Data Communication And Networking Mac 260 Final Review Test

97 Questions

Settings
Please wait...
Data Communication And Networking Mac 260 Final Review Test

Test preparation for MAC 260 TELEPROCESSING DATA COMMUNICATION AND NETWORKINGS


Questions and Answers
  • 1. 
    If impulse noise interferes with a digital signal, often the original digital signal cannot be recognized and recovered.
    • A. 

      True

    • B. 

      False

  • 2. 
    White noise is dependent on the temperature of the medium.
    • A. 

      True

    • B. 

      False

  • 3. 
    The CRC error-detection method treats the packet of data to be transmitted as a large polynomial.
    • A. 

      True

    • B. 

      False

  • 4. 
    An unfortunate side effect of noise during a transmission is that the transmit- ting station has to slow down its transmission rate.
    • A. 

      True

    • B. 

      False

  • 5. 
    If jitter becomes too great, correcting it can require the transmitting devices to speed up their transmission rates.
    • A. 

      True

    • B. 

      False

  • 6. 
    Returning a message was one of the first error-control techniques developed.
    • A. 

      True

    • B. 

      False

  • 7. 
     Error bursts occur ____ percent of the time.
    • A. 

      2 to 5

    • B. 

      5 to 10

    • C. 

      8 to 10

    • D. 

      10 to 20

  • 8. 
    The CRC method is almost foolproof.
    • A. 

      True

    • B. 

      False

  • 9. 
    Sliding window protocols have been around since the 1970s.
    • A. 

      True

    • B. 

      False

  • 10. 
    Because white noise is relatively continuous, it can be reduced significantly but never completely eliminated.
    • A. 

      True

    • B. 

      False

  • 11. 
    Typically, impulse noise is a(n) ____ burst of energy.
    • A. 

      Digital

    • B. 

      Analog

    • C. 

      Binary

    • D. 

      Logical

  • 12. 
    High humidity and wet weather can cause an increase in electrical ____ over a telephone system.
    • A. 

      Compression

    • B. 

      Attenuation

    • C. 

      Jitter

    • D. 

      Crosstalk

  • 13. 
    To minimize the effect of echo, a device called a(n) ____ can be attached to a line.
    • A. 

      Echo suppressor

    • B. 

      Repeater

    • C. 

      Amplifier

    • D. 

      Hub

  • 14. 
    In a stop-and-wait error control system, a receiver may acknowledge multiple packets with a single ACK.
    • A. 

      True

    • B. 

      False

  • 15. 
    ____ means that if the transmitting modem sends data and the data arrives garbled, the receiving modem may ask the transmitting modem to fall back to a slower transmission speed.
    • A. 

      Impulse negotiation

    • B. 

      Fallback negotiation

    • C. 

      Attenuation

    • D. 

      Downlink

  • 16. 
    Twisted pair Category 5e/6 cable should not be longer than the recommended 100-meter (300-foot) distance when it’s transmitting at ____ Mbps.
    • A. 

      100

    • B. 

      250

    • C. 

      500

    • D. 

      1000

  • 17. 
     ____ is the result of small timing irregularities that become magnified during the transmission of digital signals as the signals are passed from one device to another.
    • A. 

      White noise

    • B. 

      Jitter

    • C. 

      Attenuation

    • D. 

      Echo

  • 18. 
    Installing proper shielding on cables prevents ____.
    • A. 

      White noise

    • B. 

      Impulse noise

    • C. 

      Attenuation

    • D. 

      Crosstalk

  • 19. 
    The most basic error-detection techniques are parity checks, which are used with ____ connections.
    • A. 

      Synchronous

    • B. 

      Asynchronous

    • C. 

      Statistical

    • D. 

      Fiber-optic

  • 20. 
       ____ for error control is becoming a mode of operation for some newer wide area network transmission techniques.
    • A. 

      Returning a message

    • B. 

      Doing nothing

    • C. 

