SK0-005 Exam Dumps : CompTIA Server+ Certification Exam

A backdoor is a security risk that provides unauthorized access to an application. A backdoor is a hidden or undocumented way of bypassing the normal authentication or encryption mechanisms of an application, allowing an attacker to gain remote access, execute commands, or steal data. A backdoor can be created intentionally by the developer, maliciously by an attacker, or unintentionally by a programming error. References: CompTIA Server+ Certification Exam Objectives, Domain 5.0: Security, Objective 5.2: Given a scenario, apply logical access control methods.

The write cache is a feature of some RAID controllers that allows them to temporarily store data in a fast memory buffer before writing it to the disk drives. This improves the performance and efficiency of write operations, especially for random and small writes. However, if the battery on the controller goes bad, the controller may disable the write cache to prevent data loss in case of a power failure. This can degrade the disk drive performance significantly, as every write operation will have to wait for the disk drives to complete. References:

To free up storage space on a SAN with minimal effort and no additional cost, the following methods can be used:

Configuring compression (Answer A):Compression reduces the size of files stored on the SAN, allowing more data to be stored in the same space.

Enabling deduplication (Answer E):Deduplication identifies and removes duplicate copies of data, reducing the amount of space required for storage.

Deleting old and unused files (Option B):While effective, this requires manual effort and may not be the best long-term solution.

Increasing the number of IOPS (Option C):This relates to improving performance, not reducing storage space.

Decreasing the RAID level (Option D):Lowering the RAID level could reduce redundancy, which may free up space but also decreases fault tolerance.

Upgrading the filesystem type (Option F):This is a complex process that doesn’t directly reduce storage usage.

CompTIA Server+ Reference:This topic is covered underSK0-005 Objective 3.2: Summarize storage technologies and solutions.