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CCNA – WAN

April 15th, 2011 Go to comments

Here you will find answers to WAN Questions

If you are not sure about Frame Relay, please read my Frame Relay tutorial.

Question 1

The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router. Which of the following statements is true concerning this command?

A: This command should be executed from the global configuration mode.

B: The IP address 10.121.16.8 is the local router port used to forward data.

C: 102 is the remote DLCI that will receive the information.

D: This command is required for all Frame Relay configurations.

E: The broadcast option allows packets, such as RIP updates, to be forwarded across the PVC.

 

Correct Answers: E

Explanation:

The command frame-relay map ip 10.121.16.8 102 broadcast means to mapping the distal IP 10.121.16.8 102 to the local DLCI 102. When the “broadcast” keyword is included, it turns Frame Relay network as a broadcast network, which can forward broadcasts

Question 2

Refer to the exhibit. Which statement describes DLCI 17?

wandlciunderstand1.jpg

A: DLCI 17 describes the ISDN circuit between R2 and R3.

B: DLCI 17 describes a PVC on R2. It cannot be used on R3 or R1.

C: DLCI 17 is the Layer 2 address used by R2 to describe a PVC to R3.

D: DLCI 17 describes the dial-up circuit from R2 and R3 to the service provider.

 

Correct Answers: C

Explanation:

DLCI stands for Data Link Connection Identifier. DLCI values are used on Frame Relay interfaces to distinguish between different virtual circuits. DLCIs have local significance because the identifier references the point between the local router and the local Frame Relay switch to which the DLCI is connected.

Question 3

A default Frame Relay WAN is classified as what type of physical network?

A: point-to-point

B: broadcast multi-access

C: nonbroadcast multi-access

D: nonbroadcast multipoint

E: broadcast point-to-multipoint

 

Correct Answer: C

Explanation:

Non-Broadcast Multi-Access (NBMA) networks are types such as Frame Relay, X.25, and Asynchronous Transfer Mode (ATM). These networks allow for multi-access, but have no broadcast ability like Ethernet

Question 4

Which of the following are key characteristics of PPP? (Choose three.)

A: can be used over analog circuits

B: maps Layer 2 to Layer 3 address

C: encapsulates several routed protocols

D: supports IP only

E: provides error correction

 

Correct Answers: A C E

Explanation

Below is some more information about PPP:

PPP (Point-to-Point Protocol) allows authentication such as Password Authentication Protocol (PAP) and Challenge Handshake Authentication Protocol (CHAP) and multilink connections (allow several separate physical paths to appear to be one logical path at layer 3) and can be run over asynchronous and synchronous links.

PPP can work with numerous network layer protocols, including Internet Protocol (IP), Novell’s Internetwork Packet Exchange (IPX), NBF and AppleTalk.

PPP only supports error detection, not error correction so answer E should be understood as “provides error detection”. It is a mistake of this question.

Question 5

Which three Layer 2 encapsulation types would be used on a WAN rather than a LAN? (Choose three)

A: HDLC

B: Ethernet

C: Token Ring

D: PPP

E: FDDI

F: Frame Relay

 

Correct Answer: A D F

Question 6

Refer to the exhibit. What is the meaning of the term dynamic as displayed in the output of the show frame-relay map command shown?

wandlciunderstand2.jpg

A: The Serial0/0 interface is passing traffic.

B: The DLCI 100 was dynamically allocated by the router

C: The Serial0/0 interface acquired the IP address of 172.16.3.1 from a DHCP server

D: The DLCI 100 will be dynamically changed as required to adapt to changes in the Frame Relay cloud

E: The mapping between DLCI 100 and the end station IP address 172.16.3.1 was learned through Inverse ARP

 

Correct Answer: E

Explanation

The term dynamic indicates that the DLCI number and the remote router IP address 172.16.3.1 are learned via the Inverse ARP process.

Inverse ARP is a technique by which dynamic mappings are constructed in a network, allowing a device such as a router to locate the logical network address and associate it with a permanent virtual circuit (PVC).

Question 7

Which of the following describes the roles of devices in a WAN? (Choose three.)

A: A CSU/DSU terminates a digital local loop

B: A modem terminates a digital local loop

C: A CSU/DSU terminates an analog local loop

D: A modem terminates an analog local loop

E: A router is commonly considered a DTE device

F: A router is commonly considered a DCE device

Correct Answers: A D E

Explanation

The idea behind a WAN is to be able to connect two DTE networks together through a DCE network. The network’s DCE device (includes CSU/DSU) provides clocking to the DTE-connected interface (the router’s serial interface).

wan_dlci_understand

A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device. A CSU/DSU is used between two digital lines -> A & D are correct but B & C are not correct.

