Home > ICND1 – IP Routing 2

ICND1 – IP Routing 2

June 14th, 2017 in ICND1 100-105 Go to comments

Note: The ICND1 exam requires candidates to understand basic knowledge of dynamic routing protocols (RIP, EIGRP, OSPF).

Question 1

Explanation

After receiving a packet, the router will keep the source and destination IP addresses (10.1.3.3 and 10.1.2.2, respectively) while change the source MAC address (to the MAC address of its outgoing interface) and the destination MAC address (to the MAC address of the next-hop interface). Therefore when the packet leaves Router1, the source MAC address must be the MAC address of the outgoing interface of Router1 (0000.000c.0124) and the destination MAC address must be the MAC of fa0/1 of R2 (0000.000c.0123).

Question 2

Explanation

A static route with 0.0.0.0 0.0.0.0 will become a default route. The default route means: “send all traffic to this IP address”. So the default route “ip route 0.0.0.0 0.0.0.0 172.16.2.2” will send all traffic to 172.16.2.2.

Question 3

Explanation

The Administrative Distance (AD) parameter must be put at the end of the “ip route” command. The default AD is 1.

Question 4

Explanation

This router only have directly connected networks (symbolized by letter “C”) and one default route out of Serial0/0. Maybe this is a stub router with only one connection to the Headquarter or to the Internet.

Question 5

Explanation

In this topology, R2 is a stub router with only one connection to the HQ network so the best way to configure routing is to set a static route (default route) to R1.

Question 6

Explanation

Host A is in a different subnet of SW-A so SW-A does not know how to send data to host A so it needs to be assigned with a default gateway. The command to assign a default gateway to a switch is “ip default-gateway “. Please notice this command only has effect when “ip routing” is disabled on SW-A.

Question 7

Explanation

The default gateway of Host A should be the connected interface of the router, except host A is connected with a Layer 3 switch. In this case, Switch A is a pure Layer 2 switch and Switch A IP address is just for management purpose.

Question 8

Question 9

Question 10

Explanation

The administrative distance of each protocol is compared to see if that route is better or not.

Question 11

Explanation

Letter “D” is used to symbolize for EIGRP (with a default AD of 90). Letter “E” is not used for EIGRP because it has been used for Exterior Gateway Protocol (EGP) which is a obsolete routing protocol now.

Comments (55) Comments
  1. Router47
    October 22nd, 2013

    Doesn’t Sw-A in question 6 already have an address assigned to it in the topology?

    So then why would it need a default gateway to communicate with Host A?

  2. Marcel Ausan
    October 23rd, 2013

    Sw A in question 6 has an IP address which will be used only for remote management. Hence the need for an default gateway.

  3. Router47
    October 24th, 2013

    Marcel, how do you know the Sw A is being used for only for remote management?

  4. Mgmt41
    October 26th, 2013

    If the switch is NOT a layer 3 device (specifically says no routing) then the IP is just used for management. There is actually another question that asks that specific thing “What does an IP on a switch provide?” The answer is remote management.

    If it was a layer 3 switch (which, in my mind I think of a layer 3 switch as a router for purposes like this) then you could setup routing and some other features. Layer 2 is all MAC, the layer 3 address is so you can manage that switch through the SVI interface.

  5. Anonymous
    December 8th, 2013

    It seems like Question 2 have wrong answer:
    Router A still doesn’t know anything about 172.16.1.0 subnet. It must have default route to Router B. So host from subnet 172.16.1.0 can send packet to left side of picture, but they will never receive a reply. Just check it in your GNS3.
    debug ip packet on any host in 10.0.0.0 and ping it from any host from subnet 172.16.1.0.
    So, on my mind right answers are C and E.

  6. Anonymous
    December 8th, 2013

    Oh, sorry about my English…

  7. Anonymous
    December 8th, 2013

    And about answers, a mean the right one: A and E in Question 2.
    Now i should get some sleep…

  8. Val
    December 13th, 2013

    Nope, it cannot be E because you cannot enter THE SAME command on RouterA (it has to have at least a different next hop address – 172.16.2.1 in our case).

