What is the primary function of a concentrator in a network?

The primary function of a concentrator in a network is to serve as a termination point for network cables, particularly in environments where multiple devices need to be connected to a shared line. Concentrators aggregate and manage the signals from these devices, effectively allowing them to communicate with each other over a central point. This function is vital in various network setups, including bus and star topologies, where the concentrator acts as a hub that can manage multiple data streams while minimizing collision and network congestion.

In contrast, the other options relate to different network functionalities. Providing power to network nodes pertains more to Power over Ethernet (PoE) devices or switches rather than the role of a concentrator. Encrypting data is relevant to maintaining security in network communications, but it does not describe the primary function of a concentrator. Lastly, managing network traffic through routing is a task performed by routers, which direct data between networks, rather than by a concentrator that primarily focuses on connecting devices.