[Sep-2026] Free H12-831_V1.0-ENU Exam Dumps to Improve Exam Score [Q24-Q38]

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[Sep-2026] Free H12-831_V1.0-ENU Exam Dumps to Improve Exam Score

2026 Realistic H12-831_V1.0-ENU Dumps Exam Tips Test Pdf Exam Material

Huawei H12-831_V1.0 certification exam is a comprehensive exam that requires extensive preparation. Candidates are required to have a thorough understanding of the exam objectives, exam format, and exam content. H12-831_V1.0-ENU exam is conducted in English, and candidates are required to have a good understanding of the language. H12-831_V1.0-ENU exam consists of multiple-choice questions and simulation questions, which test the candidate’s practical skills.

NEW QUESTION 24
On the OSPF network shown in the figure, the cost values of links are marked. OSPF IP FRR is enabled on R1. The primary path from R1 to 10.0.3.3/32 is R1 – > R2 – > R3, and the backup path is R1 – > R4 – > R2 – > R3.

TRUE

FALSE

Comprehensive and Detailed In-Depth Explanation:
To determine whether the statement is true or false, we need to analyze the OSPF network, the cost values of the links, the primary and backup paths, and the role of OSPF IP Fast Reroute (FRR) enabled on R1. Let’s break it down step by step:
* Understanding the Network Topology and Costs:
* The network consists of four routers: R1, R2, R3, and R4.
* The destination network is 10.0.3.3/32, located at R3.
* The link costs are as follows:
* R1 to R2: Cost = 10
* R1 to R4: Cost = 10
* R4 to R2: Cost = 20
* R2 to R3: Cost = 5
* The total cost of a path is the sum of the costs of all links in that path.
* Calculating the Primary Path Cost (R1 – > R2 – > R3):
* Path: R1 – > R2 (cost = 10) – > R3 (cost = 5)
* Total cost = 10 + 5 = 15
* This is the shortest path (lowest cost) from R1 to R3, as stated in the question. OSPF uses the Dijkstra algorithm to calculate the shortest path based on link costs, so R1 will naturally select R1
– > R2 – > R3 as the primary path to reach 10.0.3.3/32.
* Calculating the Backup Path Cost (R1 – > R4 – > R2 – > R3):
* Path: R1 – > R4 (cost = 10) – > R2 (cost = 20) – > R3 (cost = 5)
* Total cost = 10 + 20 + 5 = 35
* This path has a higher cost (35) compared to the primary path (15), which is expected for a backup path. The backup path is not used under normal conditions but is precomputed for fast failover in case the primary path fails.
* Role of OSPF IP Fast Reroute (FRR):
* OSPF IP FRR is a mechanism designed to provide fast convergence in case of link or node failures by precomputing backup paths. When enabled on R1, FRR ensures that R1 has a precomputed backup path to quickly switch traffic to an alternate route (e.g., R1 – > R4 – > R2 – > R3) if the primary path (R1 – > R2 – > R3) fails.
* FRR typically uses Loop-Free Alternates (LFA) or other techniques to ensure the backup path does not create loops and is immediately available. In this case, the backup path R1 – > R4 – > R2
– > R3 is valid because:
* It does not loop back to R1.
* It reaches R3, the destination.
* The cost (35) is higher than the primary path (15), but this is acceptable for a backup path.
* The question states that OSPF IP FRR is enabled on R1, and the backup path is explicitly given as R1 – > R4 – > R2 – > R3. This aligns with FRR’s purpose of maintaining a precomputed backup path.
* Verifying the Statement:
* The statement claims: “The primary path from R1 to 10.0.3.3/32 is R1 – > R2 – > R3, and the backup path is R1 – > R4 – > R2 – > R3.”
* We calculated that the primary path (R1 – > R2 – > R3) has a cost of 15, which is the shortest path and correct for OSPF’s behavior.
* The backup path (R1 – > R4 – > R2 – > R3) has a cost of 35, which is higher but valid as a backup path, especially with OSPF IP FRR enabled on R1 to ensure fast failover.
* Both paths are correctly identified in the question, and OSPF IP FRR’s presence on R1 supports the existence of a precomputed backup path. Therefore, the statement is accurate.
* Conclusion:
* The primary path (R1 – > R2 – > R3) and backup path (R1 – > R4 – > R2 – > R3) are correctly described, and OSPF IP FRR on R1 ensures the backup path is precomputed and ready for use.
Thus, the statement is true.
References (Based on HCIP-Datacom-Advanced Routing & Switching Technology Concepts):
* OSPF Path Calculation: HCIP-Datacom documentation on OSPF’s Dijkstra algorithm and cost-based path selection (e.g., Section on OSPF Routing Metrics).
* OSPF IP Fast Reroute (FRR): HCIP-Datacom coverage of FRR mechanisms, including Loop-Free Alternates and backup path computation (e.g., Chapter on OSPF Advanced Features and High Availability).
* Link Cost and Path Optimization: HCIP-Datacom explanation of link cost configuration and OSPF path selection (e.g., Section on OSPF Network Design and Optimization).
Based on the provided image and the context of the HCIP-Datacom-Advanced Routing & Switching Technology exam, I’ll format and answer the question you’ve shared. I’ll ensure the response is accurate, detailed, and aligned with the official HCIP-Datacom documentation, while correcting any typos and providing a comprehensive explanation. Since you’ve only provided one question in the image, I’ll address it in the requested format. If there are additional questions, please share them, and I’ll format and answer them similarly.

