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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0-ENU |
| Exam Format: | Multiple-choice questions, Case-based questions, Single-choice questions, Drag and drop |
| Exam Duration: | 90 minutes |
| Passing Score: | 600/1000 |
| Related Certifications: | HCIA-Datacom HCIP-Datacom |
| Exam Price: | $200 USD (varies by region) |
| Available Languages: | Chinese, English |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 60-70 |
| Recommended Training: | HCIP-Datacom Official Training |
| Exam Registration: | Huawei Certification Official Portal |
| Sample Questions: | Huawei H12-831_V1.0-ENU Sample Questions |
| Exam Way: | Online proctored exam or authorized testing center (onsite) |
| Pre Condition: | Recommended completion of HCIA-Datacom or equivalent networking knowledge |
| Official Syllabus URL: | https://e.huawei.com/en/talent/ |
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Huawei H12-831_V1.0 certification exam is intended for IT professionals who have a minimum of two years of experience working with Huawei routers and switches. H12-831_V1.0-ENU exam is designed to test the candidate's ability to design, implement, and troubleshoot complex network solutions using Huawei technologies. Candidates who Pass H12-831_V1.0-ENU Exam will be recognized as experts in advanced routing and switching technology and will be able to design and implement complex network solutions using Huawei technologies.
NEW QUESTION # 25
OSPF neighbors periodically send Hello messages to establish and maintain adjacency, and the interval of the Hello timer must be consistent, otherwise the adjacency cannot be established. In order to accelerate OSPF convergence, network engineers can set the interval of the Hello message to 1ms.
Answer: B
NEW QUESTION # 26
R1 forwards a packet with the destination IP address of 4.4.4.4 on an MPLS network.
* Some LSP (Label Switched Path) information of R3 is shown in the figure.
* During packet transmission, which of the following devices perform MPLS label operations?
Answer: A,B,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine which devices perform MPLS label operations, we need to analyze MPLS forwarding behavior based on the roles of each router in the MPLS domain.
1. Understanding MPLS Label Operations
MPLS label switching involves three main operations:
* Label Push (Ingress LSR - Label Imposition): The ingress router (R1) assigns an MPLS label to the packet.
* Label Swap (Transit LSR - Label Forwarding): The transit routers (R2, R3) swap the label for the next- hop router.
* Label Pop (Egress LSR - Label Disposition): The egress router (R4) removes the MPLS label before forwarding the packet to its final destination.
2. Examining MPLS Roles of Each Router
# R1 (Ingress LSR) # Performs Label PUSH
* R1 adds an MPLS label (1025) to the IP packet and forwards it to R2.
* Operation: Push MPLS Label (Label Imposition).
* # R1 performs MPLS label operations.
# R2 (Transit LSR) # Performs Label SWAP
* R2 receives a labeled packet (1025) from R1, swaps it with label 1026, and forwards it to R3.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R2 performs MPLS label operations.
# R3 (Transit LSR) # Performs Label SWAP
* R3 receives label 1026 and swaps it with label 3, then forwards it to R4.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R3 performs MPLS label operations.
# R4 (Egress LSR) # Does NOT Perform MPLS Operations
* R4 is the egress router and does not forward the packet further using MPLS.
* The last router removes the MPLS label (Pop) and forwards the plain IP packet.
* R4 is NOT performing MPLS label switching (swap or push), only popping the label before delivering the packet.
* # R4 does NOT perform MPLS label operations.
NEW QUESTION # 27
The figure shows the debugging information on an OSPF router. Which of the following is the router ID of this router?
Answer: D
NEW QUESTION # 28
On the OSPF network shown in the figure, areas 1, 2, and 3 are common areas. The IP address of Loopback0 on R5 is 10.0.5.5/32 , and OSPF is enabled on the interface using the network command.
ACL 2000 (with the matching rule shown in the figure) is configured on all routers. If the command filter
2000 import is run in area 0 (where R1, R2, and R3 reside), which of the following routers do not have the route 10.0.5.5/32 in their routing tables?
Answer: A,B,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the OSPF Network Structure in the Question:
* OSPF Areas & Routers:
* Area 3 : Contains R5 (which has loopback 10.0.5.5/32).
* Area 1 : Contains R6 .
* Area 2 : Contains R4 .
* Area 0 (Backbone Area) : Contains R1, R2, and R3 (which interconnect the other areas).
* ACL 2000 Filtering Rule:
* The ACL rule 2000 explicitly denies 10.0.5.5/32 from being imported.
* The filter 2000 import command applies this filter to Area 0 , preventing routes from Area 3 (including R5 ' s loopback) from being learned by Area 0 routers (R1, R2, and R3) .
Route Distribution Analysis:
* R5 (Area 3) :
* R5 has 10.0.5.5/32 configured on its Loopback0.
* Since OSPF is enabled, R5 advertises the route to R6 in Area 1 .
* R6 (Area 1) # R2 (Area 0, Backbone Router) :
* Without filtering , R6 would normally propagate 10.0.5.5/32 to R2 (since R2 is a backbone router in Area 0).
* However, since ACL 2000 is applied in Area 0, R2 blocks this route from being imported.
* Therefore, R2 does not learn 10.0.5.5/32 .
* R2 # R1 and R3 (Both in Area 0):
* R2 would typically share any learned routes with R1 and R3 in Area 0.
* But since R2 itself does not have 10.0.5.5/32 , neither R1 nor R3 can receive it.
* Thus, R1 and R3 also do not have 10.0.5.5/32 in their routing tables.
* R4 (Area 2) is Unaffected:
* Since R4 is in Area 2 , it is not directly impacted by the filter applied in Area 0.
* It can still receive the route via another path if redistribution is configured properly .
Final Conclusion:
* R1, R2, and R3 do not have the 10.0.5.5/32 route due to the filter 2000 import command applied in Area 0 .
* R4 may still have the route since it is not affected by the filtering in Area 0.
Thus, the correct answer is:
# R1, R3, R2 do not have the route 10.0.5.5/32 in their routing tables.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF Route Filtering Mechanisms Huawei Official HCIP-Datacom Study Guide - OSPF Inter-Area Route Advertisement and Filtering Huawei Documentation on filter import and ACL-based OSPF route filtering
NEW QUESTION # 29
As shown in the figure, OSPF is enabled on all interfaces of the router, in which R4 and R5 can establish OSPF virtual connections.
Answer: B
NEW QUESTION # 30
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