Which of the following is NOT a type of memory?

The correct answer is based on the understanding of memory types found in computing systems. Server memory refers more to a role or category of memory modules that are used in server environments, rather than a formal classification of memory type. It typically encompasses various types of memory technologies, such as Dynamic RAM (DRAM) or Static RAM (SRAM), which are designed for use in servers due to their performance and reliability characteristics.

Dynamic RAM and Static RAM are both defined types of volatile memory technologies, characterized by how they store data and their use in different applications. Non-volatile memory, on the other hand, refers to memory that retains data even when the power is turned off, such as flash memory.

Thus, while dynamic RAM, static RAM, and non-volatile memory are established categories within the field of memory technology, server memory does not describe a specific type of memory itself but rather the application of certain memory types within server systems. This distinction clarifies why the answer is correct.