NEW QUESTION 25
The figure shows information about VPN1 on a PE (Provider Edge) router in a BGP/MPLS IP VPN network .
When the VPNv4 route corresponding to VPN1 is advertised to the remote PE , which VPNs of the remote PE will accept the route?
VPN1 Configuration:
ip vpn-instance VPN1
ipv4-family
route-distinguisher 100:1
vpn-target 100:1 200:1 300:1 export-extcommunity
VPN Import Policies on the Remote PE:

VPN1: Import RT=100:1

VPN2: Import RT=200:1, 400:1

VPN3: Import RT=100:1, 300:1

VPN4: Import RT=500:1

Comprehensive and Detailed In-Depth Explanation:
1. Understanding Route Targets (RT) and Route Distribution in MPLS VPN
* MPLS Layer 3 VPNs (L3VPNs) use BGP to distribute VPN routes across multiple Provider Edge (PE) routers.
* Each VPN instance (VRF) is configured with Route Targets (RTs) to control which VPN routes are imported/exported.
* Route Distinguishers (RDs) are unique per VRF but do not affect route selection.
2. Analyzing VPN1 Configuration
* VPN1 is exporting routes with the following Route Targets (vpn-target values):
* 100:1
* 200:1
* 300:1
* Remote VPNs will import these routes only if their import RT list matches one of the exported RTs.
3. Matching Exported RTs with Import RTs in Remote VPNs
Remote VPN
Import RTs
Matches VPN1 Exported RTs (100:1, 200:1, 300:1)?
Accepts the Route?
VPN1
100:1
# Matches 100:1
# Yes
VPN2
200:1, 400:1
# Matches 200:1
# Yes
VPN3
100:1, 300:1
# Matches 100:1, 300:1
# Yes
VPN4
500:1
# No match
# No
# VPN1, VPN2, and VPN3 accept the route.
# VPN4 does not accept the route because 500:1 is not in the export list of VPN1.
Final Conclusion:
# Correct answer: VPN1, VPN2, and VPN3 will accept the route.
# VPN4 does not accept the route because there is no matching RT.
Thus, the correct answer is:
# A. VPN1: Import RT=100:1
# B. VPN2: Import RT=200:1, 400:1
# C. VPN3: Import RT=100:1, 300:1
# D. VPN4: Import RT=500:1 (No match, does not accept the route).
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 – MPLS VPN Route Target and Route Filtering Huawei Official HCIP-Datacom Study Guide – BGP/MPLS VPN Import/Export Mechanisms Huawei Documentation on MPLS VPN Route Distinguisher (RD) and Route Target (RT) Concepts

NEW QUESTION 26
The figure shows the LSP information of R1 and R2 on an MPLS network. An administrator runs the ping
3.3.3.3 command on R1. Given this, which of the following statements is true?

