Home > DHCP Sim

DHCP Sim

October 16th, 2016 Go to comments

Refer to the topology below and answer the questions.

Topology.jpg

Question 1

Examine the DHCP configuration between R2 and R3, R2 is configured as the DHCP server and R3 as the client. What is the reason R3 is not receiving the IP address via DHCP?

A. On R3, DHCP is not enabled on the interface that is connected to R2.
B. On R3, the interface that is connected to R2 is in shutdown condition.
C. On R2, the interface that is connected to R3 is in shutdown condition.
D. On R2, the network statement in the DHCP pool configuration is incorrectly configured.

 

Answer: A

Explanation

First we should check which interface on R3 that is connected to R2 via the “show run” command.

R3_show_run.jpg

From the description we learn interface E0/1 is connected to R2. Use the “show ip interface brief” command to verify the IP address of this interface.

R3_show_ip_int_brief.jpg

Therefore we can conclude this interface does not have any IP address and there is no configuration on this interface (except the “description Link to R2” line).

If R3 wants to receive an IP address from R2 via DHCP, interface E0/1 should be configured with the command “ip address dhcp” so the answer “DHCP is not enabled on this interface” is correct.

Question 2

R1 router clock is synchronized with ISP router. R2 is supposed to receive NTP updates from R1. But you observe that R2 clock is not synchronized with R1. What is the reason R2 is not receiving NTP updates from R1?

A. R1 router Ethernet interface that is connected to R2 is placed in shutdown condition.
B. R2 router Ethernet interface that is connected to R1 is placed in shutdown condition.
C. The NTP server command not configured on R2 router.
D. The IP address that is used in the NTP configuration on R2 router is incorrect.

 

Answer: D

Explanation

First we should verify if the ports connected between R1 and R2 is in “up/up” state with the “show ip interface brief” command on R1 & R2.

R1_R2_show_ip_int_brief.jpg

Note: We learn R1 & R2 connect to each other via E0/2 interface because the IP addresses of these interfaces belong to 192.168.10.0/30 subnet. Both of them are “up/up” so the link connecting between R1 & R2 is good.

Next we need to verify the ntp configuration on R2 with the “show running-config” command.

R2_show_run_ntp_part.jpg

So there is only one command related to NTP configuration on R2 so we need to check if the IP address of 192.168.100.1 is correct or not. But from the “show ip interface brief” command on R1 we don’t see this IP -> This IP address is not correct. It should be 192.168.10.1 (IP address of interface E0/2 of R1), not 192.168.100.1.

Question 3

Why applications that are installed on PC’s in R2 LAN network 10.100.20.0/24 are unable to communicate with Server1?

A. A standard ACL statement that is configured on R1 is blocking the traffic sourced from R2 LAN network.
B. A standard ACL statement that is configured on R1 is blocking the traffic sourced from Server1 network.
C. A standard ACL statement that is configured on R2 is blocking the traffic sourced from Server1 network.
D. A standard ACL statement that is configured on R2 is blocking the traffic sourced from R2 LAN network.

 

Answer: C

Explanation

We should check if we can ping from R1 to Server 1 or not:

R1_ping_Server1.jpg

The ping worked well so maybe R1 is good so we should check R2 first. We notice on R2 there is an access-list:

R2_show_run_access_list_part.jpg

This access-list is applied to E0/2 interface with inbound direction. The purpose of this access-list is to block traffic with source IP address of 172.16.200.0/24 so it will block all traffic sent from Server 1 to us.

Question 4

Users complain that they are unable to reach internet sites. You are troubleshooting internet connectivity problem at main office. Which statement correctly identifies the problem on Router R1?

A. NAT configurations on the interfaces are incorrectly configured.
B. NAT translation statement incorrectly configured.
C. Interesting traffic for NAT ACL is incorrectly configured.
D. Only static NAT translation configured from the server, missing Dynamic NAT or Dynamic NAT overloading for internal networks.

