Home > ICND1 – OSPF Questions

ICND1 – OSPF Questions

June 13th, 2017 in ICND1 100-105 Go to comments

Note: If you are not sure about OSPF, please read my OSPF tutorial first.

Question 1

Question 2

Question 3


Answer A and C are obviously correct. For answer E, it allows extensive control of routing updates via Link-State Advertisement (LSA). Administrators can filter these LSAs to meet their requirements easily.

Question 4


A is not correct because the backbone area of OSPF is always Area 0.
B is not correct because R1 or R3 must be the DR or BDR -> it has to establish neighbor adjacency with the other.
C is not correct because OSPF neighbor relationship is not established based on static routing. It uses multicast address to establish OSPF neighbor relationship.
E is not correct because configure EIGRP on these routers (with a lower administrative distance) will force these routers to run EIGRP, not OSPF.

D and F are correct because these entries must match on neighboring routers:

Hello and dead intervals
Area ID (Area 0 in this case)
– Authentication password
– Stub area flag

Question 5

Question 6


The highest IP address of all loopback interfaces will be chosen -> Loopback 0 will be chosen as the router ID.

Question 7


OSPF uses a metric referred to as cost. The cost of the entire path is the sum of the costs of the outgoing interfaces along the path. Cisco uses a simple formula to calculate OSPF cost:

OSPF cost = 108 / Bandwidth (bit)

Therefore, a 100 Mbps FastEthernet interface will have the cost of 108 / 100,000,000 (bps) = 1

Note: Cost for interfaces with bandwidth equal or larger than 10^8 bps is normalized to 1 so a 1Gbps interface will also have OSPF cost of 1.

For “O /30 [110/128] via, 00:35:36, Serial0″ line, the first number in the brackets is the administrative distance of the information source; the second number is the metric for the route -> In this case the second number is the OSPF cost.

Question 8


There are 2 segments on the topology above which are separated by Corp-3 router. Each segment will have a DR so we have 2 DRs.

To select which router will become DR they will compare their router-IDs. The router with highest (best) router-ID will become DR. The router-ID is chosen in the order below:

+ The highest IP address assigned to a loopback (logical) interface.

+ If a loopback interface is not defined, the highest IP address of all active router’s physical interfaces will be chosen.

In this question, the IP addresses of loopback interfaces are not mentioned so we will consider IP addresses of all active router’s physical interfaces. Router Corp-4 ( & Branch-2 ( have highest “active” IP addresses so they will become DRs.

Question 9

Question 10

Comments (76) Comments
  1. Jitterbox
    October 23rd, 2013

    Question 4 is incorrect i’m fairly certain. The diagram shows they they are all in the same area.

  2. Mike
    October 23rd, 2013

    Correct Question 4 is wrong

  3. jp.ccna
    October 24th, 2013

    Question 4 is correct. The answer that is causing confusion states that the routers are CONFIGURED in different areas. Technically it would have been better had they left the AREA 0 off the topology diagram, however it is just that, a diagram.
    This is a popular confusing tactic for questions on Cisco certs. They grate against common sense sometimes and little keywords like “configured” make certain answers the best answer for a given question.

  4. Shaun L
    November 8th, 2013

    Please put explanation on Q:5. Thanks.

  5. Dav
    November 13th, 2013

    I passed Icnd1 last friday and I encountered one question concerning syntaxe command for configuration of a network in OSPF.
    Answer was :
    router ospf 1
    network 10.0.x.x area 0


  6. Tere
    November 22nd, 2013

    Mike, I think the same with tha area, but so, what is the correct answer? D and?

  7. Tere
    November 22nd, 2013

    the* oops 😛

  8. Trunks
    November 25th, 2013

    Today on exam I had a question along the lines of “What are the advantages of ospf routers being in the same area? Choose two” it caught me off guard.

  9. revul93
    November 30th, 2013

    @Shayn L:
    Please put explanation on Q:5. Thanks

    The OSPF routers address all hello paclet with a which is a multicast address .

  10. kjk
    December 3rd, 2013

    Q:5–router messages are multicast in OSPF using the addresss in point to point networks.

    In multiaccess networks, DRs use to send out LSAs to all DROthers. DROthers send messages to the DR using This process cuts down on multiple adjacencies and network traffic in the multiaccess nvironment.