      Correcting the error

    • D. 

      Fixing the error

  • 21. 
    ____________________ is a relatively continuous type of noise and is much like the static you hear when a radio is being tuned between two stations.
  • 22. 
     ____________________ is a noncontinuous noise and one of the most difficult errors to detect, because it can occur randomly.
  • 23. 
      ____________________ is an unwanted coupling between two different signal paths.
  • 24. 
    ____________________ is the reflective feedback of a transmitted signal as the signal moves through a medium.
  • 25. 
    T A(n) ____________________ is essentially a filter that allows the signal to pass in one direction only.
  • 26. 
    Ele When a digital signal is being transmitted, the rises and falls of the signal can start to shift, or become blurry, and thus produce ____________________.
  • 27. 
       ____________________ is the continuous loss of a signal’s strength as it travels though a medium.
  • 28. 
      When a modem first makes a connection with another modem, the two modems participate in ____________________ negotiation.
  • 29. 
     Simple parity comes in two basic forms: even parity and ____________________ parity.
  • 30. 
     With ____________________ parity, the 0 or 1 added to the string produces an odd number of binary 1s.
  • 31. 
     The ____________________ method typically adds 8 to 32 check bits to potentially large data packets and yields an error detection capability approaching 100 percent.
  • 32. 
     A(n) _________________________ is an industry-approved bit string that is used to create the cyclic checksum remainder.
  • 33. 
    A local area network is only as strong as its strongest link.
    • A. 

      True

    • B. 

      False

  • 34. 
    Many higher-speed local area networks provide the capabilities of transfer- ring video images and video streams.
    • A. 

      False

    • B. 

      True

  • 35. 
    The local area network first appeared in the 1950s.
    • A. 

      True

    • B. 

      False

  • 36. 
    By keeping all of the application on the server, the network can control access to the software and can reduce the amount of disk storage required on each user’s workstation for this application.
    • A. 

      True

    • B. 

      False

  • 37. 
    A local area network cannot interface with other local area networks.
    • A. 

      True

    • B. 

      False

  • 38. 
    Baseband signaling typically uses multiple digital signals to transmit data over the bus.
    • A. 

      True

    • B. 

      False

  • 39. 
    Hubs support only twisted pair cable for interhub connection.
    • A. 

      True

    • B. 

      False

  • 40. 
    In a sliding-winow error control system, a receiver may acknowledge multiple packets with a single ACK.
    • A. 

      True

    • B. 

      False

  • 41. 
    With the CSMA/CD protocol, only one workstation at a time can transmit.
    • A. 

      True

    • B. 

      False

  • 42. 
    If the network is experiencing a high amount of traffic, the chances forcollision are small.
    • A. 

      True

    • B. 

      False

  • 43. 
        The most popular example of a contention-based protocol is the token- passing protocol.
    • A. 

      True

    • B. 

      False

  • 44. 
    The bridge, in most applications, has been replaced with the switch.
    • A. 

      True

    • B. 

      False

  • 45. 
    A hub is a simple device that requires virtually no overhead to operate.
    • A. 

      True

    • B. 

      False

  • 46. 
    Most bridges (and switches) are transparent, which means they learn by themselves.
    • A. 

      True

    • B. 

      False

  • 47. 
    Switches can significantly decrease interconnection traffic and increase the throughput of the interconnected networks or segments.
    • A. 

      True

    • B. 

      False

  • 48. 
    The 802.11 specification defined six different types of physical layer connections.
    • A. 

      True

    • B. 

      False

  • 49. 
    A cut-through switch does not store a data frame and then forward it.
    • A. 

      True

    • B. 

      False

  • 50. 
    The logical link control sublayer defines the layout or format of the data frame, simply called the frame.
    • A. 

      True

    • B. 

      False

  • 51. 
    The term “Base”, such as in 10Base5, is an abbreviation for baseband signals using a Manchester encoding.
    • A. 

