CompTIA A+ 220-901

Answer: A - Hubs repeat all traffic, while switches analyze and intelligently direct the traffic.

Key Takeaway: A hub, like a switch, connects devices. Unlike a switch, a hub merely repeats - or passes on - the information it receives so that all the devices connected to it receive the same information. Because a hub passes on all information it receives regardless of the intended destination, using a hub to extend the network can result in a lot of unnecessary. Switches, on the other hand, control the flow of network traffic based on the address information in each packet. A switch learns which devices are connected to its ports by monitoring the packets it receives and then forwards on packets to the appropriate port only. This allows simultaneous communication across the switch, improving bandwidth.