Trusted Huawei H12-831_V1.0 Exam Dumps – Avoid Costly Exam Retakes

Question No: 1

MultipleChoice

On the enterprise network shown in the figure, R3 is connected to the NMS, and all devices on the network communicate with the NMS through a VPN.

During an inspection, it is found that R3 has redundant RTs (Route Targets).

Which of the following commands can be run on R3 to delete the redundant RTs without affecting the connectivity between all devices and the NMS?

Options:

A. undo vpn-target 3:1 import-extcommunity B. undo vpn-target 1:3 export-extcommunity C. undo vpn-target 1:3 import-extcommunity D. undo vpn-target 2:3 export-extcommunity

Options

A'undo vpn-target 3:1 import-extcommunity' ( Incorrect)
R1 exports RT 1:3, and R3 imports it as 3:1.
Removing 3:1 import-extcommunity would block R3 from receiving routes from R1, disrupting connectivity to NMS.
Thus, this option is incorrect.

B'undo vpn-target 1:3 export-extcommunity' ( Correct)
R3 exports RT 1:3, but there is no need for R3 to advertise routes with 1:3.
R1 already exports 1:3, and R3 only needs to import it.
Removing vpn-target 1:3 export-extcommunity does not affect connectivity but eliminates redundancy.
This is a correct choice.

C'undo vpn-target 1:3 import-extcommunity' ( Incorrect)
R3 needs to import 1:3 to receive routes from R1 (which is required for NMS communication).
If removed, R3 will not receive necessary routes, breaking connectivity.
Thus, this option is incorrect.

D'undo vpn-target 2:3 export-extcommunity' ( Correct)
R2 exports RT 2:3, but R3 does not need to receive it.
This RT is redundant and can be removed without affecting connectivity.
This is a correct choice.
4. Evaluating the Answer Choices
Option
Correct?
Reasoning
A
Incorrect
R3 must import 3:1 from R1 to maintain connectivity.
B
Correct
Removing export-extcommunity 1:3 eliminates redundancy without affecting connectivity.
C
Incorrect
Removing import-extcommunity 1:3 would block R3 from receiving necessary routes.
D
Correct
Removing export-extcommunity 2:3 eliminates redundancy without affecting connectivity.
Correct Answe r : B and D.
Final Conclusion:
Route Targets (RTs) are used in MPLS VPNs to control route import/export policies.
R3 has redundant RTs, and removing unnecessary exports (1:3 and 2:3) optimizes configuration.
Correct commands to remove redundancy without affecting connectivity are:
undo vpn-target 1:3 export-extcommunity
undo vpn-target 2:3 export-extcommunity
Thus, the correct answer is: B and D.

Question No: 2

MultipleChoice

On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements is false?

Options

AIf the link between R1 and SI is disconnected, Rl recalculates the optimal path to R3 and performs path switching instantly.

BIf the link between R2 and SI is disconnected, R1 recalculates the optimal path to R3 and performs path switching instantly.

CIf the link between R1 and SI is disconnected, R1 directly uses the backup path to forward packets to R3 because FRR is enabled on R1.

DIf the link between R1 and SI is disconnected and you check neighbor information on R1, the neighbor relationship between R1 and R2 will instantly display Down.

Question No: 3

MultipleChoice

The figure shows the file information on R2. When a network engineer runs the dir | exclude 1 command to view the file information, which of the following files will be displayed?

Options

A2.cfg

B3.dat

C4.zip

D1.cfg

Question No: 4

MultipleChoice

As shown in the figure, configure a backhaul summary route 10.0.0.0/24 on the border route RT1. next hop

to RT2. At the same time, the default route to the external network is configured. At this point, a routing black hole will appear. The following is about routing

Is the black hole statement correct? (multiple choice)

Options

AConfiguring black hole routing can solve the routing black hole problem

BRouting black hole has no impact on the network and can be ignored

CPrecise routing $ can always avoid routing black holes

DIf the terminal in the network sends data packets to the network segment that does not appear on the internal network, a loop will occur

Question No: 5

MultipleChoice

esigth uses different colors to distinguish different alarm levels, red represents emergency, orange represents important, and yellow represents

The table is secondary, and blue represents the prompt. Which of the following statements about different alarm levels is correct: (multiple choice)

Options

APrompt: A potential or imminent business-impacting failure has been detecteD. but currently has little business impact

BMinor: There is currently a certain impact on the business, but corrective actions are required to prevent serious failure alarms

CUrgent: Alerts that have affected the business and require immediate corrective action

DImportant: An alarm that has affected the business and will have serious consequences if not handled in time

Question No: 6

MultipleChoice

In the absence of a header, the LDP adjacencies will trigger the establishment of LSPO based on the IP routing of the 32-bit address.

Options

ATrue

BFalse

Question No: 7

FillInTheBlank

by executing___________The command can completely isolate the second and third layer users of different ports on the same LAN and cannot communicate. (Please use English and lowercase letters to complete the command, and the command cannot be abbreviated)

Free Huawei H12-831_V1.0 Exam Dumps May 2026