Resiliency

Question 1

Resiliency

Answer 1

Resiliency → ability of systems and infrastructure to withstand failures, attacks, or outages and continue operating or recover quickly with minimal impact to availability.

Question 2

HA

Answer 2

High availability (HA) → design approach focused on keeping systems online and accessible at all times by minimizing downtime through failover mechanisms and continuous operation.

Question 3

Redundancy

Answer 3

Redundancy → use of duplicate components or systems to eliminate single points of failure, including redundant disks, power, or network paths; common redundant array of independent disks levels include RAID 0 for striping, RAID 1 for mirroring, RAID 5 for striping with parity, RAID 6 for dual parity, and RAID 10 for mirrored striping.

Question 4

Server Clustering

Answer 4

Server clustering → resiliency technique that combines two or more servers to operate as a single system, allowing workloads to fail over automatically if one server goes down.

Question 5

Load Balancing

Answer 5

Load balancing → traffic distribution method that spreads requests across multiple independent servers to improve availability and performance, even though the servers do not coordinate or share state.

Question 6

Hot Site

Answer 6

Hot site → fully operational backup location with up-to-date systems and data that can take over immediately after a primary site failure.

Question 7

Cold Site

Answer 7

Cold site → backup location with minimal infrastructure that requires significant setup time before becoming operational after a disaster.

Question 8

Warm Site

Answer 8

Warm site → partially prepared backup location with some systems and data in place, requiring less setup time than a cold site but more than a hot site.

Question 9

COOP

Answer 9

Continuity of operations planning (COOP) → organizational planning process that ensures essential functions continue during and after a disruption, focusing on people, processes, and technology.