2025 Updated Verified H12-831_V1.0-ENU Q&As - Pass Guarantee or Full Refund
[Sep-2025] H12-831_V1.0-ENU Certification with Actual Questions from PracticeDump
The Huawei H12-831_V1.0-ENU exam consists of multiple-choice questions and requires candidates to demonstrate their ability to apply their knowledge to real-world scenarios. H12-831_V1.0-ENU exam is designed to test the candidates' ability to solve problems and make decisions in a fast-paced and dynamic environment. H12-831_V1.0-ENU exam also includes simulations that require candidates to configure and troubleshoot complex network scenarios.
NEW QUESTION # 38
MPLS can carry multiple network protocol services, including unicast IPv4 services, multicast IPv4 services, unicast IPv6 services, and multicast IPv6 services.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 39
In OSPFv3, an LSA whose propagation range is one area has_____kind. (Fill in Arabic numerals only)
Answer:
Explanation:
9
NEW QUESTION # 40
MPLS supports nesting of multiple labels. After receiving an MPLS packet, a device first processes the label next to the Layer 2 header, that is, the top MPLS label.
- A. FALSE
- B. TRUE
Answer: B
NEW QUESTION # 41
Which of the following are the advantages of VLAN aggregation? (Multiple choice)
- A. Increased flexibility of addressing
- B. Realize the isolation of broadcast domains between Sub-VLANs
- C. Reduce the waste of IP addresses
- D. Increased the number of available MLANs
Answer: B,C
NEW QUESTION # 42
In a multi-level RR scenario, a large number of second-level RR are connected to the first-level RR, which may cause the BGP routing table of the first-level RR to overflow. What method can be used to reduce the risk of overflow of the BGP routing table of the first-level RR?
- A. Set the same Cluster-lD
- B. ORF
- C. Routing control
- D. Route aggregation
Answer: D
NEW QUESTION # 43
Which of the following reasons may cause the hosts in the same VLAN of the LAN to fail to communicate with each other?
- A. The wrong port is configured on the switch andMA, Caddress binding
- B. interface is artificialshutdownor the physical interface is damaged
- C. switchMA, Caddress learning errors
- D. Port isolation is configured on the switch
Answer: A,B,C,D
NEW QUESTION # 44
On the network shown in the figure, the network administrator configures the DHCP snooping trust function on the switch.
* GE0/0/2 is a trusted interface (connected to the DHCP Server).
* GE0/0/3 is an untrusted interface (potential attacker).
Which of the following statements are true about the two interfaces?
Options:
- A. When receiving a DHCP response packet on GE0/0/2, the switch forwards the packet through GE0/0/1.
- B. When receiving a DHCP request packet on GE0/0/2, the switch forwards the packet through GE0
/0/3. - C. When receiving a DHCP request packet on GE0/0/3, the switch forwards the packet through GE0
/0/2. - D. When receiving a DHCP response packet on GE0/0/3, the switch forwards the packet through GE0/0/1.
Answer: A,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding DHCP Snooping
DHCP Snooping is a security feature that filters untrusted DHCP messages to prevent attacks such as:
* Rogue DHCP servers distributing incorrect IP addresses.
* DHCP starvation attacks.
In DHCP Snooping, switch ports are classified as:
* Trusted Interfaces: Allow both DHCP requests and DHCP responses to pass through.
* Untrusted Interfaces: Allow only DHCP requests but drop DHCP responses (to prevent rogue DHCP servers).
2. Analyzing Each Answer Option
* Option A: "When receiving a DHCP response packet on GE0/0/2, the switch forwards the packet through GE0/0/1."
* Correct.
* GE0/0/2 is a trusted interface (connected to the DHCP server).
* DHCP responses (ACK, NAK, OFFER) come from the DHCP Server.
* Since DHCP responses are allowed on trusted interfaces, the switch forwards them to the client (PC1) via GE0/0/1.
* Option B: "When receiving a DHCP request packet on GE0/0/2, the switch forwards the packet through GE0/0/3."
* Incorrect.
* DHCP requests originate from clients (PC1, attackers, etc.), not from the DHCP server.
* The DHCP request should be forwarded to the DHCP server via a trusted interface (not GE0/0
/3, which is untrusted).
* Option C: "When receiving a DHCP response packet on GE0/0/3, the switch forwards the packet through GE0/0/1."
* Incorrect.
* GE0/0/3 is an untrusted interface (connected to the attacker).
* DHCP responses (ACK, OFFER) from untrusted interfaces are dropped to prevent rogue DHCP attacks.
* The switch will not forward the packet.
* Option D: "When receiving a DHCP request packet on GE0/0/3, the switch forwards the packet through GE0/0/2."
* Correct.
* DHCP requests originate from clients (PC1 or attacker).
* Since DHCP requests are allowed on untrusted interfaces, the switch forwards them to the DHCP server via the trusted interface (GE0/0/2).
Final Answer:
# A and D are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* DHCP Snooping and Port Trust Classification
* How Trusted and Untrusted Ports Handle DHCP Packets
* Preventing Rogue DHCP Servers Using DHCP Snooping
NEW QUESTION # 45
IS-IS is a link-state routing protocol that uses the SPF algorithm for route calculation. As shown in the figure, a campus deploys both IPv4 and IPv6 and runs IS-IS to achieve network interconnection. R2 only supports IPv4. Which of the following statements is true about the topology calculation of this network?
- A. By default, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R2-R4. Since R2 does not support IPv6, R2 will directly discard IPv6 packets after receiving them, causing traffic loss.
- B. By default, IPv4 and IPv6 networks will be calculated separately to form different shortest path trees
- C. If you want IPv4 and IPv6 network computation to form the same shortest path tree, you need to run the ipv6 enable topology ipv6 command to enable the IPv6 capability in the IS-IS process.
