CompTIA CASP+ Practice Test

Which technique allows a storage administrator to control access to storage across different hosts?

1. Volume management

2. LUN masking

3. Storage replication

4. Backup snapshots

The correct answer is: LUN masking

LUN masking is a technique specifically designed to control access to storage devices at the logical unit number (LUN) level across different hosts. This process allows storage administrators to define which hosts can see and use specific LUNs, ensuring that only authorized servers or systems have access to certain storage volumes. By implementing LUN masking, organizations can enhance security and prevent unauthorized access to sensitive data stored on LUNs. For example, in environments where multiple servers may share a storage array, LUN masking acts as a gatekeeper, allowing only designated hosts to connect to and interact with particular LUNs. This is essential for maintaining data confidentiality, integrity, and preventing conflicts or corruption resulting from multiple hosts trying to access the same storage resources simultaneously. On the other hand, volume management typically focuses on organizing and managing storage space but does not inherently control which hosts can access specific volumes. Storage replication is about creating copies of data for redundancy and disaster recovery, while backup snapshots refer to capturing the state of a system at a particular point in time, neither of which specifically addresses access control across different hosts.