CompTIA Cloud+ Practice Test

Which of the following contributes to increased read access performance on a fibre channel SAN?

1. Zoning

2. Clustered storage

3. Caching

4. QoS

The correct answer is: Caching

Caching significantly contributes to increased read access performance on a Fibre Channel Storage Area Network (SAN) by temporarily storing frequently accessed data in a high-speed storage layer, usually in RAM or SSDs. When data is requested, the system first checks the cache to see if it is available there before accessing the slower disk storage. This reduces the time needed to retrieve data, resulting in faster response times for read operations, which is particularly beneficial in environments with high read loads. While zoning, clustered storage, and Quality of Service (QoS) are important components of SAN management and performance, they primarily serve different functions. Zoning provides a method to segment traffic and improve security by restricting access to only necessary devices. Clustered storage allows multiple servers to access the same storage resources, promoting redundancy and scalability but does not specifically focus on optimizing read performance. QoS is aimed at prioritizing bandwidth for different applications or workloads to ensure that critical processes are allocated the necessary resources, yet it does not inherently enhance read access speed on its own.