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Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Exam is a certification exam that tests the knowledge and skills of IT professionals in the field of advanced routing and switching technology. H12-831_V1.0 Exam is designed to help IT professionals demonstrate their expertise in configuring and troubleshooting complex networks, including enterprise-level networks, WANs, and LANs.

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Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Exam is a professional certification exam designed for individuals who wish to validate their knowledge and skills in advanced routing and switching technologies. H12-831_V1.0 exam is designed to test the candidate's ability to plan, design, implement, operate, and troubleshoot complex enterprise-level networks using Huawei's routing and switching technologies. H12-831_V1.0 Exam covers a wide range of topics, including advanced routing protocols, switching technologies, MPLS, VPNs, network security, and network optimization.

Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q363-Q368):

NEW QUESTION # 363
An OSPF network experiences frequent topology changes, leading to excessive CPU usage due to repeated SPF calculations. Which Huawei feature can reduce CPU utilization?

Answer: C


NEW QUESTION # 364
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: D

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 # 365
By default, LDP adjacencies will trigger the establishment of LSP based on the IP routing of the 32bit address.

Answer: A


NEW QUESTION # 366
The output information of a switch is shown in the figure. Which of the following can be determined from this information?

Answer: D


NEW QUESTION # 367
On the network shown in the figure, EBGP peer relationships are established between ASs through directly connected interfaces.
* OSPF is deployed in AS 65456 (with OSPF disabled on interconnected interfaces between ASs).
* R4 and R5 use Loopback0 to establish iBGP peer relationships with R6.
* 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, R2, and R3 import the external route 192.168.1.0/24 into BGP through the import-route command.

Which of the following statements are true?

Answer: A,D

Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the BGP and OSPF Network Topology in the Question:
* External Route Importation
* R1, R2, and R3 import 192.168.1.0/24 into BGP from an external source.
* This means R1, R2, and R3 will advertise this route to their EBGP and iBGP peers.
* BGP Route Selection Criteria
* BGP follows specific rules to determine the best path for a route. The most relevant factors here are:
* Highest Local Preference (LOCAL_PREF) # Preferred
* Shortest AS Path # Preferred
* Lowest Origin Type (IGP < EGP < Incomplete) # Preferred
* Lowest MED (Multi-Exit Discriminator) # Preferred
* Oldest eBGP route (if paths are equal) # Preferred
Route Selection Analysis for Each Statement:
A: For 192.168.1.0/24, R5 preferentially selects the route received from R2. # (Correct)
* R5 is in AS 65456 and peers with R6 using iBGP.
* Since R2 is a central router with direct connectivity to R5, it is the most preferred path compared to indirect paths from R1 or R3.
* By default, R5 will prefer the path from R2 over others unless explicitly influenced by BGP attributes.
# Statement A is correct.
B: For 192.168.1.0/24, R4 preferentially selects the route received from R1. # (Incorrect)
* R4 and R5 use Loopback0 to establish iBGP with R6, meaning they receive BGP routes from multiple sources.
* BGP prefers the shortest AS path, and there is no specific information indicating that R1's path is the shortest for R4.
* R4 may actually prefer another router's advertisement (e.g., R2 or R3) depending on AS path length and other attributes.
# Statement B is incorrect.
C: For 192.168.1.0/24, if the default local-preference 150 command is configured on R3, R5 preferentially selects the route received from R3. # (Correct)
* By default, BGP assigns a local-preference of 100.
* If R3 sets local-preference to 150, it is higher than other routes (R1, R2).
* BGP prefers the highest local-preference value, so R5 will prefer the route received from R3 if this attribute is set.
# Statement C is correct.
D: For 192.168.1.0/24, R6 preferentially selects the route received from R4. # (Incorrect)
* R6 is an iBGP peer of both R4 and R5.
* BGP best-path selection depends on attributes like local-preference, AS-path, and MED.
* There is no explicit information suggesting that R4's advertisement is preferred over R5's.
* R6 may prefer R5's route depending on attributes.
# Statement D is incorrect.
Final Conclusion:
# A. R5 preferentially selects the route received from R2.# B. R4 does not necessarily prefer R1's route.
# C. If R3 sets local-preference 150, R5 will prefer the route from R3.# D. R6 does not necessarily prefer R4's route.
Thus, the correct answers are: A, C.


NEW QUESTION # 368
......

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