What are the key components of a VPLEX system?

The key components of a VPLEX system are indeed best captured by the second choice, which includes service modules, back-end storage, and management interfaces.

Service modules are integral to the VPLEX architecture as they handle data movement and provide the functionality for managing storage resources across different sites. This enables features like data mobility and availability, which are central to what VPLEX aims to achieve—ensuring that data is accessible and can be shared across different environments.

Back-end storage is another critical component, as it represents the actual storage resources that VPLEX interacts with. This storage can be an array or different types of storage systems that VPLEX aggregates and manages for consistent data access across geographical locations.

Management interfaces are essential for administrators to configure, monitor, and optimize the VPLEX system. These interfaces allow for seamless management of the system and its components, which is crucial in maintaining the performance and reliability of the virtual storage environment.

The other choices do not accurately reflect the primary components of a VPLEX system, making option two the most suitable answer.