The ping packet sent by R1 carries label 1025. After receiving the packet, R2 removes the label and forwards the packet based on IP addresses.

The ping packet sent by R1 does not carry any label. After receiving the ping packet, R2 forwards it based on IP addresses.

The ping packet sent by R1 carries label 1025. After receiving the packet, R2 swaps the label and forwards the packet based on MPLS.

The ping packet sent by R1 does not carry any label. After receiving the ping packet, R2 adds a label to the packet and forwards the packet based on MPLS.

The display mpls lsp output on R1 contains the following entry for FEC 3.3.3.3/32:
In/Out Label: NULL/1025
Out Interface: GE0/0/1
NULL/1025 means R1 is the ingress LSR for this LSP. The packet initially has no label, so R1 performs a push operation and sends it toward R2 with label 1025.
R2’s corresponding entry is:
In/Out Label: 1025/3
Out Interface: GE0/0/1
Label value 3 is the MPLS implicit-null label. It is not placed in the outgoing packet. Instead, it instructs the penultimate-hop router-R2-to remove label 1025. This operation is called penultimate-hop popping (PHP).
R2 consequently sends an unlabeled IPv4 packet to egress router R3, which processes the packet using normal IP forwarding.
Therefore, the packet sent from R1 carries label 1025, and R2 removes the label before forwarding it toward R3. Huawei MPLS label operations and PHP

NEW QUESTION 27
VLAN aggregation is configured on a switched network. Sub-VLAN 2 and Sub-VLAN 3 are added to Super-VLAN 10.
To enable hosts in different Sub-VLANs to communicate with each other, run the _____ inter-sub-vlan- proxy enable command in the view of VLANIF 10, corresponding to the Super-VLAN.
(Enter the answer in lowercase letters only.)

supervlan
Explanation:
1. Understanding VLAN Aggregation in Huawei Switches
* VLAN aggregation is a technique that groups multiple VLANs (sub-VLANs) under a single Super- VLAN.
* Super-VLANs do not have member interfaces but include multiple Sub-VLANs that share a common gateway (VLANIF interface).
2. Inter-Sub-VLAN Communication Requirement
* By default, hosts in different sub-VLANs cannot communicate directly.
* To enable communication between different sub-VLANs within the same Super-VLAN, an inter- sub-VLAN proxy must be enabled.
* This is done using the inter-sub-vlan-proxy enable command in the VLANIF interface of the Super- VLAN.
3. Correct Command Usage
* The command format is:
shell
CopyEdit
supervlan inter-sub-vlan-proxy enable
* This command must be executed under VLANIF 10, corresponding to the Super-VLAN.
4. Why is the Answer “supervlan”?
* The missing parameter in the command should be supervlan, because it is used to enable communication between Sub-VLANs under a Super-VLAN.
* This is a specific Huawei command used in HCIP-Datacom-Advanced Routing & Switching Technology certification.

NEW QUESTION 28
In the network shown in the figure below, if you want to implement a remote LDP session between SWA and SWC, which statement is correct?

No need to specify the lsr-id of the correct equivalent

The configuration in the figure can be achieved

Need to create a remote peer, and then specify the lsr-id of the peer

Need to be equipped with a straight connection port to establish a TCP connection

NEW QUESTION 29
In the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, it will send it.

Keepalive Message

Initialization Message

Hello Message

Error Notification Message

NEW QUESTION 30
In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R6Loopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number.

Which of the following descriptions is wrong?

The R4 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R2.

The Inter-Area-Prefix-LSA describing 2000::6/128 generated by R2 exists in R1’s LSDB.

The R6 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R3.

The R5 LSDB contains the Inter-Area-Prefix-LSA describing 2000::6/128 generated by R1.

