CompTIA 220-801 Certification Practice Test

Answer - A - Hubs repeat all traffic. Switches analyze and intelligently direct the traffic.

Key Takeaway: Hubs repeat everything they receive and can be used to extend the network. However, this can result in a lot of unnecessary traffic being sent to all devices on the network. Hubs pass on traffic to the network regardless of the intended destination.

The PCs to which the packets are sent use the address information in each packet to work out which packets are meant for them. Switches 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.