  9. Networker
    December 22nd, 2013

    @Anonymous

    While E is not the correct answer as Val pointed out, you are correct that traffic would not be routed properly, since router A has no knowledge of 172.16.1.0, so traffic would be dropped (or sent to router A’s default route).

  10. CCENT Someday
    January 31st, 2014

    Anyone,

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

    Thanks in Advance!

  11. Char007
    February 2nd, 2014

    Q2 is correct, A because it is a default route and C becuase it clearly says This will allow any host on the 172.16.1.0 network to REACH all known destinations beyond RouterA, it does not say the packet will be replied but definetely will reach the destination.

  12. kammal
    February 16th, 2014

    qustion 3 need more explanation why D Not B is it becouse AD defoult 5 or ?

  13. Eddie
    February 19th, 2014

    @kammel Q3 is correct with D because the default administrative distance for a static route is 1 and it is clearly asking for a nondefault administrative distance. In this case given the options is 5.

    -AD-
    Static: 1
    EIGRP: 90
    OSPF: 110
    RIP: 120

  14. bemybeach
    March 28th, 2014

    It seems like Question 4 needs more explanation, I still do not see why this has to be a Stub Router and not an HQ or WAN?

  15. shyamal
    April 12th, 2014

    Question 5 – Can someone explain me. Becuase I understand need to have both side to talk and that why I think answer
    A. router1(config)#ip route 10.89.0.0 255.255.240.0 10.89.16.2
    B. router2(config)#ip route 10.89.3.0 255.255.0.0 10.89.16.2
    Because router 1 also have to have a route to send packet back to other network.

    May be I am wrong. I understand that both router need the routing information regarding the networks.

    Harsh

  16. shyamal
    April 12th, 2014

    For question 2 I donot think we need to enter
    E. The same command needs to be entered on RouterA so that hosts on the 172.16.1.0 network can reach network 10.0.0.0.
    Becuase this network is on RouterB and this router needed to know where to go if 172.16.1.0 network trys to go to any other network beside 172.16.1.0.

    Shyamal

  17. David B
    April 20th, 2014

    Question 4 is also confusing, isn’t 0.0.0.0 default route if no other routes exist?

  18. David B
    April 20th, 2014

    can someone explain why question 4 is answer D? a quick google search says Remote stub router is an EIGRP concept also covered in ICND2, so NOT an ICND1 topic, i believe that answer should be B

  19. Mustafa
    April 22nd, 2014

    Q1, please advise me the packet is going out from R1 output so it will use its MAC add of fa0/1 then destination MAC add. should be the switch input port actually this should be replaced with hub not switch because each port in switch own a different MAC add. kindly 9TUT correct me if I am mistake, then when the packet leave this switch it will leave from different port which means different MAC source add. all the way to fa0/1 of R2.
    Anyone agree ??????

  20. fez
    April 24th, 2014

    Passed my 100-101 exam today and question 2,3,6 were there.. all the best

  21. John
    April 27th, 2014

    Mustafa, the switch input port is looking at the output of R1, therefore R1 MAC address is learned by that switch port (directly connected). Same with R2 on the other side. So if R1 Sends with MAC of R2 SW knows it is on the other (directly connected) port and sends it out…. see what I mean.

  22. Daed
    May 2nd, 2014

    Took test today. Questions 1, 2, 3, 5, 7 were there.

  23. Sby
    May 16th, 2014

    On Q5, the quad 0 quad 0 route is definitely the best answer, but why would the static route not be pointing to the ip of the exit interface on R2 (10.89.16.2)?

    D. router2(config)#ip route 0.0.0.0 0.0.0.0 10.89.16.1

  24. Jose
    July 7th, 2014

    can somebody explain to me the question 6?

  25. Jose
    July 7th, 2014

    I mean the question three,, since the administrative distance is 1 why is the last option selected as the right one. it’s a bit confusing

  26. AK
    July 18th, 2014

    Question 3: Please check the answer
    Your explanation and your answer don’t match. I think the answer is B
    “The Administrative Distance (AD) parameter must be put at the end of the “ip route” command. The default AD is 1.”