For more explanation of answer D, in telephony the local loop (also referred to as a subscriber line) is the physical link or circuit that connects from the demarcation point of the customer premises to the edge of the carrier or telecommunications service provider’s network. Therefore a modem terminates an analog local loop is correct.

local_loop_modem.jpg

Question 8

How should a router that is being used in a Frame Relay network be configured to avoid split horizon issues from preventing routing updates?

A: Configure a separate sub-interface for each PVC with a unique DLCI and subnet assigned to the sub-interface

B: Configure each Frame Relay circuit as a point-to-point line to support multicast and broadcast traffic

C: Configure many sub-interfaces on the same subnet

D: Configure a single sub-interface to establish multiple PVC connections to multiple remote router interfaces

Correct Answer: A

Explanation

Look at the figure below:

wandlciunderstand5

In the figure, router R1 has two point-to-point subinterfaces. The s0.1 subinterface connects to router R3 and the s0.2 subinterface connects to router R2. Each subinterface is on a different subnet.

Question 9

What can a network administrator utilize by using PPP Layer 2 encapsulation? (Choose three.)

A: VLAN support

B: compression

C: authentication

D: sliding windows

E: multilink support

F: quality of service

 

Correct Answers: B C E

Explanation

Same as question 4

Question 10

The Frame Relay network in the diagram is not functioning properly. What is the cause of the problem?

wandlciunderstand3

A: The Gallant router has the wrong LMI type configured

B: Inverse ARP is providing the wrong PVC information to the Gallant router

C: The S3 interface of the Steele router has been configured with the frame-relay encapsulation ietf command

D: The frame-relay map statement in the Attalla router for the PVC to Steele is not correct

E: The IP address on the serial interface of the Attalla router is configured incorrectly

 

Correct Answer: D

Explanation

At Attalla router, we find a deleted status but the next map statement indicates an active status, which if for Gallant. Therefore we can deduce the map statement for the PVC from Attalla to Steele is incorrect. Incorrect DLCI assignments that are configured normally shown up as “deleted” in the frame relay maps.

Comments
Comment pages
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  1. Cesar
    October 10th, 2012

    @9tut.
    Not that I am not studying consciously besides your terrific guide 9tut. But I have been asked myself and now you, why do you publish 95% of the questions?. Why don’t you post 100%?. Thanks.

  2. @MRPARAB
    October 21st, 2012

    Has some bad luck with ACL2 Simulation and lot many questions from frame Relay .
    EIGRP SIM is similar to 9TUT,Switch is also similar.
    Need to study more .Next attempt in december 2012.

  3. @MRPARAB
    October 21st, 2012

    Respect 9TUT

  4. @MRPARAB
    October 21st, 2012

    Hi All.
    What are the tips to answer the exam in second attempt,have got 762/1000 in todays attempt.

  5. @MRPARAB
    October 21st, 2012

    @k@¥.t€£047
    Dont ignore WAN ,lots of questions,
    I had missed most of them

  6. AhmedCCNA
    October 24th, 2012

    Just confim to those who are hesistant and looking for more dumps.
    Just passed today with 986/1000. thanks to 9tut for the labs and question. i was tested with with ACL2, VTP (with five questions) and EIRGP, four drag and drop questions. please try to read all the questions in 9tut and practice the labs. thanks.

    Guys, please advise me which course i take next and tell me the reason you chose.

  7. ANITA
    October 26th, 2012

    I’ll give CCNA exam in first week of November..
    please contact me who recently passed CCNA exam or planning to give CCNA exam…
    please tell me which dump is good and sims…

    er.anita.annu@gmail.com

  8. ANY ONE ANSWER PLEASE
    November 5th, 2012

    I HAVE A DOUBT… CAN ANY PASSED ENGINEER PLEASE ANSWER IT ?

    IN THE CCNA EXAM, CAN WE SKIP ANY UNKNOWN ANSWER ? OR DO WE HAVE TO ANSWER ALL FROM 1 TO 50 QUESTIONS CONTINUOSLY WITHOUT SKIP ?

    THANKS

  9. moss
    November 6th, 2012

    you have to answer 1 to 50 continuosly.

  10. Newbie!
    November 9th, 2012

    It has become necessary to configure an existing serial interface to accept a second Frame Relay virtual circuit. Which of the following procedures are required to accomplish this task? (Choose three.)
    A. Remove the IP address from the physical interface.
    B. Encapsulate the physical interface with multipoint PPP.
    C. Create the virtual interfaces with the interface command.
    D. Configure each subinterface with its own IP address.
    E. Disable split horizon to prevent routing loops between the subinterface networks.
    F. Configure static Frame Relay map entries for each subinterface network.

    Answer to different dump
    BCD
    ACD
    DEF

    Which of the three answer is true?

