1. After 8.1

2. What PDU is used at layer 3?
Bits
Packet
Segment
Frame
Something else
1 of 3

3. What PDU is used at layer 1?
Bits
Packet
Segment
Frame
Something else
2 of 3

4. Which function is not part of layer 1?
Physical and electrical properties of the media
Mechanical properties of the connectors
Routing
Representation of bits on the media
Encoding of control signals
3 of 3

5. After 8.2

6. An Ethernet switch is labeled “100 Mbps”. What is that value?
Bandwidth
Throughput
Goodput
Frequency
Bit time

7. This Windows box shows a speed of 27.7 MB/second. What is that value?
Bandwidth
Throughput
Goodput
Frequency
Bit time

8. What technique uses 10 bits to encode a single byte?AM
4B/5B
Manchester
NRZ FM

9. Which technique signals a 1 with a low-to-high voltage transition and a 0 with a high-to-low voltage transition?
4B/5B
Optical
Manchester
NRZ AM

10. Which technique is so slow that it can't even transmit 10 Mbps?AM
Optical
Manchester
NRZ
4B/5B

11. After 8.3

12. Which standard allows segment lengths up to 80 km?
10BASE-T
100BASE-TX
100BASE-FX
1000BASE-T
10GBASE-ZR

13. Which standard is the slowest?
10BASE-T
100BASE-TX
100BASE-FX
1000BASE-T
10GBASE-ZR

14. Which standard is used by normal voice-only cell phones?
802.15
802.11
802.16
GSM
802.3

15. Which wireless technology is the slowest?
802.11a
802.11b
802.11g
802.11n
802.15

16. Error in the Curriculum!
8.3.6 says "Because light can only travel in one direction over optical fiber, two fibers are required to support full duplex operation"
WRONG
Light can travel both directions simultaneously through glass--we all know that. Two fibers are used merely as a convenience, to make the receivers and transmitters cheaper.