 

Answer: A

Explanation

If all users cannot access internet then R1 is most likely to cause the problem so we should check it first. From the “show running-config” command we will see:

R1_show_run_nat_interfaces.jpg

We notice that interface E0/0 (connected to ISP) has been configured as “nat inside” while interfaces E0/1 & E0/2 (connected to our company) have been configured as “nat outside”. This is not correct because “nat inside” should be configured with interfaces connected to our company while “nat outside” should be configured with interfaces connected to the internet. Therefore we can conclude the NAT configuration on these interfaces is not correct.

Comments (27) Comments
  1. Mike FL
    October 17th, 2016

    This is on test, as well as many new questions…

  2. ibrahim
    October 18th, 2016

    good work 9 tuters

  3. Mike FL
    October 25th, 2016

    on the exam

  4. mona
    October 26th, 2016

    what is the diffrent questions on exam…..?

  5. Anonymous
    October 30th, 2016

    someone can explain q1

  6. SW-1
    November 5th, 2016

    @anonymous if you look at the answer it shows on the show ip interface brief that the ethernet which is connected with R2 does not have any ip address thats why its not connected properly. therefore thats your answer A

  7. CCNA v3.0
    November 17th, 2016

    please send me new dumps for ccna200-125

    {email not allowed}

  8. chemam
    November 17th, 2016

    please send me new dumps for ccna200-125

    {email not allowed}

  9. chemam
    November 17th, 2016

    lab RIPV2 and DHCP its valid in exam ?

  10. aducgar
    November 29th, 2016

    good job

  11. PingPong
    November 30th, 2016

    Hi guys,

    Is “show running-config” allowed during exams? if not, what other show commands do you suggest as alternative? Thanks a lot!

  12. kingkunta
    December 2nd, 2016

    yes any command @pingpong
    you can show “show run” altenatavely works too also make sure youve got the 9tuts lab sims on fingertips

  13. khmtambi
    December 7th, 2016

    guyz please tell which labs are latest?

  14. Kazue
    December 15th, 2016

    can someone send the latest packet tracer files for the simulation?

  15. Ahmed
    December 25th, 2016

    i fail on exam one week back i am trying again from 9tut tutorial to do another try .
    OSPF and RIP connected to ISP valid for exam 15/12/2016 all the best keep up .
    guys dont just pass your paper and leave us give us our command to pass also

    thanks

  16. chriss Engineer CCNA
    December 27th, 2016

    Hello,
    Any one pls share dumps 200-125 to arnoldbashigesafari @ gmail.com pls do needful guys thank you.

  17. Anonymous
    December 27th, 2016

    Hi there
    If you have 200-125 questions, send them to this mail address
    {email not allowed}

  18. Anonymous
    December 27th, 2016

    Hi there
    If you have 200-125 questions, send them to this mail address
    Burakwcakmak @ gmail.com

  19. mark
    December 28th, 2016

    Is there anyone here has a good heart can share a ccna v3 ebook so i can review some updated topics.. thank you for your kindness

  20. CesaC
    January 4th, 2017

    Hi guys I just passed CCNA 200-125 today with 810/1000 points! all questions are in 171q. thx PPAP & 9tut you rock guys! >))

  21. mohammed
    January 5th, 2017

    Congratulations Cesac, What are the labs which came in the exam ?

  22. Anonymous
    January 18th, 2017

    Going for 200-125 exam on monday.

  23. Naimish
    January 18th, 2017

    Does 171Q still valid??i am going to appear for exam on 23JAN17.

    Pls Rply.

  24. UIO
    January 19th, 2017

    Alhamdullah ,,,,,, i passed today ., same Questions,
    ACL 3 . RIV2. OSPF. DHCP

    171 Q still valid.

    thankss 9tut,

  25. Burhan
    January 20th, 2017

    UIO in pakistan ????

  26. Sessum
    January 20th, 2017

    Couldn’t find the 171q dump and no one provided it to me when I posted mt email….. However did come across this seller on eb8y (looks like im not able to type it out without it being filtered). Passed the exam with his materials. If you dont want to wait or bother looking for the 171Q dump here is an alternative:

    e 8 a y (dot) c o m / i t m / 2 0 0 – 1 2 5 – v 3 – 0 – D u m p – / 3 2 2 3 3 6 7 8 2 5 2 6 ? (change the “8” to a “b” with no spaces)

    Cheers and Good Luck!