  27. AK
    July 18th, 2014

    Please share more questions if you took 100-101 recently. I checked all these answers are right.

  28. tylerd
    July 19th, 2014

    hi, in question 5, to establish connection between regional office and corporate, answer A must be done to or not?? i get the answer d, but what about answer a??

  29. @John
    August 18th, 2014

    John, Many thanks dude 🙂 got it.

  30. Norna
    November 9th, 2014

    People should careful when you are giving the answer for Q3 , read careful “nodefaul ” so it won’t be 1 as we know that AD for statistic is 1. D is correct

  31. Norna
    November 9th, 2014

    People should be careful when you are giving the answer for Q3 , read careful “non default ” so it won’t be 1 as we know that AD for statistic is 1. D is correct

  32. Yahia Tariq
    November 22nd, 2014

    Questions 2-5-7 were in exam on 20/11/2014, more than 45 questions were from 9tut !

  33. Mohamed
    January 4th, 2015

    Hey @Yahia, How many lab sims have you had? I plan on taking Monday the Janaury 12th.

  34. Ben
    January 20th, 2015

    For Q3 …. why is the answer not B? the AD for a static route is 1. the explanation also states that to be 1?

  35. Techgique
    January 26th, 2015

    @ Ben You need to carefully read these because skimming questions will drop your score quickly when you try to take the CCENT or CCNA exam. They will put crafty questions in there that will be right or wrong based on a simple keyword. In the example of Q3:

    “…Router1 to network 192.168.202.0/24 with a NONDEFAULT administrative distance?”

    9tut makes the point that 1 is the static AD, so knowing that, you should assume that B cannot be correct because it uses the default and not the NONDEFAULT AD that the question asks for.

  36. DB1968
    March 31st, 2015

    OK, not understanding Q6, set tge config up in Packet Tracer and i can ping both ways without using the ip default-gateway on SW-A

  37. Rajitha.kbsl
    April 3rd, 2015

    @DB1968, You can ping between RT n SW , but you can ping between RT n PC..

  38. Rajitha.kbsl
    April 3rd, 2015

    @DB1968, sry for the wrong comment,

    You can ping between RT-A n SW-A , but you can ping between SW-A n HOST-A..

  39. Ronny
    April 4th, 2015

    Hi Guys , just passed the ICND1 with 100% score, most questions are the same as 9tut. Thanks 9tut!!

  40. Anonymous
    April 15th, 2015

    just passed the exam Q3 and Q6 were int the exam

  41. G-10
    April 26th, 2015

    Q 3 in exam

  42. test
    May 5th, 2015

    test sorry just wanna check if all these comments are real

  43. Anonymous
    May 15th, 2015

    kindly send me the latest dumps

  44. Ken
    June 15th, 2015

    So I’m confused with question 6. The answer is to “default gateway on SW-A”. How can you configure a default gateway on a switch unless it was for a management port? Now, maybe if it was reworded to “default gateway TO SW-A” then it would make sense.

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    June 26th, 2015

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  46. test
    June 30th, 2015

    real?

  47. Goose
    July 10th, 2015

    Q2 A & E

  48. 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

  49. anon_premium
    July 31st, 2015

    Why not option A in Q5?
    Is it because we need to look less at the network ip addresses?

  50. Compaq
    July 31st, 2015

    Also I am not able to comprehend Q4?
    Is it stub router because it has less number of connected routes as it is given,it’s a large enterprise

  51. Donal
    September 19th, 2015

    In question 5 looking at the corporate HQ network is 10.89.3.0/16 a valid network address? With a /16 subnet mask the first 16 bits would be network bits whereas the last 16 would be host bits meaning the network address is 10.89.0.0/16 and broadcast would be 10.89.255.255/16 with all addresses in between being host addresses, 2^16-2 which is 65,534 of them, this is confusing me can someone help out please, cheers

  52. ras d
    November 2nd, 2015

    is this damp still valid? please help

  53. ras d
    November 2nd, 2015

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  54. Tabo
    June 17th, 2016

    Dears, is there any question related to ACL in ICND-1 ? please comment

  55. Anonymous
    August 18th, 2017

    Hi, Q9, why isn’t it prefix?