  11. tamil.
    November 9th, 2012

    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
    A.
    show framerelay map
    B.
    show framerelay lmi
    C.
    show inter serial
    D.
    show framerelay pvc
    Correct answer: A
    pls..can any one explain

  12. fathy
    November 11th, 2012

    q2 & q7 was in my exam 10-11-2012

  13. ashulala
    November 20th, 2012

    plz everyone ,if you have a latest DUMP and .vce software please …send me as soon as possible….thx in advance
    ashenafi_tmariam@yahoo.com

  14. haR
    November 24th, 2012

    hani_2012_rad@yahoo.com
    after 4 days my exams

  15. Dinesh Kumar
    November 28th, 2012

    @newbie answer is ACD

  16. Deeznutz
    November 28th, 2012

    @Anyone and Everyone
    I need to purchase some lab equipment for my CCNA / CCNP. What would you suggest? how many routers switches, etc. and models. I have about 500$ to work with.

  17. Albert
    November 29th, 2012

    can someone please send me the latest dump?
    sc.rpion13@hotmail.com

  18. Anonymous
    December 9th, 2012

    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
    A.
    show framerelay map
    B.
    show framerelay lmi
    C.
    show inter serial
    D.
    show framerelay pvc
    Correct answer: A
    Read http://www.mordor.org/CISCO/DOC_ROOT/univercd/cc/td/doc/cisintwk/itg_v1/itg_fmrl.htm for the answer

    Regards

  19. Ccrysh
    December 10th, 2012

    @anonymous @cyrax
    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
    A. show framerelay map
    B.show framerelay lmi
    C.show inter serial
    D.show framerelay pvc

    Answer is B —>because lmi shows the cisco type or ietf….(reference todd lamle IOS commands Study Guide)

  20. Ccrysh
    December 10th, 2012

    @anonymous @cyrax
    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
    A. show framerelay map
    B.show framerelay lmi
    C.show inter serial
    D.show framerelay pvc

    Option A Shows The DLCI number And IP address..
    So,
    Answer is B —>because lmi shows the cisco type or ietf….(reference todd lamle IOS commands Study Guide)

  21. iraj
    December 10th, 2012

    hi boys ccna is good choose i have done
    u can try i have done 08-12-2012
    i am from srilanka
    iam iraj

  22. sam
    December 10th, 2012

    Correct ans is B.
    show framerelay lmi

  23. suresh
    December 10th, 2012

    @anonymous
    show frame relay lmi is correct answer it shows the 3types of management interface..show frame relay map shows only the route for ip address using layer 2 dlci number…

  24. Mostafa Nader
    December 10th, 2012

    @Anybody
    @9tut
    Whether can we use tab key to fill the full cmds??
    Also can we use shortcut cmds in exam like we use in gns3 or packet tracer??
    eg:sh run, sh ip int br, sh ip rout…
    thanks.

  25. nassar
    December 13th, 2012

    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?
    A. show framerelay map
    B.show framerelay lmi
    C.show inter serial
    D.show framerelay pvc

    A : Verify FR encapsulation type (CISCO OR IETF)
    B: Verify LMI type (CISCO OR ANSI OR Q933A)

    so, the correct answer is A

  26. TDy11
    December 13th, 2012

    TY 9tut.

    Today I have passed the CCNA. (860/825)
    50 questions 3 labs (VTP, EIGRP, ACL). 35 from 9tut.

    Also thanks a lot Brar and Sekhar (still valid from examcollection)

    Ty again 9tut

  27. udita_london
    December 16th, 2012

    dear all…
    i have a doubt in PPP… like i want configuration of PAP CHAP commands together like if pap fails den chap comes into action…

    is there any send username R pswd *** required???

  28. A.HaMMaM
    December 16th, 2012

    @udita_london:

    This command is used to apply CHAP auth. and it it fails it will be replaced by PAP
    The Command : ” Router (config-if)#ppp authentication chap pap “

  29. A.HaMMaM
    December 16th, 2012

    @udita_london:
    you should set hostname for each of the two routers connected by ppp
    and you should also configure username of R1: (the hostname of R2)
    and the username of R2: (the hostname of R1)
    and the passward should be the same in both of them

  30. A.HaMMaM
    December 16th, 2012

    @udita_london:
    configuration Commands:(connecting London router with Paris router using CHAP)

    in the first router (London):

    Hostname London
    User name Paris password CCNA

    in the second router (Paris):

    Hostname Paris
    User name London password CCNA

  31. udita_london
    December 16th, 2012

    thnx fr the info… bt
    like we do in PAP AUTHEntication

    in PARIS router
    encapsulation PPP
    PPP authentication PAP
    PPP PAP send username PARIS password CCNA

    LIKEWISE.. in PAP CHAP command… is there any requiremnt of USING following command
    PPP PAP send username PARIS password CCNA???

