Security Controls for Availability
CIA Triad Availability: A system or software should be designed and implemented to recover from disruptions in a secure and quick manner to avoid negative impacts to productivity and business continuity.
3 slides · 1 min read · Domain 7
There are several concepts that can be used to achieve availability.
Redundancy
Continuing the running of an organization even with the absence/failure of one important component. Redundancy in Database Management System (DBMS) means copying data within a database or using a separate data storage technology in two separate places.
Fault Tolerance
The system remains working as expected even when some of its components are failing.
Failover
Switching to a redundant or standby computer server, system, hardware component, or network upon the failure or abnormal termination of the previously active application, server, system, hardware component, or network.
RAID
A redundant array of independent disks
(RAID) is a data storage virtualization technology that combines multiple physical disk-drive components into a single logical unit for the purposes of data redundancy, performance improvement, or both.
Fault Tolerance
The system remains working as expected even when some of its components are failing.
High-Availability Clusters (Failover Clusters)
These are groups of computers that support server applications that can be reliably utilized with a minimum of downtime. They operate by using high-availability software to harness redundant computers in groups or clusters that provide continued service when system components fail.
RAID
A redundant array of independent disks (RAID) is a data storage virtualization technology that combines multiple physical disk-drive components into a single logical unit for the purposes of data redundancy, performance improvement, or both.
Replication
This is the process of storing data in more than one site or node. As an example, directory services replication is often used to prevent the loss of a single server that would otherwise cause the directory service to become unavailable.