Ethernet

Listen to the first 20 minutes of Security Now Podcast about Ethernet and answer the following questions. You can access this at school. See your teacher to access it. Alternatively, you can download it at http://media.grc.com/sn/SN-029.mp3. When they reference social security number, you need to think tax file number.

What is a MAC address? Why is it unique?
Why can't they be used as addresses in a WAN instead of IP addresses?
In the original bus network connected by coaxial cable what was at each end?
How were computers connected to the bus network at that time?
What was one of the big draw backs with that type of network?
Identify and describe the other LAN technology available at that time.
What does CSMA/CD stand for?
How does it work?
Why do collisions occur?
What happens if a collision occurs?
Why don't token ring networks have collisions?
What happens as the amount of LAN traffic increases?
Describe hubs (how they are used and their drawbacks) - BUS NETWORK
Describe switches (how they are used and their drawbacks) - STAR NETWORK
Hubs and switches both have a physical topology of the star network. However, hubs are considered logical bus networks - Why?

NOTE: a term that we haven't covered but you need to know is Bridge.
Bridges are devices used to connect two local area networks using the same protocol- Ethernet or Token Ring