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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0 |
| Available Languages: | English, Chinese |
| Exam Price: | USD 180 |
| Exam Format: | Drag and Drop Item, Multiple-answer Question, Short Response Item, Single-answer Question, True or False |
| Related Certifications: | HCIP-Datacom |
| Exam Duration: | 90 minutes |
| Passing Score: | 600/1000 |
| Sample Questions: | Huawei H12-831_V1.0 Sample Questions |
| Exam Way: | Written examination |
| Pre Condition: | It is recommended to complete HCIA-Datacom certification in advance. Prerequisite exam: H12-821 (HCIP-Datacom-Core Technology). |
| Official Syllabus URL: | https://e.huawei.com/en/talent/Halp/#/cert/plan-detail?certCode=HCIP-Datacom-Advanced%20Routing%20&%20Switching%20Technology |
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Huawei H12-831_V1.0-ENU exam covers advanced routing and switching technology topics such as OSPF, BGP, MPLS, QoS, and multicast routing. Candidates who pass H12-831_V1.0 exam will have a comprehensive understanding of these technologies, including their implementation, configuration, and troubleshooting. H12-831_V1.0 exam is also designed to test the candidate's ability to design and implement complex network solutions, as well as their ability to analyze and optimize network performance. Overall, the HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is a valuable credential for professionals who want to demonstrate their expertise in advanced networking technologies.
The H12-831_V1.0 Certification Exam covers a range of topics, including advanced IP routing protocols, MPLS VPNs, and multicast routing technologies. It also tests candidates on their knowledge of advanced switching technologies, such as VLANs, STP, and link aggregation. H12-831_V1.0 exam is designed to test the candidate's ability to design, configure, and troubleshoot complex networks using these technologies.
NEW QUESTION # 125
On the OSPF network shown in the figure:
* Area 1 is a common area.
* Area 2 is a totally NSSA (Not-So-Stubby Area).
* Area 3 is an NSSA.
* R5 imports the external route 10.0.5.5/32 into OSPF.
Which of the following routers have the route 10.0.5.5/32 in their routing tables?
Answer: A,B,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Areas and Route Propagation in the Network:
* OSPF Area Types in the Question:
* Area 0 (Backbone Area): Connects all areas and distributes routing information.
* Area 1 (Standard Area): Regular OSPF area that can receive and forward external routes.
* Area 2 (Totally NSSA - Totally Not-So-Stubby Area):
* Does not allow external routes except for a default route injected by the ABR.
* Area 3 (NSSA - Not-So-Stubby Area):
* Allows external routes as Type 7 LSAs but does not accept Type 5 LSAs.
* How External Routes Are Advertised in This Scenario:
* R5 (in Area 3) imports 10.0.5.5/32 as an external route into OSPF.
* Since Area 3 is an NSSA, the external route is advertised as a Type 7 LSA (not Type 5).
* The ABR (R1) converts the Type 7 LSA into a Type 5 LSA and advertises it into Area 0.
* Once in Area 0, this Type 5 LSA can be distributed to other areas except totally stubby or totally NSSA areas.
Route Distribution Analysis:
* R5 (Area 3) # R1 (Area 0, ABR):
* R5 generates a Type 7 LSA for 10.0.5.5/32.
* R1 (ABR) converts this Type 7 LSA into a Type 5 LSA and injects it into Area 0.
* R2 (Area 0) # R3 (Area 0):
* Since Area 0 allows external Type 5 LSAs, R2 and R3 receive 10.0.5.5/32.# R2 and R3 have the route.
* R6 (Area 1) # Connected to Area 0:
* Area 1 is a common area, meaning it can receive external Type 5 LSAs.# R6 has the route.
* R4 (Area 2 - Totally NSSA):
* Totally NSSA areas do NOT accept Type 5 or Type 7 LSAs.
* Instead, they receive only a default route from the ABR (R3).
* Since R4 does not receive external routes explicitly, it does NOT have 10.0.5.5/32.# R4 does NOT have the route.
Final Conclusion:
* # R2, R3, and R6 have the route 10.0.5.5/32.
* # R4 does not have the route because Area 2 is a Totally NSSA and only gets a default route.
Thus, the correct answer is:# R2, R3, and R6 have the route 10.0.5.5/32 in their routing tables.
NEW QUESTION # 126
On the OSPF network shown in the figure, area 1 is a common area, area 2 is a stub area, and area 3 is an NSSA. R5 imports an external route 10.0.5.5/32. Given this, which of the following routers does not have the route 10.0.5.5/32 in its routing table?
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
In this OSPF network, we need to determine which router does not have the external route 10.0.5.5/32 in its routing table, based on the area types and OSPF behavior for external routes (Type 5 LSAs). Let's break it down step by step:
* Understanding the Network and Area Types:
* The network has multiple areas: Area 0 (backbone area), Area 1 (common area), Area 2 (stub area), and Area 3 (Not-So-Stubby Area or NSSA).
* Area 0 is the backbone area, connecting all other areas.
* Area 1 is a common (regular) area, which allows all types of LSAs, including external routes (Type 5 LSAs).
* Area 2 is a stub area, which does not allow external routes (Type 5 LSAs) to be propagated into it. Instead, a default route (0.0.0.0/0) is injected by the Area Border Router (ABR) to provide connectivity to external destinations.
