NETWORK MCQS ENTRY TEST PCS/CSS

 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

Question 2:

In OSI network architecture, the routing is performed by

a. network layer  
b. data link layer 
c. transport layerd. 
D session layere.  
  E none of above

Question 3:

Which of the following performs modulation and demodulation?
a. fiber optics
b. satellite
c. coaxial cable 
d. modeme. 
none of the above

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. digitizing

Question 5:

How many OSI layers are covered in the X.25 standard?
a. Two 
b. Three 
c. Seven
d. Sixe. 
None of above

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

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 ratee. none of above

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 abovee.
none of the above

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. controllerd. concentrator 
e. all of the above

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. 33
. none of the above