COMPUTER NETWORKS(practical 3)

1.  List the different categories of devices based on OSI layer.
2.  What is role of repeater in computer network also explain the difference between repeater and amplifier.
3.  What is hub?explain types of hub. Explain its working with appropriate block diagram.
4.  Switch is working on which layer of OSI model . Explain its functionality compare to bridge and hub.
5.  What is network adapter?
6.  Explain the role of router in context of other networking devices.