Network Defense Essentials (NDE) Practice Exam

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What is the main purpose of using RAID Level 1?

To speed up data retrieval
To ensure data redundancy
To improve system performance
To lower costs

The correct answer is: To ensure data redundancy

The primary purpose of using RAID Level 1 is to ensure data redundancy. In a RAID Level 1 configuration, data is mirrored across two or more drives. This means that each piece of data is duplicated, leading to a situation where if one drive fails, the data remains accessible on another drive. This mirroring process not only protects against data loss but also allows for continuous system availability, making it a critical choice for environments where data integrity is paramount. While RAID Level 1 can offer some performance benefits due to simultaneous read operations from multiple drives, its main design focus is rooted in redundancy rather than speed. Similarly, while improving system performance and lowering costs might be considerations in broader RAID strategies, RAID Level 1 primarily prioritizes the protection of data through duplication. Thus, redundancy stands out as the defining characteristic of RAID Level 1.