HCIP-Datacom H12-831_V1.0-ENU Dumps | Updated Sep 24, 2025 - Exam4Docs
Master 2025 Latest The Questions HCIP-Datacom and Pass H12-831_V1.0-ENU Real Exam!
The HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification exam is aimed at professionals who are already familiar with basic routing and switching concepts and have experience working with Huawei data communication products. H12-831_V1.0-ENU exam covers advanced topics such as network planning and design, IPv6, MPLS VPN, BGP, and QoS. Candidates who pass the exam will demonstrate their ability to design, deploy, and troubleshoot complex data communication networks.
Huawei H12-831_V1.0 : HCIP-Datacom-Advanced Routing is an advanced IT certification course that is designed to improve the skills and knowledge of IT professionals in the area of data communication and routing. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification equips the IT professionals with the knowledge and skills that they need to build, manage, and maintain complex network infrastructures using routing and switching protocols.
NEW QUESTION # 86
As shown in the figure, R1, R2, R3, and R4 are in the same PLs domain, and LDP is used to distribute IPLS labels between devices. R4 is the Egress LSR of the FEC 4.4.4.0/24. If you want to achieve R1 access
4.4.4.0/24, R4 does not need to query the label table but can know the forwarding priority of the data, then the outgoing label of R3 for the FEC should be:____. (Please fill in the Arabic numerals directly, without symbols)
Answer:
Explanation:
(0)
NEW QUESTION # 87
The rollback operation of the project cutover can be determined temporarily according to the situation during the cutover, and no advance planning is required.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 88
A campus has deployed IPv6 for service testing. There are 4 routers in the network, running 0SPFv3 to implement IPv6 network interconnection. As shown in the figure, an engineer checked the LSDB of R2 and intercepted one of the Link-LSAs. Which of the following statements is true about the description of this LSA?
- A. The router that generates this LSA is R2 port R2 connected
- B. The SA shows 2 does not support external routing, but participates in IPv6 routing calculation
- C. The link-local address of R2 interface GEO/0/0 is: FE80::2E0:FCFF:FEC, D:4F79
- D. IPv6 address prefix for GEO/0/0: 2001:DB8:2345:23::/64
Answer: A,C,D
NEW QUESTION # 89
IEIF expands the functions of OSPF by taking advantage of the strong expansibility of OSPF. To enable it to support IPv6 networks, the expanded protocol is called OSPFv3. OSPFv3 is compatible with OSPFv2.
- A. False
- B. True
Answer: A
NEW QUESTION # 90
On the OSPF network shown in the figure, area 1 is an NSSA, area 2 is a stub area, and R4 imports an external route 10.0.4.4/32. The router ID of each router is 10.0.X.X, where X is the router number. The asbr-summary 10.0.4.0 255.255.255.0 command is configured in the OSPF processes of R1 and R3.
Match the following descriptions of routing tables with the corresponding routers:
Answer:
Explanation:
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Key OSPF Concepts to Consider:
* Area 1 is an NSSA (Not-So-Stubby Area):
* NSSAs allow external routes but advertise them as Type-7 LSAs.
* The ABR (R2) converts these Type-7 LSAs into Type-5 LSAs for the backbone (Area 0).
* Area 2 is a Stub Area:
* Stub areas do not allow external routes (Type-5 LSAs).
* This means that R5 (inside Area 2) will NOT receive external routes like 10.0.4.4/32 or
10.0.4.0/24.
* Effect of asbr-summary 10.0.4.0 255.255.255.0 on R1 and R3:
* This command ensures that R1 and R3 will see a summarized route 10.0.4.0/24 instead of specific /32 routes.
Routing Table Analysis:
* R1 (ABR for NSSA, with ASBR summary configured)
* Connected to Area 1 (NSSA) and Area 0 (Backbone)
* Since asbr-summary 10.0.4.0 255.255.255.0 is configured on R1, it contains both 10.0.4.4/32 (from R4) and the summarized 10.0.4.0/24.
* # Matches Option 4: The routing table contains both 10.0.4.4/32 and 10.0.4.0/24.
* R5 (Inside Area 2 - Stub Area)
* Stub areas do not receive external routes (Type-5 LSAs).
* Since R5 is inside a stub area, it does not contain 10.0.4.4/32 or 10.0.4.0/24.
* # Matches Option 3: The routing table does not contain 10.0.4.4/32 or 10.0.4.0/24.
* R2 (ABR between NSSA and Backbone, but no ASBR summary configured)
* R2 converts Type-7 LSAs from R4 into Type-5 LSAs and advertises them into Area 0.
* Since no ASBR summary is configured on R2, it only sees the specific external route 10.0.4.4
/32 but not the summarized 10.0.4.0/24.
* # Matches Option 1: The routing table contains 10.0.4.4/32 only.
