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ICND2 – OSPF Hotspot

January 16th, 2018 in ICND2 200-105 Go to comments

[am4show have=’p2;’]

Premium Member: You can test your knowledge with these questions first via this link.

[/am4show]

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

Question

This item contains several questions that you must answer. You can view these questions by clicking on the corresponding button to the left. Changing questions can be accomplished by clicking the numbers to the left of each question. In order to complete the questions, you will need to refer to the topology.
To gain access to the topology, click on the topology button at the bottom of the screen. When you have finished viewing the topology, you can return to your questions by clicking on the Questions button to the left.

Each of the windows can be minimized by clicking on the [-]. You can also reposition a window by dragging it by the title bar.

OSPF_message.jpg

Question 1

[am4show have=’p2;’]R1 is configured with the default configuration of OSPF.

From the following list of IP addresses configured on R1, which address will the OSPF process select as the router ID?

A. 192.168.0.1
B. 172.16.1.1
C. 172.16.2.1
D. 172.16.2.225

 

Answer: A[/am4show]

Explanation

The Router ID (RID) is an IP address used to identify the router and is chosen using the following sequence:

+ 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.
+ The router ID can be manually assigned

In this case, because a loopback interface is not configured so the highest active IP address 192.168.0.1 is chosen as the router ID.

Question 2

[am4show have=’p2;’]After the network has converged, what type of messaging, if any, occurs between R3 and R4?

A. No messages are exchanged.
B. Hellos are sent every 10 seconds.
C. The full database from each router is sent every 30 seconds.
D. The routing table from each router is sent every 60 seconds.

 

Answer: B[/am4show]

Explanation

HELLO messages are used to maintain adjacent neighbors so even when the network is converged, hellos are still exchanged. On broadcast and point-to-point links, the default is 10 seconds, on NBMA the default is 30 seconds.

Although OSPF is a link-state protocol but the full database from each router is sent every 30 minutes (not seconds) -> C and D are not correct.

Question 3

[am4show have=’p2;’]To allow or prevent load balancing to network 172.16.3.0/24, which of the following commands could be used in R2? (Choose two)

A. R2(config-if)#clock rate
B. R2(config-if)#bandwidth
C. R2(config-if)#ip ospf cost
D. R2(config-if)#ip ospf priority
E. R2(config-router)#distance ospf

 

Answer: B C[/am4show]

Question 4

[am4show have=’p2;’]R1 is unable to establish an OSPF neighbor relationship with R3. What are possible reasons for this problem? (Choose two)

A. All of the routers need to be configured for backbone Area 1
B. R1 and R2 are the DR and BDR, so OSPF will not establish neighbor adjacency with R3
C. A static route has been configured from R1 to R3 and prevents the neighbor adjacency from being established.
D. The hello and dead interval timers are not set to the same values on R1 and R3
E. EIGRP is also configured on these routers with a lower administrative distance
F. R1 and R3 are configured in different areas

 

Answer: D F[/am4show]

Question 5

[am4show have=’p2;’]OSPF is configured using default classful addressing. With all routers and interfaces operational, how many networks will be in the routing table of R1 that are indicated to be learned by OSPF?

A. 2
B. 3
C. 4
D. 5
E. 6
F. 7

 

Answer: C[/am4show]

Explanation

Although OSPF is configured using default classful addressing but OSPF is a link-state routing protocol so it will always send the subnet mask of each network in their advertised routes. Therefore R1 will learn the the complete subnets. Four networks list below will be in the routing table of R1:
+ 172.16.2.64/30
+ 172.16.2.228/30
+ 172.16.2.232/30
+ 172.16.3.0/24

Note: Other networks will be learned as “Directly connected” networks (marked with letter “C”)

Comments (23) Comments
  1. Nzee
    January 17th, 2018

    can someone provide the total configuration so that this sim can be reproduced in packet tracer or GNS3? help please.

  2. ABC
    February 7th, 2018

    the following is indicated on he website “This item contains several questions that you must answer. You can view these questions by clicking on the corresponding button to the left.”

    and there is no button on the left to see the questions. only answer are shown.

