Networking problems
- 1. An error-detecting code inserted as a field in a block of data to be transmitted is known as
Options- A. Frame check sequence
- B. Error detecting code
- C. Checksum
- D. flow control
- E. None of the above Discuss
Correct Answer: Frame check sequence
- 2. If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is
Options- A. 1200 bands
- B. 3200 bands
- C. 4800 bands
- D. 9600 bands
- E. None of the above Discuss
Correct Answer: 3200 bands
- 3. Data are sent over pin _____ of the EIA-232 interface.
Options- A. 2
- B. 3
- C. 4
- D. All of the above Discuss
Correct Answer: 2
- 4. The receive equalizer reduces delay distortions using a
Options- A. tapped delay lines
- B. gearshift
- C. descrambler
- D. difference engine
- E. None of the above Discuss
Correct Answer: tapped delay lines
- 5. Which network topology is considered passive?
Options- A. Cross
- B. Ring
- C. Star
- D. Mesh
- E. Bus Discuss
Correct Answer: Bus
- 6. Four routers have to be interconnected in a point-to-point Network. Each pair of root us may connected by a high-speed line, a medium speed line or a low speed line. Find the total number of topologies.
Options- A. 12
- B. 81
- C. 48
- D. 729 Discuss
Correct Answer: 729
- 7. The cheapest modems can transmit
Options- A. 300 bits per second
- B. 1,200 bits per second
- C. 2,400 bits per second
- D. 4,800 bits per second
- E. None of the above Discuss
Correct Answer: 300 bits per second
- 8. Which of the following technique is used for encapsulation?
Options- A. a technique used in best-effort delivery systems to avoid endlessly looping packets.
- B. a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.
- C. One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
- D. All of the above
- E. None of the above Discuss
Correct Answer: a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.
- 9. Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a long distance transmission?
Options- A. Interface
- B. Modem
- C. Attenuation
- D. Teleprocessor
- E. None of the above Discuss
Correct Answer: Modem
- 10. A central computer surrounded by one or more satellite computers is called a
Options- A. bus network
- B. ring network
- C. star network
- D. All of the above
- E. None of the above Discuss
Correct Answer: star network
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