* R3 (Another ABR with ASBR summary configured)
* R3 has asbr-summary 10.0.4.0 255.255.255.0 configured, which means it will summarize the external routes.
* Instead of 10.0.4.4/32, R3 will only have the summarized 10.0.4.0/24 route.
* # Matches Option 2: The routing table contains 10.0.4.0/24 only.
References:
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF Areas (Stub, NSSA, and Backbone)
* OSPF External Route Advertisement and Summarization
* OSPF NSSA Behavior and Type-7 to Type-5 Conversion
NEW QUESTION # 91
What check items can be set in IPSG? (Multiple choice)
- A. MAC address
- B. IP address
- C. VLANID
- D. Outgoing interface
Answer: A,B,C,D
NEW QUESTION # 92
The output information of a router is as follows. Which of the following reasons cause the OSPF adjacency relationship to fail to be established normally? (Multiple choice)
- A. Inconsistent area types
- B. The interval for sending Hello packets is inconsistent
- C. The IP address mask of the interface is inconsistent
- D. Inconsistent area codes
Answer: B,D
NEW QUESTION # 93
The figure shows the debugging information on an OSPF router. Which of the following is the router ID of this router?
- A. 10.0.12.2
- B. 10.0.1.1
- C. 10.0.12.1
- D. 10.0.2.2
Answer: D
NEW QUESTION # 94
What is the Router-ID of OSPFv3?
- A. 100-bit value
- B. 128-bit value
- C. 64-bit value
- D. 32-bit value
Answer: D
NEW QUESTION # 95
As shown in the figure, OSPF is enabled on all interfaces of the router, and the ip address identified in the figure is the device's IP address.
Loopback0 presses the IP address of the port, RI, R2, R3EJLoopbacD is advertised in the area 1, R4 LoopbacfkD advertises in area D and which of the following functional addresses can be pinged between the LoopbackD announcements of R5 and R5 in area 2?
Areal
10.0.1.1/32
- A. 10.0.3.3 10.0.5.5
- B. 10.0.2.2 10.0.5.5
- C. 10.0.2.2and10.0.3.3
- D. 10.0.4.4and10.0.2.2
Answer: C
NEW QUESTION # 96
When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?
- A. existHub&Spokescene, whenHub-CEandHub-PEuseIGPTimeSpoke-PEandSpake-CEcannot makeEBGP
- B. whenPEandCEbetweenBGPWhen exchanging routing information, if twoVPNThe autonomous system the site is in uses the same privateASnumber, can be passed throughASThe number replacement function is to use any specifiedASreplace the received private network route with theASnumber to preventASRoutes are discarded due to duplicate numbers
- C. whenPEandCEbetweenBGPWhen exchanging routing information, you do not need toPEPerform private network route import on theBGPoperation
- D. existCEIn the case of multi-homing, enableBGP ASThe number substitution function may cause routing loops that can be passed throughBGP SoDpreventVPNIntra-site routing loops
Answer: B
NEW QUESTION # 97
The routing policy tools that BGP can use mainly include Filterpolicy and Route-policy. Its Fiterpolicy can only filter routes, and Rote-policy can only modify routes.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION # 98
Which of the following regarding the configuration description is wrong?
- A. If the DHCP request message received by the GigabitEthemnet0/0/1 interface does not contain the SutOption information of Option82, the device will generate Option82 and insert it into the message
- B. Enabling the DHCP Snooping configuration can be used to prevent DHCP Server counterfeiters from attacking
- C. Enabling the DHCP Snooping configuration can be used to prevent ARP spoofing attacks
- D. Configure GigabitEthernet0/0/1 as a trusted interface
Answer: C
NEW QUESTION # 99
On an enterprise network shown in the figure, EBGP is deployed between CEs and PEs.
CE1 sends a VPN route to PE1.
Which of the following statements are false?
Options:
- A. If no additional action is taken, CE3 discards the route.
- B. To enable CE3 to receive the route, run the command peer 10.1.1.1 soo 200:1 on PE1.
- C. If the commands peer 10.1.1.1 soo 200:1 and peer 10.1.2.1 soo 200:1 are run on PE1, CE2 accepts the route.
- D. If the command peer 10.1.3.1 substitute-as is run on PE2, CE3 accepts the route.
Answer: B,C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding Site of Origin (SoO) in MPLS VPNs
* SoO (Site of Origin) is used in MPLS VPNs to prevent loops in multi-homed CE scenarios.
* Routes with the same SoO value are not advertised back to the same site.
2. Analysis of Each Answer Choice
A: "To enable CE3 to receive the route, run the command peer 10.1.1.1 soo 200:1 on PE1." (# False)
* SoO is used to prevent loops by tagging routes that belong to the same site.
* Applying SoO (200:1) on PE1 for CE1 means that any other PE (such as PE2) receiving the route will not advertise it back to the same site (CE1).
* This statement is false because applying SoO here does not directly enable CE3 to receive the route. Instead, CE3 must accept routes with SoO values properly configured.