  32. A.HaMMaM
    December 17th, 2012

    @udita_london:

    I’m Not sure , but i think there is no requirements except in case of Client and Server ..

    take a look here : http://www.shy22.com/upfilpng/qor63787.png

  33. raj.
    December 21st, 2012

    i have doubt on qu 10

  34. beggi
    December 27th, 2012

    first, it’s important to understand what the ppp authentication pap chap command means and how it works.
    basically it means : the router will try first pap authentication ,and if it does not have any response from the other router on the other end, it will try chap .
    what that command does’t mean is :the router will try CHAP authentication if PAP fail.

    the configuration is simple ,there are two steps
    1-configure a local database for each router
    2- use the ppp authentication pap chap interface subcommande in each router
    EXEMPLE
    let say we have two router R1 and R2

    R1
    R1(config)#username R2 password cisco
    R1(config-if)#encap ppp
    R1(config-if)#ppp authentication pap chap

    R2
    R2(config)#username R1 password cisco
    R2(config-if)#encap ppp
    R2(config-if)#ppp authentication chap

    i hope it can help

  35. braincellbuster
    January 3rd, 2013

    A.Hammam: your statement to udita_london…..”This command is used to apply CHAP auth. and it it fails it will be replaced by PAP” is not correct.
    This option allows the local router to attempt a secondary authentication protocol, IF the primary fails(the first one listed) is not in use by the remote router. It doesn’t mean the second protocol will be used if the authentication FAILS via the first protocol.

  36. braincellbuster
    January 3rd, 2013

    sorry beggi….you covered that

  37. John
    January 3rd, 2013

    Is the frame-relay topic required for the CCNA exam, Please help.

  38. Andy
    January 7th, 2013

    John frame-relay is an important topic for CCNA so for sure expect some questions for the exam, at least two. Furthers questions lasvillastravel@gmail.com

  39. Greenix
    January 10th, 2013

    [20 march] goin back 4 the ccna any changes in the exam

  40. Marco
    January 12th, 2013

    Hi, could someone send the last dumps? mgiurni@gmail.com

  41. Giurni
    January 12th, 2013

    Could someone send me the last dumps? mgiurni@gmail.com Thanks

  42. someone
    January 17th, 2013

    @9tut

    im done with sekhar and brar..but i have question regarding to this one similar question but different answer.

    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?

    sekhar answer: show frame-relay lmi
    brar answer: show frame-relay map

    so what is the right one?

  43. 9tut
    January 17th, 2013

    @someone: It is “show frame-relay lmi”.

    The “show frame-relay map” command displays the current map entries and information about the connections, including encapsulation type.

    Reference: http://www.cisco.com/en/US/docs/ios/12_1/wan/command/reference/wrdfrely.html#wp1022197

  44. someone
    January 17th, 2013

    thx 9tut for clarifying..

  45. Renolph
    January 20th, 2013

    can anyone please send me latest dumps for CCNA, my email is renojefa@gmail.com thanks alot

  46. shawn
    January 23rd, 2013

    Is Frame relay part on CCNA recentry?

  47. Paolo
    January 23rd, 2013

    A lot of WAN questions in the exam.
    I did it today, Passed! thanks 9tut!!!

  48. soniaD
    January 28th, 2013

    @9tut
    this is the out put showed in the cisco website about show frame-relay map. The show lmi only shows the lmi status not the encapsulation. I would say that is not the correct answer.

    Table 29 show frame-relay map Field Descriptions

    Field
    Description
    Serial 1 (administratively down)
    Identifies a Frame Relay interface and its status (up or down).
    ip 131.108.177.177
    Destination IP address.
    dlci 177 (0xB1,0x2C10)
    DLCI that identifies the logical connection being used to reach this interface. This value is displayed in three ways: its decimal value (177), its hexadecimal value (0xB1), and its value as it would appear on the wire (0x2C10).
    static
    Indicates whether this is a static or dynamic entry.
    CISCO
    Indicates the encapsulation type for this map; either CISCO or IETF.
    TCP/IP Header Compression (inherited), passive (inherited)
    Indicates whether the TCP/IP header compression characteristics were inherited from the interface or were explicitly configured for the IP map.

  49. Rooki3
    January 31st, 2013

    Valid Que :D

    Q:1

  50. jad
    February 1st, 2013

    @9tut

    Which command allows you to verify the encapsulation type (CISCO or IETF) for a frame relay link?

    A) show frame-relay lmi
    B)Show frame-relay map

    i THINK IT WILL BE (B)

    map will show frame relay encapsulation (cisco or ietf)
    lmi show lmi type ( cisco / ansi /q9333a)

    what you think ?

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