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- Question
Demodulation is a process of
Options- A. converting analog to digital signals
- B. converting digital to analog signals
- C. multiplexing various signals into one high speed line signals
- D. performing data description.
- Correct Answer
- converting analog to digital signals
- 1. Which of the following summation operations is performed on the bits to check an error-detecting code?
Options- A. Codec
- B. Coder-decoder
- C. Checksum
- D. Attenuation Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. 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
- 6. Error detection at a data link level is achieved by
Options- A. bit stuffing
- B. cyclic redundancy codes
- C. Hamming codes
- D. equalization Discuss
- 7. Transmission of computerised data from one location to another is called
Options- A. data transfer
- B. data flow
- C. data communication
- D. data management
- E. None of the above Discuss
- 8. An example of an analog communication method is
Options- A. laser beam
- B. microwave
- C. voice grade telephone line
- D. All of the above
- E. None of the above Discuss
- 9. A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as
Options- A. Gateways
- B. mail gateway
- C. bridges
- D. User Agent
- E. None of the above Discuss
- 10. When the computer provides the manager with a multiple choice of possible answers, the prompting technique is
Options- A. question and answer
- B. form filling
- C. open-ended question
- D. menu selection
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: Checksum
Correct Answer: star network
Correct Answer: Modem
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.
Correct Answer: 300 bits per second
Correct Answer: cyclic redundancy codes
Correct Answer: data communication
Correct Answer: All of the above
Correct Answer: mail gateway
Correct Answer: menu selection
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