B: "If the commands peer 10.1.1.1 soo 200:1 and peer 10.1.2.1 soo 200:1 are run on PE1, CE2 accepts the route." (# False)
* SoO ensures that a route received from one CE is not sent back to another CE in the same site.
* If SoO (200:1) is assigned to CE1 and CE2, routes will be blocked because they share the same SoO tag.
* Thus, CE2 will not accept the route, making this statement false.
C: "If the command peer 10.1.3.1 substitute-as is run on PE2, CE3 accepts the route." (# True)
* substitute-as allows a router to replace the received AS number in the AS_PATH with another AS number, ensuring that routes are accepted even when AS_PATH filtering is in place.
* This prevents CE3 from rejecting the route due to AS-Path loop prevention.
* # Thus, this statement is true.
D: "If no additional action is taken, CE3 discards the route." (# True)
* By default, CE3 will discard the route because of BGP loop prevention (same AS in the AS_PATH).
* To allow CE3 to receive the route, the allowas-in or substitute-as command must be configured on PE2.
* # Thus, this statement is true.
3. Evaluating the Answer Choices
Option
Correct?
Reasoning
A
# False
Applying SoO does not directly enable CE3 to receive the route.
B
# False
If both CE1 and CE2 have the same SoO value, CE2 will reject the route.
C
# True
Substitute-AS allows CE3 to accept the route by modifying the AS-Path.
D
# True
Without additional configuration, CE3 will discard the route due to AS-Path loop prevention.
# Correct answer: A and B are false.
Final Conclusion:
* SoO prevents routing loops in MPLS VPN multi-homing.
* CE2 will reject the route if it has the same SoO as CE1.
* CE3 requires the substitute-as or allowas-in command to accept the route.
* Thus, statements A and B are false.
NEW QUESTION # 100
The following six tools cannot be used to match BGP routing entries?
- A. IP Prefix List
- B. advancedA, CL
- C. basicA, CL
- D. Community Filter
Answer: B
NEW QUESTION # 101
After configuring the VLAN-based MAC address drift detection function, if the MAC address drifts, you can configure the actions of the interface according to your needs.
Which of the following is not a configurable action?
- A. Send alert
- B. Flow filtering
- C. MAC address blocking
- D. Interface blocking
Answer: B
NEW QUESTION # 102
According to this figure, it can be known that in VLAN300, 0 MAC drift occurred by 00e0-fc3d-3bdb from 17:22:38 to 17:22.44 on 2020-06-04.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 103
During the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can make the Moni tor terminal no longer pop up the debug message? (Multiple choice)
- A. Open the notepad, enter undo debugging all, copy the command line, and paste it into the Monitor interface
- B. Exit the current Moni tor interface, log in to the device again using SSH to open the new Monitor interface
- C. Open the notepad, enter undo terminal monitor, copy the command line, and paste it into the Monitor interface
- D. Open the notepad, enter undo terminal debugging, copy the command line, and paste it into the Monitor interface
Answer: D
NEW QUESTION # 104
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 IPv6 address prefix of the R2 interface GE0/0/0 is 2001:2343: 23: :/64
- B. The link-local address of the R2 interface GE0/0/0 is FE80::2E0; FCFF:FECD:4F79
- C. The router that generated the LSA is R2
- D. The LSA shows that R2 does not support external routing, but participates in IPv6 routing calculations
Answer: A,B,C
NEW QUESTION # 105
Which description is correct about the label encapsulation format in MPLS? (Multiple choice)
- A. The total length of a single MPLS label is 4 bytes (32 bits)
- B. The S field in the label: 1 bit, used to identify whether the label is the bottom label of the stack, when the value is 1, it indicates the second-to-last label
- C. For Ethernet and PPP packets, the label stack is located between the layer 2 header and the data like a "underlay*": when there is a VLAN tag, the MPLS header is placed between the Ethernet header and the VLAN tag
- D. The TTL field in the label is similar to the TTL (Time To Live.) in the IP packet, and it also has the effect of preventing loops.
Answer: A,D
NEW QUESTION # 106
Which of the following are not included in the security protection actions that a secure MAC address can perform?
- A. Protect
- B. Remark
- C. Restrict
- D. Shutdown
Answer: B
NEW QUESTION # 107
On 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. Which of the following LSAs is displayed only in area 2?
- A. Intra-Area-Prefix-LSA
- B. Router-LSA
- C. AS-External-LSA
- D. Link-LSA
Answer: C
NEW QUESTION # 108
According to this diagram, can we break the
- A. system-IDforee8c.a0c2.baf2The device' whose type isLevel-1
- B. R4belong only toLevel-1
- C. system-IDforee8c.a0c2.baf2device whose type isLevel-1-2
- D. R4dry onlyLevel2
Answer: B,C
NEW QUESTION # 109
......
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