Three different types of Network Devices would be
1. A Hub. A hubs is essential multiport device that coneects multiple Ethernet devices into a single broadcast network. which makes them prone to traffic congestions. There are three types of Hub. Passive, Active, intelligent.
2.The Bridge is different then the Hub because the Hub connects multiple devices where the Brigde connects two or more network and filters the traffic between them the role is to isolate local segment traffic adn reduce traffic congestion for better network performanve.
3. The Router its main job is to direct traffic to thier destinations and chart the path through interconnected network devices that store information about their coneectd networks