      True

    • B. 

      False

  • 52. 
    1000BaseSX was the first Gigabit Ethernet standard.
    • A. 

      True

    • B. 

      False

  • 53. 
    1000BaseT is capable of using only the Category 7 cable specification.
    • A. 

      True

    • B. 

      False

  • 54. 
    In the case of CSMA/CD local area networks, as the networks grow in size,their performance increases.
    • A. 

      True

    • B. 

      False

  • 55. 
    Using coaxial cable to transmit analog signals, 10Broad36 can transmit data at 10 Mbps for a maximum segment distance of 3600 meters.
    • A. 

      True

    • B. 

      False

  • 56. 
    Network operating systems are essential if the network is going to allow multiple users to share resources.
    • A. 

      True

    • B. 

      False

  • 57. 
    In reality, a multitasking operating system runs only one program at a time.
    • A. 

      True

    • B. 

      False

  • 58. 
    The resources that a network operating system must manage typically include one or more network servers.
    • A. 

      True

    • B. 

      False

  • 59. 
    A network operating system does not perform network support functions.
    • A. 

      True

    • B. 

      False

  • 60. 
    The design of a tree should ideally be similar to a pyramid.
    • A. 

      True

    • B. 

      False

  • 61. 
    Windows NT is a network operating system designed to run over a network of microcomputer workstations and provide file sharing and peripheral sharing.
    • A. 

      True

    • B. 

      False

  • 62. 
    Linux software cannot support e-mail servers, Web servers, FTP servers, file/ print servers, firewalls, proxy servers, and Domain Name System (DNS) servers.
    • A. 

      True

    • B. 

      False

  • 63. 
    A network operating system needs a host machine from which to operate.
    • A. 

      True

    • B. 

      False

  • 64. 
    Network servers only include mainframe computers.
    • A. 

      True

    • B. 

      False

  • 65. 
    A network server requires at least three connections to the network in the form of a network interface card.
    • A. 

      True

    • B. 

      False

  • 66. 
    Every software company may create its own brand of user licenses and may name them something unique.
    • A. 

      True

    • B. 

      False

  • 67. 
    Current estimates suggest that there are more than 450 million hosts (computer sites that store and deliver Web pages) connected to the Internet.
    • A. 

      True

    • B. 

      False

  • 68. 
    Currently, almost all networks involved in the Internet use IP version 6.
    • A. 

      True

    • B. 

      False

  • 69. 
    The IP datagram fields Identification, Flags, and Fragment Offset are used to fragment a datagram into smaller parts.
    • A. 

      True

    • B. 

      False

  • 70. 
    Using a Web browser, you can download and view Web pages on a personal computer.
    • A. 

      True

    • B. 

      False

  • 71. 
    Browsers allow users to download and view World Wide Web pages.
    • A. 

      True

    • B. 

      False

  • 72. 
    A 16-bit address uniquely defines a connection to the Internet.
    • A. 

      True

    • B. 

      False

  • 73. 
    Home and small business local area networks often use NAT to conserve IP addresses.
    • A. 

      True

    • B. 

      False

  • 74. 
    IP is the protocol used by most networks and network applications to create an error-free, end-to-end network connection.
    • A. 

      True

    • B. 

      False

  • 75. 
    Every object on the Internet has a unique English-based address called its Uniform Resource Locator (URL).
    • A. 

      True

    • B. 

      False

  • 76. 
    The UDP header contains only four fields—Source Port, Destination Port, Length, and Checksum.
    • A. 

      True

    • B. 

      False

  • 77. 
    All Uniform Resource Locators consist of six parts.
    • A. 

      True

    • B. 

      False

  • 78. 
    Like its counterpart IP, TCP is a fairly streamlined protocol.
    • A. 

      True

    • B. 

      False

  • 79. 
    Intranets use essentially the same hardware and software that is used by other network applications.
    • A. 

      True

    • B. 

