Name:_______________________________________
OSI Model Questions
Question 1: Routers operate at which layer of the OSI model?
physical
transport
network
MAC sublayer of the data link layer
session
Answer: Network
Question 2: Bits are packaged into frames at which layer of the OSI model?
data link
transport
physical
presentation
application
Answer: Data Link
Question 3: Which of the following are benefits of using a layered network model?
A . it specifies how changes to one layer must be propagated through the other layers
B . it facilitates troubleshooting
C . it focuses on details rather than general functions of networking
D . it breaks the complex process of networking into more manageable chunks
E . it allows layers developed by different vendors to interoperate.
A and B only
B, D, and E
A and C only
none of the above
all of the above
Answer:
B, D and E
June 11, 2014
Question 4: The layers of the OSI model, from the top down, are:
application, presentation, session, transport, network, data link, physical
session, presentation, data transport, MAC, network, physical
physical, data link, network, transport, session, presentation, application
presentation, application, session, network, transport, data link, physical
application, encryption, network, transport, logical link control, physical
Answer: application, presentation, session, transport, network, data link, physical
Question 5: Which of the following operate at the presentation layer?
A . MIDI
B . FTP
C . SMTP
D . TFTP
E . JPEG
A and B
A, C, and E
C and E
A and E
none of the above
Answer: A and E
Question 6: Which of the following are transport layer protocols?
TCP and UDP
IP
FTAM
IP and TFTP
TFTP
Answer: TCP and UDP
Question 7: Which of the following are considered to be the upper layer protocols?
presentation and session
application and presentation
application, presentation, and session
application, presentation, session, and transport
application
Answer:
Application, presentation and session
Question 8: Flow control takes place at which layer?
physical
transport
network
MAC sublayer of the data link layer
session
Answer: Transport
Question 9: Encryption takes place at which layer?
application
presentation
session
transport
data link
Answer: Presentation
Question 10: True or False: The network layer uses physical addresses to route data to destination hosts.
True
False
Answer: False: The Network Layer uses logical addresses to route data.
Question 11: Error detection and recovery takes place at which layer?
transport
presentation
data link
application
network
Answer: Transport
Question 12: Which layer establishes, maintains, and terminates communications between applications
located on different devices?
application
presentation
session
network
data link
Answer: Session
Question 13: IP is implemented at which OSI model layer?
transport
session
data link
network
logical link control
Answer: Network
Question 14: Which layer handles the formatting of application data so that it will be readable by the
destination system?
application
presentation
session
transport
data link
Answer: Presentation
Question 15: Which of the following are presentation layer standards? (choose the best answer)
A. MIDI
B. TIFF
C. JPEG
D. MPEG
E. GIF
C and D
B, C, and E
B, C, D, and E
A only
all of the above
Answer: All of the above.
Question 16: Packets are found at which layer?
data link
transport
network
session
physical
Answer: Network: The Network Layer forms frames from the Data Link Layer into packets.
Question 17: Which layer translates between physical (MAC) and logical addresses?
network
data link
transport
physical
session
Answer: Network
Question 18: What does OSI stand for?
A. International Standards Organization
B. Open Systems Interconnect
C. Operating Standard Information
D. Operating System Interconnection
E. Open Systems Interface
Answer: Open Systems Interconnect: The Open System Interconnect (OSI) Model was developed by the
International Organization of Standardization (ISO).
Question 19: Repeaters and hubs operate at which layer?
network
data link
transport
physical
session
Answer: Physical
Question 20: Bit synchronization is handled at which layer?
data link
session
transport
presentation
physical
Answer: Physical
Question 21: True or False: most logical addresses are preset in network interface cards at the factory
true
false
Answer: False: Hardware (MAC) addresses are (except in rare instances) preset at the factory. Logical addresses
are configured by a network administrator.
Question 22: Bridges operate at which layer of the OSI model?
physical
data link
transport
network
session
Answer: Data Link
Question 23: What are the sublayers of the data link layer?
MAC and IPX
hardware and frame
MAC and LLC
WAN and LAN
TFTP and telnet
Answer: MAC and LLC
Question 24: Which layer translates between physical and logical addresses?
the MAC sublayer of the data link layer
transport
physical
application
network
Answer: Network
Question 25: Which layer is responsible for packet sequencing, acknowledgments, and requests for
retransmission?
The MAC sublayer of the data link layer
transport
physical
application
network
Answer: Transport