TEL102: Telecommunications 2

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Assignment 6

1. Identify the three fundamental shapes of physical topologies.
2. How many communication channels does a simple physical bus have?
3. Which topology requires the most cabling?
4. Which topology is the most popular?
5. Identify the maximum number of allowed 100BASE-TX network segments.
6. Which backbone uses a single device as a central connection point?
7. Which backbone offers redundant links?
8. Identify the switching method used by Ethernet.
9. Identify the access method used by all forms of Ethernet.
10. Above what percentage is the collision rate deemed excessive?
11. Which Ethernet Frame type is most used today?
12. To what extent does an Ethernet preamble count toward frame size?
13. What type of address occupies the source field in an Ethernet frame?
14. The minimum size of an Ethernet frame is ____________.
15. Is it more efficient to support one or two Ethernet frame types?
16. Which technology runs on two complete rings?
17. An ATM packet size is always _____________.
18. What converts incoming Ethernet frames into ATM cells?
19. What type of signaling is used by most wireless networks?
20. Which network type has more overhead, 802.11 or 802.3?
21. Which layer of the OSI model performs Association?
22. Identify the type of frame performing association.
23. What is the compatibility between the 802.11a, b, and g standards?
24. Which wireless standard allows a piconet master to act as a slave in another piconet?
25. Identify the condition/situation where infrared wireless communication is appropriate.

Know the Following Terms

• Access Method
• Beacon Frame
• CSMA/CA
• CSMA/CD
• Circuit/Message/Packet Switching
• FDDI
• Jamming
• LANE
• Padding
• Piconet
• Scatternet
• Virtual Circuit