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    What are two reasons for physical layer protocols to use frame

    encoding techniques? (Choose two.)

    to identify where the frame starts and ends*

    to distinguish data bits from control bits*

    to reduce the number of collisions on the media

    to increase the media throughput

    to provide better media error correction

    2

    Which statement is correct about multimode fiber?

    Multimode fiber commonly uses a laser as a light source.

    Multimode fiber cables carry signals from multiple connected

    sending devices.

    SC-ST patch cords are used with multimode fiber cables.

    SC-SC patch cords are used with multimode fiber cables.*

    3

    Which layer of the OSI model is responsible for specifying the

    encapsulation method used for specific types of media?

    data link*

    application

    transport

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    physical

    4

    The throughput of a FastEthernet network is 80 Mb/s. The

    traffic overhead for establishing sessions, acknowledgments,

    and encapsulation is 15 Mb/s for the same time period. What is

    the goodput for this network?

    15 Mb/s

    55 Mb/s

    65 Mb/s*

    95 Mb/s

    80 Mb/s

    5

    A network administrator notices that some newly installed

    Ethernet cabling is carrying corrupt and distorted data signals.

    The new cabling was installed in the ceiling close to fluorescent

    lights and electrical equipment. Which two factors may

    interfere with the copper cabling and result in signal distortion

    and data corruption? (Choose two.)

    RFI   *

    signal attenuation

    crosstalk

    EMI *

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    extended length of cabling

    7

    What is the purpose of the FCS field in a frame?

    to obtain the MAC address of the sending node

    to verify the logical address of the sending node

    to compute the CRC header for the data field

    to determine if errors occurred in the transmission and

    reception*

    8

    As data travels on the media in a stream of 1s and 0s how does

    a receiving node identify the beginning and end of a frame? 

    The transmitting node sends an out-of-band signal to the receiver

    about the beginning of the frame.

    The transmitting node sends a beacon to notify that a data frame is

    attached.

    The receiving node identifies the beginning of a frame by seeing a

    physical address.

    The transmitting node inserts start and stop bits into the

    frame.*

    9

    Which statement describes signaling at the physical layer?

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    Sending the signals asynchronously means that they are

    transmitted without a clock signal.*

    Signaling is a method of converting a stream of data into a

    predefined code.

    Wireless encoding includes sending a series of clicks to delimit the

    frames.

    In signaling, a 1 always represents voltage and a 0 always

    represents the absence of voltage.

    10

    A network administrator is designing the layout of a new

    wireless network. Which three areas of concern should be

    accounted for when building a wireless network? (Choose

    three.)

    mobility options

    extensive cabling

    coverage area*

    interference*

    packet collision

    security*

    11

    What is one main characteristic of the data link layer?

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    It converts a stream of data bits into a predefined code.

    It shields the upper layer protocol from being aware of the

    physical medium to be used in the communication.*

    It accepts Layer 3 packets and decides the path by which to

    forward a frame to a host on a remote network.

    It generates the electrical or optical signals that represent the 1 and

    0 on the media.

    12

    What is one advantage of using fiber optic cabling rather than

    copper cabling?

    It is easier to terminate and install than copper cabling.

    It is able to be installed around sharp bends.

    It is usually cheaper than copper cabling.

    It is able to carry signals much farther than copper cabling.*

    13

    Fill in the blank.

    What acronym is used to reference the data link sublayer that

    identifies the network layer protocol encapsulated in the frame?

    “LLC”

    14

    Why are two strands of fiber used for a single fiber optic

    connection?

    They allow for full-duplex connectivity.*

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    They prevent crosstalk from causing interference on the

    connection.

    They increase the speed at which the data can travel.

    The two strands allow the data to travel for longer distances

    without degrading.

    15

    Refer to the exhibit. The PC is connected to the console port of 

    the switch. All the other connections are made throughFastEthernet links. Which types of UTP cables can be used to

    connect the devices?  

    1 – crossover, 2 – rollover, 3 – straight-through

    1 – crossover, 2 – straight-through, 3 – rollover

    1 – rollover, 2 – straight-through, 3 – crossover*

    1 – rollover, 2 – crossover, 3 – straight-through

    16

    What is true concerning physical and logical topologies?

    Physical topologies display the IP addressing scheme of each

    network.

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    Logical topologies determine the media access control method

    used.*

    Physical topologies are concerned with how a network transfers

    frames.

    The logical topology is always the same as the physical topology.

    17

    Fill in the blank.

    The term “Bandwidth” indicates the capacity of a medium to carry

    data and it is typically measured in kilobits per second (kb/s) or

    megabits per second (Mb/s).

    18

    Refer to the exhibit. What is wrong with the displayed

    termination?

    The untwisted length of each wire is too long.*

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    The wires are too thick for the connector that is used.

    The jack used is an RJ-11 connector instead of an RJ-45 connector.

    The cable is not shielded.

    19

    Fill in the blank with a number.10,000,000,000 b/s can also be written as “10” Gb/s.

    20

    What are two characteristics of 802.11 wireless networks?

    (Choose two.)

    Collisions can exist in the networks. *

    They are collision-free networks.

    They use CSMA/CD technology.

    Stations can transmit at any time.

    They use CSMA/CA technology.*

    21

    A network administrator is required to upgrade wireless access

    to end users in a building. To provide data rates up to 1.3 Gb/s

    and still be backward compatible with older devices, which

    wireless standard should be implemented?

    802.11n

    802.11ac*

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    802.11g

    802.11b

    22

    How is the magnetic field cancellation effect enhanced in UTP

    cables?

    by decreasing the number of wires that are used to carry data

    by increasing the thickness of the PVC sheath that encases all the

    wires

    by increasing and varying the number of twists in each wire

    pair*

    by increasing the thickness of the copper wires

     

    23

    Match the steps to the physical layer operations that occur

    when data is sent from one node and received at another

    node.

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    4 November 10, 2013

     by CCNA5.NET

     in CCNA 1 v5.0 Routing andSwitching

    answers

    CCNA 1 Chapter 4 v5.0 Exam

    Answers 2013

    ccna routing and switching

    cisco

    routing and switching

      ► Exam Result   ► CCNA Exam   ►

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  • 8/9/2019 Www Ccna5 Net Ccna 1 Chapter 4 v5 0 Exam Answers 2013

    12/13df di b PRO i A d l ? T t th HTML t PDF API

    Arturo September 21, 2014 Reply

    ¿Cual de las siguientes capas del modelo OSI es

    responsable de especificar el método de encapsulación

    utilizado para tipos específicos de medios?

    *Física

    *Capa de aplicación

    *Capa de transporte

    *Capa de enlace de datos

    Cual es la correcta?

    acob Rock September 22, 2014 Reply

    A perfect Score

    Federico September 23, 2014 Reply

    Arturo, es la capa de enlace de datos

    Ronny October 13, 2014 Reply

    En la pregunta 23 la solución corregida es:

    Paso 1

    Sin calificacion

    Comments

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  • 8/9/2019 Www Ccna5 Net Ccna 1 Chapter 4 v5 0 Exam Answers 2013

    13/13df di b PRO i

    Are you a developer? Try out the HTML to PDF API

    Paso 2

    Paso 5

    Paso 4

    Paso 3

    Name

    Email

     + two = 5

    Comment

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