1. After 7.1
Last modified

2. What OSI model layer is responsible for dividing and managing communications between the processes running in the two end systems?
Application, Presentation, or Session
Transport
Network
Data Link
Physical

3. What is the correct term for a PDU at the Data Link layer of the OSI Model?
Packet
Segment
Frame
Message
Data

4. This frame contains a “Type: IP (0x0800)” field
This frame contains a “Type: IP (0x0800)” field. Which part of the OSI model put that value on the frame?
Transport
Network
Logical Link Control
Media Access Control
Physical

5. Which part of the OSI model adds start and stop bit patterns to a frame?
Transport
Network
Logical Link Control
Media Access Control
Physical

6. After 7.2

7. What media access control method is used by 802.11 wireless networks?
Controlled Access
CSMA
CSMA/CD
CSMA/CA
None

8. Which type of network needs no media arbitration at the Data Link layer?
Point-to-point Full Duplex
Point-to-point Half Duplex
Ring
Multi-Access
Ethernet

9. Which type of network resolves collisions by CSMA/CD?
Point-to-point Full Duplex
Point-to-point Half Duplex
Ring
Ethernet connected with a hub
Ethernet connected with a switch

10. After 7.3

11. When PC0 sends a PING to PC3, how many different physical addresses are used to send the data?1 2 3 4
5 or more

12. What portion of the frame contains the CRC?
Layer 3 header
Layer 3 trailer
Layer 2 header
Layer 2 trailer
None of the above

13. Which Data Link protocol uses explicit acknowledgements to ensure that each frame was delivered?
Ethernet
PPP
802.11
All of the above
None of the above

14. PC1 sends a PING to PC2 with TTL=32
PC1 sends a PING to PC2 with TTL=32. What TTL does it have when it reaches PC2?
31 or more 30 29 28
27 or less