CCNA1 Chapter 8 Test

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CCNA1 Chapter 8 Test
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2011-05-25 00:10:19
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This is the the test questions and answers for CCNA1 Chapter 8.
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  1. What is a primary role of the Physical layer in transmitting data on the network?
    create the signals that represent the bits in each frame on to the media

    provide physical addressing to the devices

    determine the path packets take through the network

    control data access to the media
    create the signals that represent the bits in each frame on to the media
  2. What characteristic of UTP cable helps reduce the effects of interference?

    the metal braiding in the shielding

    the reflective cladding around core

    the twisting of the wires in the cable

    the insulating material in the outer jacket
    the twisting of the wires in the cable
  3. What is considered a benefit of wireless as a media choice?

    more host mobility

    lower security risks

    reduced susceptibility to interference

    less impact of the surroundings on the effective coverage area
    more host mobility
  4. Which of the following is a characteristic of single-mode fiber-optic cable?

    generally uses LEDs as the light source

    relatively larger core with multiple light paths

    less expensive than multimode

    generally uses lasers as the light source
    generally uses lasers as the light source
  5. Which characteristics describe fiber optic cable? (Choose two.)

    It is not affected by EMI or RFI.

    Each pair of cables is wrapped in metallic foil.

    It combines the technique of cancellation, shielding and twisting to protect data.

    It has a maximum speed of 100 Mbps.

    It is the most expensive type of LAN cabling.
    It is not affected by EMI or RFI.

    It is the most expensive type of LAN cabling.
  6. Which method of signal transmission uses radio waves to carry signals?

    electrical

    optical

    wireless

    acoustic
    wireless
  7. In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?

    coax

    fiber

    Cat5e UTP

    Cat6 UTP

    STP
    fiber
  8. Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?
    Crossover cable
  9. What are three measures of data transfer? (Choose three.)
    throughput, goodput, and bandwidth
  10. What is a possible effect of improperly applying a connector to a network cable?
    Data transmitted through that cable may experience signal loss.
  11. XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.)
    Cat5 UTP, Cat6 UTP
  12. An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?
    OTDR
  13. Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?
    Physical
  14. With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
    the magnetic field around the adjacent pairs of wire
  15. When is a straight-through cable used in a network?
    when connecting a host to a switch
  16. In most business LANs, which connector is used with twisted-pair networking cable?
    RJ-45
  17. Which type of cable run is most often associated with fiber-optic cable?
    backbone cable

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