- D. By default, since R2 does not support IPv6, in the shortest path tree formed by IPv6 network calculation, the path from R1 to R4 is: R1-R3-R4
Answer: D
NEW QUESTION # 46
You have set IS-IS IPv6 enable under the interface, what is the meaning of this command?
- A. Activate on the interfaceIPv6 IS-ISprocess1
- B. Activate on the interfaceIPv6 IS-ISprocess3
- C. activate on the interfaceIPv6 IS-ISprocess10
- D. activate on the interfaceIPv6 IS-ISprocess2
Answer: A
NEW QUESTION # 47
To support the processing and calculation of IPv6 routes, IS-IS adds a new NLPID to TLV 129. The NLPID is an 8-bit field that identifies network layer protocol packets. Which of the following is the NLPID of IPv6?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 48
A park deployed IPv6 for business testing. There are 4 routers in the network, running OSPFV3 to realize the interconnection and intercommunication of IPv6 networks. As shown in the figure, an engineer checked the LSDB of R2 and intercepted one of the Link-LSAs. Regarding the description of the LSA, which of the following statements are correct? (Multiple choice)
- A. The LSA shows that R2 does not support external routing, but participates in IPv6 routing calculations
- B. The router that generated the LSA is R2
- C. The IPv6 address prefix of the R2 interface GE0/0/0 is 2001:2343: 23: :/64
- D. The link-local address of the R2 interface GE0/0/0 is FE80::2E0; FCFF:FECD:4F79
Answer: B,C,D
NEW QUESTION # 49
On the network shown in the figure, a network engineer finds that the path between PC1 and PC2 is not the optimal path, and all links along the path have the same cost.
Given this, which of the following routers may be the root bridges of the Layer 2 network?
Options:
- A. SW2
- B. SW4
- C. SW1
- D. SW3
Answer: B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the Spanning Tree Protocol (STP) and Root Bridge Selection
* Spanning Tree Protocol (STP) is used to prevent loops in a Layer 2 network by electing a Root Bridge and determining a loop-free topology.
* The Root Bridge is elected based on the lowest Bridge ID (BID), which consists of:
* Priority Value (Lower is preferred, default is 32768).
* MAC Address (Lower MAC wins in case of a tie).
* The optimal forwarding path is chosen based on cost, which is usually determined by the link bandwidth.
Why the Path is Not Optimal?
* The network engineer states that all links have the same cost, meaning that the STP Root Bridge election determines the topology rather than cost differences.
* The fact that the path between PC1 and PC2 is suboptimal suggests that the Root Bridge may not be ideally placed.
Determining the Likely Root Bridge:
* The Root Bridge is the switch with the lowest BID (priority + MAC).
* All switches calculate the shortest path to the Root Bridge and place ports in either Forwarding or Blocking mode.
* From the diagram, the traffic is flowing through SW2 # SW4 # SW3 instead of directly via SW2 # SW3.
* This suggests that the Root Bridge is likely SW1 or SW4 because:
* Root Bridges do not block any ports.
* If SW1 or SW4 is the Root Bridge, the spanning tree topology might force the path to take a longer route.
Key Takeaways:
* Root Bridge selection influences the entire Layer 2 forwarding path.
* The lowest Bridge ID (priority + MAC) determines the Root Bridge.
* If a suboptimal path is taken, the Root Bridge is likely placed in a location that forces certain links to block.
* In this scenario, SW1 or SW4 is the most probable Root Bridge, forcing traffic through an unintended path.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Huawei HCIP-Datacom Official Certification Guide, Chapter on Spanning Tree Protocol (STP) and Root Bridge Selection.
* Huawei Datacom Training Materials, Section on STP Convergence and Network Optimization.
* Huawei Datacom Configuration Guide, Command Reference for STP Root Bridge Selection and Path Calculation.
NEW QUESTION # 50
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.)
Answer:
Explanation:
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 # 51
LDP messages are exchanged between LSRs running the LDP protocol. LDP messages can be divided into four types according to their functions. Which of the following is not a message type of LDP?
- A. conversation message
- B. discovery message
- C. announcement message
- D. label exchange message
Answer: D
NEW QUESTION # 52
Which of the following statements about the OSPFV3 packet format is correct?
- A. HellotelegramoptionNo changes to the field
- B. removedAuthentication,AuthTypefield
- C. OSPFversion number from2became3
- D. HelloPackets no longer carry address informationInterface ID
Answer: B,C,D
NEW QUESTION # 53
As shown below:
- A. area. have8router
- B. area. have4router
- C. area. have4indivualMAThe internet
- D. area. have8indivualMAThe internet
Answer: B,C
NEW QUESTION # 54
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Huawei H12-831_V1.0-ENU exam covers a wide range of topics related to advanced routing and switching technologies, such as OSPF, BGP, MPLS, QoS, and IPv6. H12-831_V1.0-ENU exam also includes hands-on lab exercises that allow candidates to demonstrate their practical skills in configuring and troubleshooting complex network topologies. By passing H12-831_V1.0-ENU exam, candidates can demonstrate their proficiency in designing, implementing, and managing enterprise-level networks.
The Huawei H12-831_V1.0-ENU exam is designed to cover a wide range of topics related to the field of Datacom-Advanced Routing and Switching Technology. Some of the topics covered in the exam include advanced routing technologies, VPN technologies, MPLS technologies, IPv6 technologies, BGP technologies, and network security technologies. H12-831_V1.0-ENU exam also covers practical scenarios and real-world examples to ensure that candidates can apply their knowledge in real-world situations.
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