  11. h@EL
    December 9th, 2013

    Question 5

    Which address are OSPF hello packets addressed to on point-to-point networks?


    Answer: A


    In point to point networks the IP multicast address is used to send Hello packets to all OSPF routers on a network segment.
    In multiaccess networks the IP multicast address is used to send OSPF routing information to designated routers on a network segment.

  12. max
    January 19th, 2014

    Trunks, it is very simple. Well, a single area ospf makes the configuration more simple. In other words, you have a more complex topology when you need to configure multiple areas. I think it is the only advantage of ospf routers in the same area.

  13. CCENT someday
    January 20th, 2014

    OSPF Troubleshooting:


    show ip ospf neighbor
    show ip int brief
    sho ip osfp int brief
    show ip ospf

  14. CCENT Someday
    January 31st, 2014


    I plan on taking exam next week. What other sims/labs did you get besides the OSPF 6 router?

    Thanks in Advance!

  15. Njabulo
    March 6th, 2014

    I wrote my exam on the 4th of march using this site.——-got 947 out of 1000

  16. Anderson
    March 6th, 2014

    DR electin isn’t suppose to be made in multilink OSPF?

    i know there is a switch in the diagran opening the possibility to add another router, but still only 2 routers in that segment.

    can someone advise?

  17. JamesK
    April 8th, 2014

    @Jitterbox “Question 4 is incorrect i’m fairly certain. The diagram shows they they are all in the same area.”

    They’re supposed to be in the same area, but one router is configured for the wrong area.

  18. sami
    April 26th, 2014

    hi all
    subscribe to that channel http://www.youtube.com/user/Joynetworks for free

  19. Manohar Tn
    May 16th, 2014

    Got 986/1000 Marks, {5/16/2014} 50 Questions, Ospf Sim, Security simlet, and Router and switch Simlet Was also there…..All questions From 9tut. and Examcollections…..Now Heading For Icnd2 And Blogging…..

    For Any Help.
    Manohar Tn
    Website: http://www.techlinko.com
    G+ : https://plus.google.com/u/0/+ManoharTN9/

  20. Wish me luck
    August 3rd, 2014

    Just a small correction. In question 7, in the explanation, line speeds should be measured in bits not bytes.

  21. 9tut
    August 5th, 2014

    @Wish me luck: Thanks for your detection. We have just updated it! Best wishes to you in your exam!

  22. Gabbie
    October 17th, 2014

    Hi everyone! I’m taking the ICND1 this Monday,I’m a bit nervous tho,any dumps would be appreciated! gfedejko@yahoo.com

  23. Anonymous
    October 30th, 2014

    Hey guys, I’m taking the ICND1 next week, can I please have the dumps for this exam it will be greatly appreciated! bigb0002@yahoo.com

  24. MafeCo
    November 10th, 2014

    Hi all, I presented the ICND1 exam on Oct 31st, 947/1000 marks. For OSPF I got this new question related with the configuration to include all interfaces, options were something like:
    network area 1
    network area 1
    network area 1
    network area 1

    network area 1 is the correct one.


    Basically is the same thing as in ACL when “permit/deny” means permit’deny any. The command “network 255.255.255 area x” enables OSPF on ALL interfaces. Should you use it? Well, as best practices and in real life no, but it depends like in a exam maybe you have a question saying enable OSPF on all interfaces using only one command.

  25. Ron
    November 20th, 2014

    I did the exam yesterday and 9tut.net helped me a lot. Thanks a lot for the questions and the comments. You guys are doing a fantastic job. Keep it up 🙂

  26. Ron
    November 20th, 2014

    I got 974/1000 on the exam. I got an OSPF sim about hello and dead interval, Network security sim with switch and router and almost everything I practiced on 9tut.net.

  27. Yahia Tariq
    November 22nd, 2014

    Question 1 were in exam on 20/11/2014, more than 45 questions were from 9tut !

  28. Anon
    November 25th, 2014

    I don’t understand question 8. Two segments? Why are there two segments?

    Annoyingly the DR/BDR concept is not really mentioned in the ICND1 official book.

  29. Ayoob Eshaq
    December 12th, 2014

    @ Anon
    There are two segments because the network is separated with a serial connection (point-to-point) connection between Corp-3 and Branch-1. There’s no DR and BDR election in point-to-point links. It only occurs in a multiaccess network. Therefore, two DRs are elected (one for the 10.1.x.x segment and another one for the 10.2.x.x segment).
    show ip ospf neighbors DOES NOT show the routers beyond the point-to-point connection.

