Describe the main differences between network switches and network hubs.

If you changed your network infrastructure from using hubs to switches, how would the change affect the network traffic that was seen by your PC?

Describe the difference between Circuit switched networks and packet switched networks. Which are more common in 2018.

There were many people involved in the development of packet switching. One notable person worked for the National Physics Laboratory in the UK. What is his name?

Describe the events that led to the development of the ARPANET. (Use the Internet to determine this information).

What year was the first Interface Message Processor delivered to UCLA?

What is the full name of the company that developed the first IMP?

Briefly describe the events that led to the development of the first IMP (Research this on the Internet)

How many Network cards do routers require? Explain?

Describe the basic operation of Routers. (Research this on the Internet)

Two important models of networking are the OSI model and the Internet model.

In what ways do these models help us understand networking?

The Session and Presentation layers of the OSI model do not exist in the Internet model of networking. How is it that encryption and Login still work in TCP/IP applications?

Briefly describe the functions of the following layers:

Application layer
Data Link layer
Network layer
Physical layer

Describe why network switches are often described as Layer 2 devices. (Research this on the Internet)

Interactions at the Data Link layer are sometimes referred to as Hop to Hop communications. How are the interactions at the Network often described? Explain.