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- Question
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
- Correct Answer
- data communication
- 1. Error detection at a data link level is achieved by
Options- A. bit stuffing
- B. cyclic redundancy codes
- C. Hamming codes
- D. equalization Discuss
- 2. 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. Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the correct statement about broadband and baseband.
Options- A. Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel
- B. Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
- C. Baseband refers to local area networks, and broadband refers to wide area networks.
- D. Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed
- E. Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions Discuss
- 10. A 8-Mbps token ring has a token holding timer value of 10 msec. What is the longest frame (assume header bits are negligible) that can be sent on this ring?
Options- A. 8000 B frame
- B. 80,000 B frame
- C. 8 x 105 bit frame
- D. 10,000 B frame Discuss
Networking problems
Search Results
Correct Answer: cyclic redundancy codes
Correct Answer: converting analog to digital signals
Correct Answer: Checksum
Correct Answer: star network
Correct Answer: Modem
Correct Answer: All of the above
Correct Answer: mail gateway
Correct Answer: menu selection
Correct Answer: Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable
Correct Answer: 10,000 B frame
Explanation:
At 8 Mbps, a station can transmit 80,000 bits or 10,000 bytes in 10 msec. This is an upper bound on frame length. From this amount, some overhead must be subtracted, giving a slightly lower limit for the data portion. Therefore, 10,000 B frame is the correct answer.
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