      False

  • 80. 
    HTML pages are simple, static text documents that browsers read, interpret,and display on the screen.
    • A. 

      True

    • B. 

      False

  • 81. 
    The File Transfer Protocol, or FTP, was one of the first services offered on the Internet.
    • A. 

      True

    • B. 

      False

  • 82. 
    For a receiver to be able to fix an error—in a process called ____—redundant information must be present so that the receiver knows which bit or bits are in error and what their original values were.
    • A. 

      Forward error correction

    • B. 

      Forward error detection

    • C. 

      Backward error correction

    • D. 

      Backward error detection

  • 83. 
    ____ cable is the medium least prone to generating errors.
    • A. 

      Fiber-optic

    • B. 

      Coaxial

    • C. 

      Twisted-pair

    • D. 

      Copper-based

  • 84. 
    Standard Generalized Markup Language (SGML) is a markup language.
    • A. 

      True

    • B. 

      False

  • 85. 
    ____ is probably the most common form of error control.
    • A. 

      Do nothing

    • B. 

      Correct the error without retransmission

    • C. 

      Sending a message back to the transmitter

    • D. 

      Correct the error with retransmission

  • 86. 
    When working with stop-and-wait error control, the amount of time a station waits before retransmitting a packet is called ____.
    • A. 

      Stop time

    • B. 

      ACK time

    • C. 

      NAK time

    • D. 

      Timeout

  • 87. 
    ____ is a flow control scheme that allows a station to transmit a number of  data packets at one time before receiving some form of acknowledgment.
    • A. 

      Stop-and-wait

    • B. 

      Sliding window

    • C. 

      Timeout

    • D. 

      ACK window

  • 88. 
    With the sliding window protocol, a station that had a maximum window size of 7 could transmit only ____ data packets at one time before it had to stop and wait for an acknowledgment.
    • A. 

      5

    • B. 

      6

    • C. 

      7

    • D. 

      8

  • 89. 
    Early local area networks transmitted data at only ____ million bits per second.
    • A. 

      1

    • B. 

      10

    • C. 

      100

    • D. 

      1000

  • 90. 
    A local area network performs file serving when it’s connected to a workstation with a large storage disk drive that acts as a central storage repository, or ____ server.
    • A. 

      File

    • B. 

      Printer

    • C. 

      Database

    • D. 

      Application

  • 91. 
    When two or more hubs are interconnected and a workstation transmits data,  all the workstations connected to all the hubs receive the data. This is an example of a(n)______.
    • A. 

      Wireless topology

    • B. 

      Switched network

    • C. 

      Shared network

    • D. 

      FDDI topology

  • 92. 
    The ____ topology consists of a simple cable, or bus, to which all devices attach.
    • A. 

      Bus/tree

    • B. 

      Token ring

    • C. 

      Ring star

    • D. 

      Star

  • 93. 
    In a bus/tree topology, connecting to the cable requires a simple device called a(n)____.
    • A. 

      Hub

    • B. 

      Router

    • C. 

      Tap

    • D. 

      Echo suppressor

  • 94. 
    The most popular configuration for a local area network is the ____ topology.
    • A. 

      Ring

    • B. 

      Star-wired bus

    • C. 

      Bus

    • D. 

      Tree

  • 95. 
    ____ cabling has become the preferred medium for star-wired bus topologies.
    • A. 

      Twisted pair

    • B. 

      Coaxial

    • C. 

      Fiber-optic

    • D. 

      FDDI

  • 96. 
    Two different signaling technologies can be used with a bus network: baseband signaling and ____ signaling.
    • A. 

      Multiband

    • B. 

      Broadband

    • C. 

      Uniband

    • D. 

      Singleband

  • 97. 
    A local area network that is not based primarily on physical wiring but uses wireless transmissions between workstations is a(n) ____.
    • A. 

      FDDI

    • B. 

      Token ring

    • C. 

      MAy

    • D. 

      WLAN