Bits are packaged into frames at which layer of the OSI model?
A.
data link
B.
transport
C.
physical
D.
presentation
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.
A and B only
B.
B, D, and E
C.
A and C only
D.
none of the above
4.
The layers of the OSI model, from the top down, are:
A.
application, presentation, session, transport, network, data link, physical
B.
session, presentation, data transport, MAC, network, physical
C.
physical, data link, network, transport, session, presentation, application
D.
presentation, application, session, network, transport, data link, physical
5.
Which of the following operate at the presentation layer? A . GIF B . FTP C . SMTP D . TFTP E . JPEG
A.
A and B only
B.
A, C, and E
C.
C and E
D.
A and E
6.
Which of the following are transport layer protocols?
A.
TCP and UDP
B.
IP
C.
FTAM
D.
IP and TFTP
7.
Which of the following are considered to be the upper layer protocols?
A.
presentation and session
B.
application and presentation
C.
application, presentation, and session
D.
application, presentation, session, and transport
8.
Flow control takes place at which layer?
A.
physical
B.
transport
C.
network
D.
session
9.
Encryption takes place at which layer?
A.
application
B.
presentation
C.
session
D.
transport
10.
True or False: The network layer uses physical addresses to route data to destination hosts.
A.
True
B.
False
11.
Error detection and recovery takes place at which layer?
A.
transport
B.
presentation
C.
data link
D.
application
12.
Which layer establishes, maintains, and terminates communications between applications located on different devices?
A.
application
B.
presentation
C.
session
D.
network
13.
IP is implemented at which OSI model layer?
A.
transport
B.
session
C.
data link
D.
network
14.
Which layer handles the formatting of application data so that it will be readable by the destination system?
A.
application
B.
presentation
C.
session
D.
transport
15.
Which of the following are presentation layer standards? (choose the best answer) A. SMTP B. EXE C. JPEG D. MPEG E. GIF
A.
C and D
B.
D, C, and E
C.
B, C, D, and E
D.
E only
16.
Packets are found at which layer?
A.
data link
B.
transport
C.
network
D.
session
17.
Which layer translates between physical and logical addresses?
