Which type of memory is known to be volatile?

RAM, or Random Access Memory, is classified as volatile memory because it loses its data when the power is turned off. Volatile memory is crucial for a computer's performance as it provides fast read and write access to a storage medium that the CPU can use for temporary data. This characteristic allows RAM to store data that is actively being used or processed by applications, contributing to efficient multitasking and application performance.

In contrast, options like SSD (Solid State Drive) and disk storage, which refer to non-volatile memory types, retain data even when the power is off. ROM (Read-Only Memory) is also a type of non-volatile memory that retains its data permanently and is primarily used for firmware and system boot processes. Therefore, RAM stands out distinctly as the volatile memory option in the context of the question.