Question 49

Data mirroring is a strategy used for disaster recovery.

Data mirroring involves creating an exact copy of data in real-time, which ensures data availability and integrity during a disaster recovery situation. This technique is critical for minimizing downtime and protecting against data loss.

A) Parallel processing

Parallel processing refers to the simultaneous execution of multiple processes to increase computational speed and efficiency. While beneficial for performance, it does not directly address disaster recovery strategies and thus is not an effective choice for recovering from disasters.

B) User authentication

User authentication is a security measure that verifies the identity of users attempting to access a system. Although important for overall system security, it does not pertain to the recovery of data or systems following a disaster, making it an incorrect option for this question.

C) Data encryption

Data encryption is a method of securing data by converting it into a coded format that can only be accessed with a decryption key. While encryption protects data from unauthorized access, it does not provide a mechanism for recovery in the event of a disaster, rendering it unsuitable for this context.

D) Data mirroring

Data mirroring is an effective disaster recovery strategy because it involves creating real-time copies of data across different locations. This ensures that if one location experiences a failure, the data can be quickly restored from the mirrored site, thus maintaining business continuity and data integrity.

Conclusion

Data mirroring stands out as the most relevant strategy for disaster recovery due to its ability to provide real-time data redundancy and quick recovery options. In contrast, parallel processing, user authentication, and data encryption, while valuable in their respective areas, do not specifically address the need for data recovery during disasters.