  3. Cinculator
    February 13th, 2018

    Can anyone explain the answers for question 4? I don’t quite understand how you got to them.

  4. Hehe
    February 21st, 2018

    I think you’ve got wrong picture for Question 4. In that case R1 and r3 WIll never become neighbors because they don’t reside on the same link

  5. Namaste
    March 7th, 2018

    Q4 actually is not part of this hotpot. Is a separate question with exhibit R1-R2-R3 side by side in Area 0.

  6. woozie
    March 28th, 2018

    Where can i get the questions for icnd2 …i only see explanations??

  7. Terrapin
    April 1st, 2018

    Agreed, no topology button, kinda hard to answer 2 of the questions without it.

  8. Musvickeys
    April 18th, 2018

    Is there anyway to access the topology or configuration of the routers on this HSRP simulation?

  9. lj
    May 8th, 2018

    You have to join and become a member.. to see the questions.

  10. Filou
    July 2nd, 2018

    Question 4 :

    For OSPF, there are 2 scenario possible that lead 2 different neighbor relationship.

    1st scenario : 2 Routers directly connected to each other may become neighbor if :
    – They have the same Area ID, Hello Timer, Dead Interval, authentication, share the same Data-Link, same VLAN or are connected back to back through a Serial Link.

    => In this scenario, the Neighbor discovery goes up to the end of INIT-2 WAY process and the relationship is : Neighbor Adjacent.

    2nd scenario : 2 or many router having their interfaces connected to a Switch in same VLAN.

    In that case, in order to avoid too many messages going to each other and both way (particulary when the Switches inter connect more than hundred routers), an election process is involved. (All retour stay at INIT-2WAY state and finaly a D.R and BDR are elected. Each OtherRouter talk only with the D.R (this limiting the messages exchanged). Then, when all LSDB are synchronyzed among all OtherRouter and the D.R, the status is Fully Adjacent. Note : the condition to be 2WAY are the same regarding the identical parameter as Hello Timer, Dead Interval and authentication.

    Thus, according to me, in this Question, R1 cannot be neighbor with R3, the routes information will be sent via LSA messages via R2 without being neighbor.

    Kind Regards

  11. tgif
    October 25th, 2018

    is icnd2 200-105 the same as icnd2 v3

  12. Anonymous
    October 29th, 2018

    I cant get the quizzes to load. I have tried clicking “Enable Flash” and nothing happens. Is someone fixing this?

  13. HitManExp
    November 19th, 2018

    I cant get the quizzes to load.

  14. Cisco 4 ever
    November 25th, 2018

    Hi, can anyone point me to the link for the questions that relates to these answers?

  15. Anonymous
    February 24th, 2019

    hi , does anyone have free link to 200-125 recent dumps .
    please post , or mailto : {email not allowed}

  16. NCK
    March 7th, 2019

    Can i have latest 200-105 ICND 2?
    If you have it please email me.

  17. Losing-wil-2Live
    March 12th, 2019

    Guys stop begging for dumps. Use this place for mock exams and study hard. Absolutely no point in having a certification and having no real grasp the material academic and practical. Dumps are the reason the industry is flooded with paper certs that freeze at the keyboard when asked to configure a static route.

  18. Studying is for nerds
    June 11th, 2019

    I totally agree with “Losing-wil-2Live”

  19. Last minute Cram
    October 18th, 2019

    and.harrison200
    gmail.com

  20. icnd2passed854
    November 9th, 2019

    I passed ICND2 on November 4th with 854! There are 54 questions, 4 drag and drop 2 labs for me EIGRP and GRE, BGP, ACL, IP SLA, RSTP, HSRP, PPPOE Questions! I have all the labs, and the majority of the questions, I have two courses and a lot of labs to be prepare write alberthdr AT hotmail point com

  21. Anonymous
    February 2nd, 2020

    @ Filou, I was think the same thing. Thanks for the confirmation.

  22. skandel1
    February 17th, 2020

    Please add me to the premium member. purchase the plan today but still, I do not see my premium membership. I paid by Paypal. I do have an exam coming Friday scheduled. Please assist asap and give me full access. Thanks