Which two types of Customer Replaceable Units (CRUs) exist?

The correct answer identifies two distinct types of Customer Replaceable Units (CRUs), which are categorized into Self-Service and Optional Service.

Self-Service CRUs are intended for customers to easily replace or upgrade components of their devices without the need for professional help. This includes items like batteries, hard drives, and memory modules that are designed to be user-friendly and often come with instructions for installation.

Optional Service CRUs, on the other hand, may involve components that require a bit more technical skill or specific tools for installation, but they are still provided to customers as options for self-repair. These may include additional hardware that enhances the existing setup or upgrades that improve device performance.

This classification helps clarify the ease of replacement and the level of technical expertise required, guiding consumers on how best to maintain and upgrade their devices without needing to send them to a service center for every repair or enhancement. Such classifications empower customers, promoting greater satisfaction and efficiency in device management.