Computer Networking (Practice Test)

1.         Number of bits per symbol used in Baudot code is
a. 7
b. 5
c. 8
d. 9

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

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

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

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

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

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

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

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

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

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


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