NEW QUESTION 31
Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PCI to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PCI cannot match PCI.) (Tokens can be reused.)

NEW QUESTION 32
An MPLS label is a 20-bit local identifier. Its label space is divided into special labels, static shared label space, and dynamic signaling protocol label space. Which of the following are special labels? (Multiple choice)

1025

1022

NEW QUESTION 33
On an MPLS network, when a transit device receives an MPLS packet and is ready to swap labels, it finds that the label value after swapping is 0.
In this case, which of the following operations will the device perform?

Removes the label from the MPLS packet and forwards the packet to the next hop.

Pushes label 0 into an outer label of the MPLS packet and forwards the MPLS packet with double labels to the next hop.

Forwards the packet to the next hop without processing the label.

Swaps label 0 with the original label in the MPLS packet and forwards the packet to the next hop.

NEW QUESTION 34
On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2 and R5. In AS 65000, R1, R3, R4, and R6 each establish IBGP peer relationships with R2 and R5. R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. The IBGP peer relationships are established using Loopback0. The IP address of Loopback0 on each router is 10.0.X.X/32, and the router ID is 10.0.X.X, where X is the number of the router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import- route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import-route command. Which of the following statements are true?

The routing table of R4 contains two equal-cost default routes.

The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.

The routing table of R1 contains the route 192.168.2.0/24.

The routing table of R1 contains two equal-cost default routes.

NEW QUESTION 35
The network administrator has deployed the DHCP snooping function on the access switch.
Which of the following solutions can be used to reduce the impact of attackers maliciously applying for IP addresses and causing DHCP Server denial of service? (Multiple choice)

Enable the device to generate static MAC entries for interfaces based on the DHCP Snooping binding table.

Configure DHCP Snooping to check the CHADDR field in the DHCP Request message

Set the interface on the switch that is connected to the legitimate DHCP server as a trusted interface

Limit the number of MAC addresses learned by the switch interface through DHCP Snooping

NEW QUESTION 36
OSPF requires that routers in the same area have the same link state database (LSDB). As the number of routes on the network increases, some routers cannot carry so much routing information due to limited system resources. This state is called database overflow. If the Isdb-overflow-limit number 7 command is run on all routers on an OSPF network, which of the following conditions are likely to cause routers to enter the overflow state?

The number of Type 4 LSAs exceeds 7.

The number of Type 5 LSAs exceeds 7.

The number of Type 7 LSAs exceeds 7.

The number of Type 3 LSAs exceeds 7.

NEW QUESTION 37
Regarding MP-BGP, whici of the following description is incorrect?

When the PE and CE exchange routes through BGP, you need to create a BGP process for each VPN instance on the CE

MP-BGP’s message type and VPNv4 routing policy are the same as BGP-4

MP-BGP needs to assign private network labels to VPNv4 routes

MP-BGP advertises VPNv4 routes through two attributes: MP_REACH_NLRI and MP_UREACH_NLRI

NEW QUESTION 38
A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where R1 and R2 both have OSPF enabled, and function as the gateways of PCI and PC2, respectively. Given this, which of the following statements is false?

The OSPF routing table of R1 contains a route to 192.168.1.0/24.

The router LSA generated by R1 contains information with the link ID being 192.168.1.0.

R1 cannot ping 192.168.1.2.

PC1 and PC2 cannot ping each other.

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Huawei H12-831_V1.0-ENU Exam is an essential certification for any networking professional who wants to advance their career in the field of data communication. H12-831_V1.0-ENU exam is recognized globally and is highly respected in the industry. Candidates who pass the exam are equipped with the skills and knowledge required to design, implement, and maintain complex networks, and to troubleshoot network issues in a timely and effective manner. With the Huawei H12-831_V1.0-ENU certification, candidates can demonstrate their expertise in advanced routing and switching technologies, and open up new career opportunities in the field of data communication.

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[Sep-2026] Free H12-831_V1.0-ENU Exam Dumps to Improve Exam Score [Q24-Q38]