Question 1:In OSI network architecture, the dialogue control and token management are responsibility of
a. session layer
b. network layer
c. transport layer
d. data link layer
e. none of above
1.Answer : (a)
Explaination: #
Question 2: In OSI network architecture, the routing is performed bya. network layer
b. data link layer
c. transport layer
d. session layer
e. none of above
2.Answer : (a)
Explaination: #
Question 3: Which of the following performs modulation and demodulation?
a. fiber optics
b. satellite
c. coaxial cable
d. modem
e. none of the above
3.Answer : (d)
Explaination: #
Question 4: The process of converting analog signals into digital signals so they can be processed by a receiving computer is referred to as:
a. modulation
b. demodulation
c. synchronizing
d. digitising
4.Answer : (d)
Explaination: #
Question 5: How many OSI layers are covered in the X.25 standard?
a. Two
b. Three
c. Seven
d. Six
e. None of above
5.Answer : (b)
Explaination: #
Question 6:Layer one of the OSI model is
a. physical layer
b. link layer
c. transport layer
d. network layer
e. none of above
6.Answer : (a)
Explaination: #
Question 7:The x.25 standard specifies a
a. technique for start-stop data
b. technique for dial access
c. DTE/DCE interface
d. data bit rate
e. none of above
7.Answer : (c)
Explaination: #
Question 8: Which of the following communication modes support two-way traffic but in only one direction at a time?
a. simplex
b. half duplex
c. three-quarters duplex
d. all of the above
e. none of the above
8.Answer : (b)
Explaination: #
Question 9: Which of the following might be used by a company to satisfy its growing communications needs?
a. front end processor
b. multiplexer
c. controller
d. concentrator
e. all of the above
9.Answer : (e)
Explaination: #
Question 10: What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?
a. 4
b. 2
c. 6
d. 3
e. none of the above
10.Answer : (d)
Explaination: #