What is the purpose of a Communication Processing Unit (CPU)?

The primary function of a Communication Processing Unit (CPU) revolves around its role in processing communication signals. This involves handling, transforming, and managing the signals that facilitate communication within various systems. It's essential in managing data transmission and reception in communication networks, ensuring that the signals are clear, reliable, and efficiently processed.

While the options regarding data storage, digital transaction facilitation, and network security management are relevant in a broader context, they do not capture the core function of a CPU. The CPU does not directly engage in secure data storage or transaction facilitation, and while it might be involved in some aspects of network security, its main purpose is focused on processing and managing communication signals across networks. Hence, understanding the CPU's key role in communication processing is crucial for grasping the fundamentals of network architecture and data exchange.