciding where and how to use redundancy in the network
Proper planning is essential to ensure robustness and minimize downtime.
What are the cost considerations in redundancy options?
Different redundancy options have varying costs
Decisions about redundancy impact the overall network cost and budget.
What is the difference between TCP and UDP regarding redundancy?
TCP provides additional redundancy by resending packets, while UDP does not
The choice of protocol can significantly affect the network’s reliability and performance.
What is Mean Time To Repair (MTTR)?
Average time to repair a network device after failure
MTTR is a critical metric for assessing the efficiency of maintenance and repair processes.
What is Recovery Time Objective (RTO)?
Time taken to resume normal business operations
RTO helps organizations define acceptable downtime and plan recovery strategies accordingly.
What is Recovery Point Objective (RPO)?
Longest tolerable period of data loss
RPO determines the frequency of data backups to meet organizational data loss tolerance.
What are Hot Sites?
Up and running continuously, ready for immediate switch over
* Requires duplicate equipment and constant data mirroring
* Expensive
Hot sites provide the quickest recovery option but come with high costs.
What are Warm Sites?
Not fully equipped like hot sites, can be up and running in a few days
* Have basic facilities but may need additional equipment
* Cheaper than hot sites
Warm sites offer a balance between cost and recovery time.
What are Cold Sites?
Cheaper than hot and warm sites but adds more time to recovery
* Contains fewer facilities, may be just an empty building
Cold sites are the least expensive option but require significant time to become operational.
What are Mobile Sites?
Can be hot, warm, or cold sites, depending on configuration
* Use portable units like trailers or tents for recovery
Mobile sites provide flexibility and can adapt to various recovery needs.
What are Virtual Sites?
Provide rapid deployment and full functionality for users
* Represent a modern approach to redundant site strategies using cloud-based environments
Virtual sites offer scalability and cost-effectiveness, making them an appealing option for organizations.
What is Platform Diversity?
Diversifying operating systems, networking equipment, and cloud platform providers reduces the risk of a single point of failure
This enhances resilience and adaptability in the face of unexpected disruptions.
What are Tabletop Exercises (TTX)?
Use an incident scenario against a framework of controls to discuss simulated emergency situations
TTX are useful for theoretical training but may lack practical evidence.
What is the role of Red Teams?
Hostile or attacking teams in penetration tests or incident response exercises
Red teams simulate attacks to evaluate the effectiveness of security measures.
What is the role of Blue Teams?
Defensive teams in penetration tests or incident response exercises
Blue teams work to protect systems and respond to attacks during testing.
What do White Teams do?
Includes system administrators, network defenders, and cybersecurity analysts
* Administer, evaluate, and supervise penetration tests or incident response exercises
White teams ensure that exercises are conducted fairly and report on the outcomes.
