What are the principal advantages of packets?

Why are protocols needed?

What are the basic protocol layers? What do they do?

What is the difference between packet and circuit switching?

What is a virtual circuit?

What is a routed network?

Why is twisted-pair cable so popular?

What is the difference between single mode and multimode fiber?

What is the bandwidth capacity of single mode fiber?

What are the fundamental network topologies?

What are the two principal types of multiplexing?

What is multicasting?

Why are intelligent network devices increasingly popular?

What is the difference between a router and a switch?