A network device that connects systems and redirects data on a network and can be either managed or unmanaged is a:

• A. Router
• B. Switches (managed/unmanaged)
• C. Hub
• D. Bridge

Answer: (B)

A switch is the device that connects multiple systems on a local network and forwards traffic only to the port where the destination device is connected. It operates at the data-link layer and builds a MAC address table so each frame is directed to the correct port, which reduces unnecessary traffic. Switches can be unmanaged (plug-and-play) or managed (configurable with features like VLANs and QoS). This matches the description of a device that connects systems, redirects data on the network, and can be either managed or unmanaged. A router links different networks and routes between them; a hub broadcasts every frame to all ports; a bridge connects segments but doesn’t scale or offer the same level of control as a switch.