The organisation must ensure the availability of information systems throughout their entire lifecycle. For this reason, the availability requirements of different information systems (especially the maximum time a system can be out of service, recovery time objective, and recovery point objective) must be met.
The implementation of availability requirements must take into account the load endurance, fault tolerance, and recovery time required from the information system.
Additionally, the need for procedures that protect availability has been identified, and procedures have been implemented with customized protections for critical systems. These protections may include, for example, redundancy of key network connections, hardware, and application execution environments.
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