Post No. 54 Computer Networking

Note Answer key at Bottom of the page.
Question:1
Number of bits per symbol used in Baudot code is
a. 7
b. 5
c. 8
d. 9

Question 2:
What is the main difference between DDCMP and SDLC?
a. DDCMP does not need special hardware to final the beginning of a message
b. DDCMP has a message header
c. SDLC has a IP address
d. SDLC does not use CRC

Question 3:
An example of digital, rather than analog, communication is
a. DDD
b. DDS
c. WATS
d. DDT

Question 4:
Terminals are required for 
a. real-time, batch processing & time-sharing
b. real time, time-sharing & distributed message processing
c. real time, distributed processing & manager inquiry
d. real-time,  time sharing & message switching

Question 5:
The receive equilizer reduces delay distortions using a
a. tapped delay lines
b. gearshift
c. descrambler
d. difference engine

Question 6:
Ina synchronous modem, the receive equilizer is known as
a. adaptive equilizer
b. impariment equilizer
c. statistical equilizer
d. compromise equilizer 

Question 7:
The channel in the data communication model can be
a. postal mail services
b. telephone lines
c. radio lines
d. any of the above

Question 8:
A data terminal serves as an
a. Effector
b. sensor
c. both a and b
d. neither a nor b

Question 9:
Which of the following transmission systems provide the highest data rate to in individual device?
a. computer bus
b. telephone lines
c. voice and mode
d. lease lines

Question 10:
A protocol is a set of rules governing a time sequence of events that must take place
a. between peers
b. between an interface
c. between modems
d. across an interface

Answers

1. b
2. a
3. b
4. d
5. a
6. a
7. d
8. c
9. a
10. a

Post No.53 Computer Networking


 

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 by
a. 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: #