    Tested it on packet tracer.

  30. Islam Is the Best
    January 6th, 2015

    Wish me luck guys. I take my ICND1 Next Monday.

  31. Adam
    January 7th, 2015

    Thanks guys,all this is awesome-i will be taking my ccna exam in 3 weeks, wish me luck..

  32. guy
    January 20th, 2015

    I have a quick question. Either in ICND1 or ICND2, are any of these sim questions straight-up configuration simulations? Like in a practice lab where you have to configure EIGRP on 5 routers etc, or are they “get some information via show commands and choose some multiple choice answers” questions? Does that make sense? Because I have been racking my brain trying to remember each and every command, which of course is never a bad thing but I also dont want to be losing sleep trying to remember some obscure ip command.

  33. Vic
    January 25th, 2015

    @Anderson. DR election is made at multi-access however, it is not at point to point.
    The easy way to know if it is multi or point, is by looking at the cables. If the router is connected
    To another router with a serial cable, it is point to point. If it is ethernet, then is multi-access.

  34. Anonymous
    January 30th, 2015

    Took the ICND1 today, there was a new question about OSPF not on this site. Something to the effect of what is the advantage of running single area OSPF vs multiple area OSPF, 2 choices. Study OSPF and you will be good.

  35. jmathenge
    February 11th, 2015

    Hey everyone, I’m scheduled to take ICND1 on 19th this month, can someone share some dumps for this exam, thank you in advance. jmathenge14@yahoo.com

  36. lazaro
    February 11th, 2015

    please share with me any icnd1 dump mas.lazaro@yahoo.com

  37. Kc
    March 3rd, 2015

    Hello everyone! Great information! I take my icnd1 test the 16th of this month (March). If someone could email me the dumps at hots76@yahoo.com , I’d highly appreciate it.

  38. neptune
    March 9th, 2015

    I am not a big fan of question 4, answers show D, F correct – answer F “r1 and r3 are configured
    in different areas” the picture just totally messes me up – it shows the diagram of all three routers in area 0.

  39. Adam
    March 24th, 2015

    Question 8 isn’t covered in the ICND1 book (I’ve just re-read the entire chapter). Does anyone know if this is a CCNA question posted in error?

  40. Ahmed
    March 28th, 2015

    q1, 5 in icnd1 exam

  41. missg
    April 25th, 2015

    Can anyone send me ICND1 dumps.

  42. amigo
    May 3rd, 2015

    I will be taking exam soon please send me dumps ilkayakgul2002@yahoo.com

  43. Anonymous
    May 4th, 2015

    i’m taking it today 🙂

  44. Anonymous
    May 16th, 2015

    I will be taking exam soon please send me dumps gmboya12@yahoo.com please !!plEASE

  45. wadah
    May 28th, 2015

    please send me valid dumps.

  46. anonimo
    June 16th, 2015

    just took my icnd1 this morning, passed with a 940+, all ?s from susan/ question #6 my answer was router-id, although was an option. fyi- understand the questions, cisco will change the numbers and wording on half of the questions….

  47. Anonymous
    June 26th, 2015

    get free dumps dumps from this link
    wurl. cc/dumps

  48. bilijim
    July 9th, 2015

    please i need more clarification on on question 8, am thinking and should be the answer. pls i need help on this for betterr understanding

  49. 9tut
    July 13th, 2015

    @all: We had to move all the questions and answers out of 9tut. We can only keep the explanation. You can download the questions and answers at: https://mega.co.nz/#!oIdESYbD!yyu33vygrfKPy4rcmcbV6qW2fxINNoTokuDM3CjA_og

  50. ali
    July 13th, 2015

    y the question r been removed it was such a good site and now its confusing

  51. Hemal
    July 24th, 2015

    @9tut team,

    Please add below question in ospf section.

    What are two benefits of using a single OSPF area network design? (Choose two)
    A. It is less CPU intensive for routers in the single area.
    B. It reduces the types of LSAs that are generated.
    C. It removes the need for virtual links.
    D. It increases LSA response times.
    E. It reduces the number of required OSPF neighbor adjacencies.
    Answer: B C

    I had this question in exam today, Correct answers are B & C. I scored 100% in all sections except from switching. I choose B & C . so it has to be correct.