* Area 3 is an NSSA, which allows limited external routes (Type 7 LSAs, translated to Type 5 LSAs by the ABR) but can block Type 5 LSAs depending on configuration. However, NSSAs typically allow external routes originated within the NSSA to be advertised into Area 0 and other areas.
* External Route Behavior (10.0.5.5/32):
* R5, located in Area 3 (NSSA), imports an external route 10.0.5.5/32. In an NSSA, external routes are advertised as Type 7 LSAs within the NSSA and are translated to Type 5 LSAs by the ABR (e.g., R1 or another router connecting Area 3 to Area 0) before being flooded into Area 0 and other areas.
* Type 5 LSAs (external routes) are flooded throughout the OSPF domain, except into stub areas and, in some cases, NSSAs (depending on configuration). However, stub areas block Type 5 LSAs entirely, replacing them with a default route.
* Analyzing Each Router's Area and Route Propagation:
* R1: Located in Area 0, R1 is an ABR connecting Area 0 to other areas (e.g., Area 1 and Area 3).
As an ABR, R1 receives the Type 7 LSA from R5 in Area 3, translates it to a Type 5 LSA, and floods it into Area 0 and other connected areas (except stub areas). Therefore, R1 will have the route 10.0.5.5/32 in its routing table.
* R2: Located in Area 0, R2 is also in the backbone area and will receive the Type 5 LSA flooded from Area 0. Thus, R2 will have the route 10.0.5.5/32 in its routing table.
* R3: Located in Area 2 (stub area), R3 does not receive Type 5 LSAs because stub areas block external routes. Instead, the ABR (likely R2 or another router connecting Area 2 to Area 0) injects a default route (0.0.0.0/0) into Area 2. Therefore, R3 will not have the specific route
10.0.5.5/32 in its routing table.
* R4: Located in Area 2 (stub area), R4, like R3, is in a stub area and does not receive Type 5 LSAs. It relies on the default route injected by the ABR. Thus, R4 will not have the route 10.0.5.5
/32 in its routing table.
* R5: Located in Area 3 (NSSA), R5 originates the external route 10.0.5.5/32 and advertises it as a Type 7 LSA within Area 3. R5 will have this route in its routing table.
* R6: Located in Area 1 (common area), R6 receives the Type 5 LSA flooded from Area 0 (via R1 or another ABR). Therefore, R6 will have the route 10.0.5.5/32 in its routing table.
* Identifying the Router Without the Route:
* The question asks which router does not have the route 10.0.5.5/32 in its routing table.
* R3 and R4 are both in Area 2 (stub area), which blocks Type 5 LSAs. Therefore, neither R3 nor R4 will have the route 10.0.5.5/32.
* R6 (Area 1, common area) and R2 (Area 0, backbone) will have the route, as will R1 (Area 0 and ABR) and R5 (Area 3, NSSA, originator).
* The options provided are R6, R3, R4, and R2. Among these, R3 and R4 do not have the route, but we need to select one correct answer from the options. Given the typical focus of such questions on identifying a single router in a stub area, and considering the placement of R4 in the diagram (Area 2), R4 is the most likely answer, as it is clearly in the stub area and isolated from external routes.
* Conclusion:
* R4, located in Area 2 (stub area), does not have the route 10.0.5.5/32 in its routing table because stub areas block Type 5 LSAs, and only a default route is provided by the ABR.
* Therefore, the correct answer is C (R4).
References (Based on HCIP-Datacom-Advanced Routing & Switching Technology Concepts):
* OSPF Area Types: HCIP-Datacom documentation on OSPF area configurations, including stub areas, NSSAs, and common areas (e.g., Section on OSPF LSA Types and Area Restrictions).
* External Route Propagation: HCIP-Datacom coverage of Type 5 and Type 7 LSAs, their flooding behavior, and restrictions in stub and NSSA areas (e.g., Chapter on Advanced OSPF Features).
* ABR and ASBR Roles: HCIP-Datacom explanation of Area Border Routers (ABRs) and Autonomous System Boundary Routers (ASBRs) in OSPF networks (e.g., Section on Route Redistribution and External Route Handling).
NEW QUESTION # 127
Engineer Guan used two routers to test IPv6 services. By running the BGP4+ module to communicate with the branch, as shown in Juxin, an engineer captured packets to view the Updte packets sent by R1. Which of the following statements is true about the description of the message information?
Answer: A,B,D
NEW QUESTION # 128
OSPFV2 is an IGP running on an IPv4 network; OSPFV3 is an IGPo running on an IPv6 network. The basic working mechanism of OSPFv3 is the same as that of OSPFV2, such as the election of DR and B, DR. As shown in the figure, an engineer uses 3 routers to test IPv6 services. He wants to realize the interconnection of IPv6 networks by running OSPFV3.
Pass. Which of the following statements about the election of the network DR is correct?
Answer: D
NEW QUESTION # 129
Each OSPFv3 router generates a Link-LSA for each link, describing information such as the link- local address, IPv6 prefix address, and interface number on this link, and provides link options to be set in the Network-LSA, which is only propagated within this link.
Answer: A
NEW QUESTION # 130
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