CCNA 4 Routing & Switching Essentials Ver 6.0 – ITN Chapter 2 Exam Answers

CCNA 4 Chapter 2 Exam Answers

  1. Which protocol will terminate the PPP link after the exchange of data is complete?


  2. Which serial 0/0/0 interface state will be shown if no serial cable is attached to the router, but everything else has been correctly configured and turned on?

    Serial 0/0/0 is up, line protocol is up
    Serial 0/0/0 is up (looped)
    Serial 0/0/0 is up (disabled)
    Serial 0/0/0 is up, line protocol is down
    Serial 0/0/0 is down, line protocol is down*
    Serial 0/0/0 is administratively down, line protocol is down

  3. How much total bandwidth is provided by a T1 line?

    64 kb/s
    1.544 Mb/s*
    128 b/s
    43.736 Mb/s

  4. Which field marks the beginning and end of an HDLC frame?FCS
  5. In which situation would the use of PAP be preferable to the use of CHAP?

    when router resources are limited
    when multilink PPP is used
    when a network administrator prefers it because of ease of configuration
    when plain text passwords are needed to simulate login at the remote host*

  6. When configuring Multilink PPP, where is the IP address for the multilink bundle configured?

    on a physical serial interface
    on a multilink interface*
    on a physical Ethernet interface
    on a subinterface

  7. Which three are types of LCP frames used with PPP? (Choose three.)

    link-establishment frames*
    link-control frames
    link-negotiation frames
    link-termination frames*
    link-acknowledgment frames
    link-maintenance frames*

  8. Which command can be used to view the cable type that is attached to a serial interface?

    Router(config)# show ip interface brief
    Router(config)# show ip interface
    Router(config)# show interfaces
    Router(config)# show controllers*

  9. How does PPP interface with different network layer protocols?

    by using separate NCPs*
    by encoding the information field in the PPP frame
    by specifying the protocol during link establishment through LCP
    by negotiating with the network layer handler

  10. Which address is used in the Address field of a PPP frame?

    a single byte of binary 10101010
    a single byte of binary 11111111*
    a single byte of binary 00000000
    the IP address of the serial interface

  11. The exhibit displays some partial debug command output:

    Refer to the exhibit. Based on the debug command output that is shown, which statement is true of the operation of PPP.

    A PPP session was successfully established.*
    CHAP authentication failed because of an unknown hostname.
    Both PAP and CHAP authentication were attempted.
    The debug output is from router R2.

  12. The exhibit has two boxes. The first box shows the following partial command output:
    Refer to the exhibit. A network administrator is configuring the PPP link between the two routers. However, the PPP link cannot be established. Based on the partial output of the show running-config command, what is the cause of the problem?

    The usernames do not match.
    The passwords should be longer than 8 characters.
    The interface IP addresses are in different subnets.
    The passwords do not match.*

  13. A network engineer is monitoring an essential, but poor quality, PPP WAN link that periodically shuts down. An examination of the interface configurations shows that the ppp quality 90 command has been issued. What action could the engineer take to reduce the frequency with which the link shuts down?Set the DCE interface to a lower clock rate.
    Use the bandwidth command to increase the bandwidth of the link.
    Issue the command ppp quality 100.
    Issue the command ppp quality 70.*
  14. A network engineer is troubleshooting the loss of MPEG video viewing quality as MPEG video files cross a PPP WAN link. What could be causing this loss of quality?Link Quality Monitoring was not configured correctly on each interface.
    PAP authentication was misconfigured on the link interfaces.
    The clock rates configured on each serial interface do not match.
    The compress command was used when PPP was configured on the interfaces.*
  15. Which PPP option can detect links that are in a looped-back condition?

    Magic Number*

  16. A network engineer has issued the show interfaces serial 0/0/0 command on a router to examine the open NCPs on a PPP link to another router. The command output displays that the encapsulation is PPP and that the LCP is open. However, the IPV6CP NCP is not shown as open. What does the engineer need to configure to open the IPV6CP NCP on the link?

    Configure CHAP authentication on each router.
    Issue the compress predictor command on each interface on the link.
    Configure PPP multilink interfaces on each router.
    Configure an IPv6 address on each interface on the link.*

  17. Which three physical layer interfaces support PPP? (Choose three.)

    synchronous serial*
    asynchronous serial*

  18. What are three components of PPP? (Choose three.)

    HDLC-like framing*
    parallel communications
    support for LAN and WAN

  19. A laptop is connected to an AP and is associated with the connection that is labeled A. The AP is connected to a switch and is associated with the connection that is labeled B. A PC is attached to the switch. The switch is connected to router RTA. The connection of the PC, through the switch, to RTA is associated with the connection that is labeled C. RTA is connected via a serial connection to the ISP and is associated with the connection labeled D.Refer to the exhibit. What type of Layer 2 encapsulation will be used for connection D on the basis of this configuration on a newly installed router:

    RtrA(config)# interface serial0/0/0
    RtrA(config-if)# ip address
    RtrA(config-if)# no shutdown

    Frame Relay

  20. Which two statements describe a PPP connection between two Cisco routers? (Choose two.)

    LCP tests the quality of the link.*
    LCP manages compression on the link.*
    NCP terminates the link when data exchange is complete.
    With CHAP authentication, the routers exchange plain text passwords.
    Only a single NCP is allowed between the two routers.

  21. Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
    Why is the serial link between router R1 and router R2 not operational?

    The encapsulation in both routers does not match.
    The authentication type is not the same in both routers.
    The passwords are different in both routers.
    In each case the expected username is not the same as the remote router hostname.*

  22. Question as presented:
  23. Question as presented:
  24. Question as presented:
  25. Which is an advantage of using PPP on a serial link instead of HDLC?fixed-size frames
    higher speed transmission
    option for authentication*
    option for session establishment

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