CCNA Wan Chapter 1

22 Questions
CCNA Quizzes & Trivia

CCNA WAN Chapter 1

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Questions and Answers
  • 1. 
    At which two layers of the OSI model does a WAN operate? (Choose two.)
    • A. 

      Physical Layer

    • B. 

      Data Link Layer

    • C. 

      Network Layer

    • D. 

      Presentation Layer

    • E. 

      Transport Layer

  • 2. 
     Which three WAN devices can be found in the cloud? (Choose three.)
    • A. 

      ATM switches

    • B. 

      Core routers

    • C. 

      CSU/DSU

    • D. 

      Ethernet switches

    • E. 

      Frame Relay switches

  • 3. 
     Which networking device is typically used to concentrate the dial-in and dial-out traffic of multiple users to and from a network?
    • A. 

      Core router

    • B. 

      Access server

    • C. 

      Frame Relay switch

    • D. 

      ATM switch

  • 4. 
     Which packet-switched WAN technology offers high-bandwidth connectivity capable of managing data, voice, and video all on the same infrastructure?
    • A. 

      Time Division Multiplexing (TDM)

    • B. 

      Metro Ethernet

    • C. 

      Integrated Services Digital Network (ISDN)

    • D. 

      Public Switched Telephone Network (PSTN)

  • 5. 
     Which three features are identified with Frame Relay connections? (Choose three.)
    • A. 

      CIR

    • B. 

      DLCI

    • C. 

      DSLAM

    • D. 

      PVC

    • E. 

      53-byte cells

  • 6. 
    Which WAN technology uses a fixed payload of 48 bytes and is transported across both switched and permanent virtual circuits?
    • A. 

      ATM

    • B. 

      ISDN

    • C. 

      Frame Relay

    • D. 

      Metro Ethernet

  • 7. 
     What are two advantages of an analog PSTN WAN connection? (Choose two.)
    • A. 

      Low cost

    • B. 

      Availability

    • C. 

      Traffic encryption

    • D. 

      Available bandwidth

    • E. 

      Support for voice and video

  • 8. 
    What three terms are associated with ISDN PRI? (Choose three.)
    • A. 

      Circuit switching

    • B. 

      DLCI

    • C. 

      Data bearer channels

    • D. 

      Switched virtual circuits

    • E. 

      Time-division multiplexing

  • 9. 
     What can cause a reduction in available bandwidth on a cable broadband connection?
    • A. 

      Smaller cells

    • B. 

      Number of subscribers

    • C. 

      Committed information rate

    • D. 

      Distance from the central office of the provider

  • 10. 
     What type of connectivity is established when VPNs are used from the remote site to the private network?
    • A. 

      PVCs

    • B. 

      DLCIs

    • C. 

      Tunnels

    • D. 

      Virtual circuits

    • E. 

      Dedicated Layer 2 links

  • 11. 
    • A. 

      ATM

    • B. 

      ISDN

    • C. 

      Analog dialup

    • D. 

      T1 Leased Line

  • 12. 
    For digital lines, which device is used to establish the communications link between the customer equipment and the local loop?
    • A. 

      CSU/DSU

    • B. 

      Frame Relay switch

    • C. 

      ISDN switch

    • D. 

      Modem

    • E. 

      PBX switch

  • 13. 
    Which term describes a device that will put data on the local loop?
    • A. 

      DLCI

    • B. 

      DTE

    • C. 

      DCE

    • D. 

      BRI

    • E. 

      PRI

  • 14. 
     Which switching type will allow the communication devices in the provider network to be shared and only allocated to an individual subscriber during data transfer?
    • A. 

      Circuit-switched

    • B. 

      Dedicated switched lines

    • C. 

      Frame-switched

    • D. 

      Packet-switched

  • 15. 
     A company needs a WAN connection that is capable of transferring voice, video, and data at a minimum data rate of 155 Mbps. Which WAN connection is the best choice?
    • A. 

      X.25

    • B. 

      DSL

    • C. 

      ATM

    • D. 

      ISDN BRI

    • E. 

      ISDN PRI

  • 16. 
     Which two devices are commonly used as data communications equipment? (Choose two.)
    • A. 

      Modem

    • B. 

      Router

    • C. 

      CSU/DSU

    • D. 

      ISDN switch

    • E. 

      Ethernet switch

  • 17. 
    Which statement is true of the functionality of the layers in the hierarchical network model?
    • A. 

      The purpose of the access layer is to provide very high bandwidth communications between network devices.

    • B. 

      Most security screening to prevent unauthorized entry to the network happens at the core layer.

    • C. 

      Untrusted external connections are segmented from the rest of the network at all three levels.

    • D. 

      The core layer uses high speed equipment to provide policy-based connectivity.

    • E. 

      The distribution layer aggregates WAN connections at the edge of the campus.

  • 18. 
     Which statement is true about data connectivity between a customer and a service provider?
    • A. 

      Normally the CSU/DSU is the designated demarcation point for the service provider but not the customer.

    • B. 

      The segment between the demarcation point and the central office is known as the "last mile."

    • C. 

      The local loop is the segment between the CSU/DSU and the serial port on a router.

    • D. 

      Putting data on the local loop is the responsibility of the DTE.

  • 19. 
    Which statement is true about the differences between a WAN and a LAN?
    • A. 

      WANs generally support higher bandwidth than LANs support.

    • B. 

      A WAN link typically traverses shorter geographic distances than a LAN link traverses.

    • C. 

      A WAN often relies on the services of carriers, such as telephone or cable companies, but a LAN does not.

    • D. 

      All WAN implementations generally use the same Layer 2 protocol but there are many accepted LAN Layer 2 protocols in use.

  • 20. 
    Why is the call setup time of a circuit-switched WAN implementation considered a drawback?
    • A. 

      Routing protocols are incompatible with this function.

    • B. 

      It restricts the communication sent to voice traffic only.

    • C. 

      A telephone must be used to initially start transferring data.

    • D. 

      Data cannot be transferred until a circuit has been established.

  • 21. 
    • A. 

      ATM differs from other WAN protocols in that it uses variably sized packets.

    • B. 

      Most WAN protocols use HDLC or a variant of HDLC as a framing mechanism.

    • C. 

      The frame header consists of the frame check sequence and cyclic redundancy check.

    • D. 

      ISDN differs from Frame Relay, HDLC, and ATM in that it is packet-switched rather than circuit-switched technology.

  • 22. 
    What is an advantage of packet-switched technology over circuit-switched technology?
    • A. 

      Packet-switched networks are less susceptible to jitter than circuit-switched networks are.

    • B. 

      Packet-switched networks can efficiently use multiple routes inside a service provider network.

    • C. 

      Packet-switched networks do not require an expensive permanent connection to each endpoint.

    • D. 

      Packet-switched networks usually experience lower latency than circuit-switched networks experience.