37 terms

Chapter 9 Review

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Terms in this set (...)

Single point of failure
Any component that can cause the entire system to fail if it fails.
RAID
Disk subsystem that provides fault tolerance and increases availability.
RAID-1
Mirroring. Uses two disks.
RAID-5
Uses three or more disks and can survive the failure of one disk.
RAID-6
Uses four or more disks and can survive the failure of two disks.
Server redundancy
Includes failover clusters and load balancing.
Failover clusters
Remove a server as a single point of failure. If one node in a cluster fails, another node can take over.
Load balancing
Spreads the processing load over multiple servers to ensure availability when the processing load increases.
Load balancing
Used by many web-based applications for higher availability.
Uninterrupted power supply (UPS)
Provides fault tolerance for power fluctuations and provides short-term power for systems during power outages.
Generators
Provide long-term power for systems during extended power outages.
Full backup strategy
Alone allows the quirkiest recovery time.
Full/incremental backup strategy
Minimizes the amount of time needed to perform daily backups.
Test restores
Verify the integrity of backups.
Backups
Should be labeled to identify the contents and copies should be kept off-site.
Business Impact Analysis (BIA)
Part of a business continuity plan (BCP) and it identifies systems and components that are essential to the organization's success.
Business Impact Analysis (BIA)
Identifies maximum down times for systems and components, various scenarios that can affect these systems and components, and the potential loss from an incident.
Recovery Time Objective (RTO)
Identifies the maximum amount of time it should take to restore a system after an outage.
Recovery Point Objective (RPO)
Refers to the amount of data you can afford to lose.
Continuity of Operations Planning (COOP) sites
Provides alternate locations for business functions after a major disaster.
Hot site
Includes everything you need to be operational within 60 minutes.
Hot site
The most effective recovery solution and the most expensive.
Cold site
Has power and connectivity requirements and little else.
Cold site
The least expensive to maintain.
Warm sites
A compromise between hot sites and cold sites.
Mobile sites
Do not have dedicated locations, but can provide temporary support during a disaster.
Disaster Recovery Plan (DRP)
Part of an overall business continuity plan (BCP) and includes the steps to return one or more systems to full operation.
Succession Planning
Ensures that an organization can continue to operate even if key leaders are unavailable.
Succession Planning
Includes charts to identify roles and responsibilities to follow during a disaster, along with a clear chain of command.
Tabletop exercises
Discussion-based only.
Functional exercises
Hands-on exercises.
Heating, ventilation, and air conditioning (HVAC) system
Controls airflow for data centers and server rooms.
HVAC temperature controls
Protect systems from damage due to overheating.
HVAC humidity controls
Protect against electrostatics discharge (ESD) damage by ensuring humid isn't too low.
HVAC humidity control
Protects against water damage from condensation by keeping humidity from getting too high.
Mean time between failures (MTBF)
You can increase the _________ times and overall availability by keeping server rooms at a lower operating temperature.
EMI shielding
Prevents problems from EMI sources, such as fluorescent lighting fixtures, and also prevents data loss in twisted-pair cables.