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Huawei H12-831_V1.0 Exam Dumps

Get All HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Exam Questions with Validated Answers

H12-831_V1.0 Pack
Vendor: Huawei
Exam Code: H12-831_V1.0
Exam Name: HCIP-Datacom-Advanced Routing & Switching Technology V1.0
Exam Questions: 156
Last Updated: May 30, 2026
Related Certifications: Huawei Certified ICT Professional, HCIP Datacom, HCIP Routing & Switching
Exam Tags: Advanced Level Network engineersSystem Engineers
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Free Huawei H12-831_V1.0 Exam Actual Questions

Question No. 1

If end-to-end QoS is configured on an MPLS network, the penultimate hop device on the MPLS network can pop MPLS labels from packets based on penultimate hop popping (PHP), so that the egress node can process packets based on the QoS priority in inner packets.

Show Answer Hide Answer
Correct Answer: A

Question No. 2

In the BFD (Bidirectional Forwarding Detection) mechanism, two systems establish a BFD session and periodically send BFD control packets along the path between them. If one system does not receive BFD control packets within a specified period, the path is considered faulty.

Which of the following is NOT a possible cause of the BFD session down event?

Options:

Show Answer Hide Answer
Correct Answer: D

Comprehensive and Detailed In-Depth

BFD (Bidirectional Forwarding Detection) is a high-speed failure detection mechanism that monitors link availability between two routers.

A BFD session can go down due to several reasons, including:

UDP Port 4784 blocked: BFD control packets are encapsulated in UDP with destination port 4784, so blocking this port prevents BFD communication (option A is a valid cause).

Physical interface failure: If the outbound interface for a single-hop BFD session fails, BFD will go down (option B is a valid cause).

Mismatched discriminators: BFD sessions use local and remote discriminators to uniquely identify sessions; if these do not match, the session cannot be established (option C is a valid cause).

Incorrect BFD session names do NOT cause the session to go down, because BFD sessions are identified by discriminator values, not names. (Option D is incorrect and is the correct answer to this question.)

Reference: HCIP-Datacom Advanced Routing & Switching Technology -- BFD Mechanism & Troubleshooting


Question No. 3

As shown in the figure, R1 to R4 are four routers in AS123. They all run OSPF to implement route reachability within the AS.

Network segments 10.1.1.0/24 and 10.4.4.0/24 are not advertised into OSPF.

R1 and R4 establish an IBGP peer relationship using Loopback0 and advertise network segments 10.1.1.0/24 and 10.4.4.0/24 into BGP.

Which of the following methods can be used to implement communication between PC1 and PC2?

Options:

Show Answer Hide Answer
Correct Answer: C, D

Comprehensive and Detailed In-Depth

1. Understanding the Routing Issue

R1 and R4 are BGP routers and have an IBGP connection.

R2 and R3 are OSPF-only routers (they do not run BGP).

Networks 10.1.1.0/24 and 10.4.4.0/24 are advertised into BGP but not OSPF.

PC1 (10.1.1.1) and PC2 (10.4.4.1) need communication, but their networks are not known to OSPF routers R2 and R3.

To fix this, we need a method that ensures R2 and R3 learn the routes for 10.1.1.0/24 and 10.4.4.0/24.

2. Evaluating Each Answer Option

Option A: 'Deploy policy-based routing on R1 and specify R2 as the next hop for traffic from PC1 to PC2.'

Incorrect.

Policy-Based Routing (PBR) does not solve the issue of missing routes in OSPF.

Even if R1 forwards traffic to R2, R2 does not know how to reach 10.4.4.0/24, causing packet drops.

A proper routing protocol solution is required instead of PBR.

Option B: 'Deploy MPLS and LDP on R1 to R4 and establish LSPs for routes 1.1.1.1/32 and 4.4.4.4/32.'

Incorrect.

MPLS requires label-switched paths (LSPs) but does not distribute routing information itself.

The real problem is that R2 and R3 do not have routing entries for 10.1.1.0/24 and 10.4.4.0/24.

MPLS does not fix the missing route advertisement issue.

Option C: 'Run BGP on R2 and R3, and establish full-mesh IBGP connections in AS 123.'

Correct.

If R2 and R3 run BGP, they can form IBGP sessions with R1 and R4 and learn routes 10.1.1.0/24 and 10.4.4.0/24 via BGP.

R2 and R3 would then be able to forward traffic correctly between PC1 and PC2.

This is a valid method to fix the issue.

Option D: 'On R1 and R4, import routes 10.1.1.0/24 and 10.4.4.0/24 into OSPF.'

Correct.

By redistributing BGP routes into OSPF, R1 and R4 can ensure that R2 and R3 learn the missing networks (10.1.1.0/24 and 10.4.4.0/24) via OSPF.

This allows full reachability without running BGP on R2 and R3.

This is another valid method to fix the issue.

Final Answer:

C and D are correct.

HCIP-Datacom-Advanced Routing & Switching Technology Reference:

BGP and OSPF Route Redistribution

IBGP Full-Mesh Requirement and Route Propagation

How Policy-Based Routing Works and Its Limitations


Question No. 4

BFD for OSPF refers to the association of BFD with OSPF to speed up OSPF's response to network topology changes. The OSPF neighbor relationship can enter the Full state only after the BFD session goes up. The OSPF neighbor relationship can go down only after the BFD session goes down.

Show Answer Hide Answer
Correct Answer: A

Question No. 5

After port isolation is configured on a switch, hosts in the same VLAN cannot communicate with each other at Layer 2 or Layer 3 by default.

Show Answer Hide Answer
Correct Answer: A

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