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- Question
A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?
Options- A. 32 kbps
- B. 8 kbps
- C. 128 kbps
- D. 64 kbps.
- Correct Answer
- 8 kbps
- 1. Which of the following statements is incorrect?
Options- A. The difference between synchronous and asynchronous transmission is the clocking derived from the data in synchronous transmission
- B. Half-duplex line is a communication line in which data can move in two directions, but not at the same time.
- C. Teleprocessing combines telecommunications and DP techniques in online activities.
- D. Batch processing is the preferred processing mode for telecommunication operations
- E. None of the above Discuss
- 2. A group of 2m - 1 routers are interconnected in a centralized binary tree, with router at each tree node. Router I communicate with router J by sending a message to the root of the tree. The root then sends the message back down to J. Then find the mean router-router path length.
Options- A. 2 (m - 2)
- B. 2 (2m - 1)
- C. m - 1
- D. (2m - l)/mJ Discuss
- 3. The CCITT Recommendation X.25 specifies three layers of communications:
Options- A. application, presentation and session
- B. Session, transport and network
- C. physical datalink and network
- D. datalink, network and transport Discuss
- 4. Information systems with common hardware, software, and network standards that provide easy access for end users and their networked computer systems. Select the best fit for answer:
Options- A. TCP/IP
- B. Protocol
- C. Open Systems
- D. Internetwork processor Discuss
- 5. Which of the following is an example of a client-server model?
Options- A. TELNET
- B. FTP
- C. DNS
- D. All of the above
- E. None of the above Discuss
- 6. The main difference between synchronous and asynchronous transmission is
Options- A. the clocking is derived from the data in synchronous transmission
- B. the clocking is mixed with the data in asynchronous transmission
- C. the pulse height is different.
- D. the bandwidth required is different
- E. None of the above Discuss
- 7. Which of the following technique is used for allocating capacity on a satellite channel using fixed-assignment FDM?
Options- A. Amplitude modulation
- B. Frequency-division multiple access
- C. Frequency modulation
- D. Frequency-shift keying
- E. None of the above Discuss
- 8. The 802.5 standard implements a way for preventing collisions on the network. How are collisions prevented when using this standard?
Options- A. CSMA/CD
- B. Token passing
- C. Collision detection
- D. Time sharing
- E. Switched repeaters Discuss
- 9. Which of the following summation operation is performed on the bits to check an error-detecting code?
Options- A. Codec
- B. Coder-decoder
- C. Checksum
- D. Attenuation
- E. None of the above Discuss
- 10. The X.25 standard specifies a
Options- A. technique for start-stop data
- B. technique for dial access
- C. DTE/DCE interface
- D. data bit rate
- E. None of the above Discuss
Networking problems
Search Results
Correct Answer: Batch processing is the preferred processing mode for telecommunication operations
Correct Answer: 2 (m - 2)
Correct Answer: physical datalink and network
Correct Answer: Open Systems
Correct Answer: All of the above
Correct Answer: the clocking is derived from the data in synchronous transmission
Correct Answer: Frequency-division multiple access
Correct Answer: Token passing
Correct Answer: Checksum
Correct Answer: DTE/DCE interface
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