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Exam 100-105 topic 1 question 75 discussion

Actual exam question from Cisco's 100-105
Question #: 75
Topic #: 1
[All 100-105 Questions]


















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 R2, the network statement in the DHCP pool configuration is incorrectly configured.
  • B. On R3, DHCP is not enabled on the interface that is connected to R2.
  • C. On R2, the interface that is connected to R3 is in shutdown condition.
  • D. On R3, the interface that is connected to R2 is in shutdown condition.
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Suggested Answer: B 🗳️
First we should check which interface on R3 that is connected to R2 via the "show run" command.

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.

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.
by paulosrsf at June 24, 2019, 5:31 p.m.

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hari1592
5 years, 5 months ago
So what is the right answer for this question I think should be A
upvoted 1 times
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mime
5 years, 5 months ago
Understanding the question is more important than understanding the explanation. The outputs are different...Remember the question bank is FREE, so be careful.
upvoted 1 times
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Quan
5 years, 11 months ago
The answer should be A. The interface of R2 connecting to R3 is NOT configured with an IP address. The DHCP address pool is configured as 10.10.10.0/30 (command "network 10.10.10.0 ...."). In the figure, the network between R2 and R3 is 192.168.20.0/30. In conclusion, the configuration of DHCP pool is incorrect.
upvoted 4 times
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paulosrsf
6 years ago
The explanation doesn't fit the configuration of the Router3. It states that the interface lacks configuration, but de show run of the Router contains the commando "ip address dhcp".
upvoted 3 times
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