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  • Question
  • 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

  • Correct Answer
  • 3200 bands 


  • Networking problems


    Search Results


    • 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
    • 2. If delays are recorded as 10 bit numbers in a 50 router network, and delay vectors are exchanged twice a second, how much bandwidth per fill duplex line is occupied by the distributed routing algorithm?

    • Options
    • A. 500 bps
    • B. 1500 bps
    • C. 5 bps
    • D. 1000 bps
    • Discuss
    • 3. FDDI is a

    • Options
    • A. ring network
    • B. star network
    • C. mesh network
    • D. bus based network
    • E. None of the above
    • Discuss
    • 4. What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?

    • Options
    • A. 16
    • B. 9
    • C. 8
    • D. 4
    • E. None of the above
    • Discuss
    • 5. You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?

    • Options
    • A. 255.255.255.192
    • B. 255.255.255.224
    • C. 255.255.255.240
    • D. 255.255.255.248
    • E. 255.255.255.252
    • Discuss
    • 6. Data are sent over pin _____ of the EIA-232 interface.

    • Options
    • A. 2
    • B. 3
    • C. 4
    • D. All of the above
    • Discuss
    • 7. 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
    • 8. Which network topology is considered passive?

    • Options
    • A. Cross
    • B. Ring
    • C. Star
    • D. Mesh
    • E. Bus
    • Discuss
    • 9. 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
    • 10. 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


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