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- Question
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
- Correct Answer
- All of the above
- 1. 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
- 2. Error detection at a data link level is achieved by
Options- A. bit stuffing
- B. cyclic redundancy codes
- C. Hamming codes
- D. equalization Discuss
- 3. 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
- 4. 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
- 5. 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
- 6. 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
- 7. 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
- 8. 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
- 9. 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
- 10. Compared to analog signals, digital signals
Options- A. allow faster transmission
- B. are more accurate
- C. both (a) and (b)
- D. All of the above
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: data communication
Correct Answer: cyclic redundancy codes
Correct Answer: converting analog to digital signals
Correct Answer: Checksum
Correct Answer: star network
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.
Correct Answer: both (a) and (b)
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