    Thanks for your wonderful efforts. Owe you a lot.

  52. Hemal
    July 24th, 2015

    @9 tut team.

    I have another ospf question as per below.

    How to configure network with single OSPF area ?

    Answer was

    Router ospf1
    network area 0

    Network is correct but wording might be different and i cant remember other options but above mentioned is the correct answer.

    Just keep an eye on this one . When some1 else posts full options please update question in data base.


  53. Surferdude
    July 24th, 2015

    Thx Hemal

  54. guest
    September 16th, 2015

    was ospfv2 and v3 on it?

  55. MeDa
    October 28th, 2015

    all I see are answers, does anyone know how to get the questions, please

  56. furmal
    November 11th, 2015

    can any one tell me where to download packet tracer , i upgraded my windows to 10 and my already installed packet tracer is giving me all sort of error. also wish me luck guys my icnd 2 test is in 1 month and i am not doing well :s

  57. AKR
    March 1st, 2016

    Where and how may I get the questions?
    Explanation is given but what is the question?
    Any suggestion or help in this regard?

  58. AKR
    March 1st, 2016

    Hello 9tut operation folks:
    How may I get OSPF Neighbor Sim and OSPF Sim?

  59. waseem
    March 19th, 2016

    Hello All, thanks for the questions link but the file is from July 2015, are these questions valid now? in March 2016?
    All 9tut questions are old dated?

  60. 9tut
    March 23rd, 2016

    @waseem: Please visit this link for newest questions: http://www.9tut.net/icnd1-2-questions-and-answers

  61. mary
    April 11th, 2016

    Always this question are on test ? Please let me know couse i must take the eaxam tomorrow

  62. Hola
    May 12th, 2016

    Hello mary, i will take the exam tomorrow and regarding your question i really hope so.

  63. TAB0
    June 12th, 2016

    Hello friends. can some body help me to give me the valid sumps for ICND-1 I have my exam next week please.
    tariqmohammad dot icc at gmail dot com

  64. Suntzu
    June 21st, 2016

    Hey, 9tut, the link you posted on March23 2016 does not currently work? Are there new questions for 2016? If so, can you reload the link please.

  65. Anonymous
    February 7th, 2017

    Is OSPF in the topics?

  66. Anonymous
    February 7th, 2017

    Is OSPF in the exam topics for ICND 100-105?

  67. Anonymous
    February 16th, 2017
  68. Naeem
    April 7th, 2017

    OSPF is in icnd2

  69. a
    April 17th, 2017

    is ospf in icnd1 (nope)

  70. jane
    May 17th, 2017

    hi guys,
    can someone send me the dumps according the answers of this site for ICND1 and other material???? please please please. I really neeeeeeeeeeeeeeeed it. heeeeelp me please . I’m sad 🙁 🙁

    my email address is jane_woken52 @ yahoo.com (no spaces before and after @ sign)

    🙁 🙁

  71. Sam
    June 8th, 2017

    Hi guys,
    does anyone know about the new dumps, any help?

  72. ResAK
    July 20th, 2017

    Why are these kind of questions if all this is part of the ICND2 exam?

  73. Ciscoaddicted
    July 20th, 2017

    Is OSPF really part of the new CCENT? Should not be only RIPv2?

  74. Brandt
    July 20th, 2017

    According to official Cisco statement OSPF topic is a part of ICND2, not ICND1.

  75. KL
    August 23rd, 2017

    What are two benefits of using a single OSPF area network design? (Choose two)
    A. It is less CPU intensive for routers in the single area.
    B. It reduces the types of LSAs that are generated.
    C. It removes the need for virtual links.
    D. It increases LSA response times.
    E. It reduces the number of required OSPF neighbor adjacencies.
    Answer: B C

    here is my research

    LSA tables are:
    Router LSA
    Network LSA
    Summary LSA
    Summary ASBR LSA ( if single area, deleted)
    AS external LAA ( if single area, deleted)
    Not-so-stubby area LSA
    External attribute LSA for BGP.

    all areas in the OSPF AS must be physically connected to area 0, if not possible, then need to use Virtual Link. if all routers are in the single area (only can be in area 0), then Virtual Link is not needed.