Questions with Answers on LAN topologies

What do you mean by Workstation?
What are the use of Server and Cables in LAN?
What are different Types of Ethernet used in LAN?
What is Broadband and base -band?
What are the uses of Optical Fibers?

Explain in brief Network Interface Card.
What are Networks and accessories?
 Explain Gateways Cell Relay, Frame Relay and ISDN,B -ISDN.