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Huawei H12-831_V1.0 Exam Syllabus Topics:

SectionObjectives
MPLS and VPN Technologies- MPLS Fundamentals
  • 1. LDP basics
    • 2. Label switching mechanism
      - VPN Implementation
      • 1. L3VPN configuration principles
        • 2. Inter-AS VPN scenarios
          IP Network Technologies- IS-IS Routing Protocol
          • 1. Level-1/Level-2 design
            • 2. Route convergence and optimization
              - IPv6 Deployment
              • 1. Dual-stack and tunneling technologies
                • 2. IPv6 addressing and transition mechanisms
                  Network Design and Troubleshooting- Fault Diagnosis
                  • 1. Protocol convergence issues
                    • 2. Routing loop troubleshooting
                      - Enterprise Network Design
                      • 1. Hierarchical network architecture
                        • 2. High availability design principles
                          Advanced Routing Protocols- OSPF Advanced Features
                          • 1. Route calculation and optimization
                            • 2. LSA types and area types
                              - BGP Configuration and Policy Control
                              • 1. Route filtering and policy control
                                • 2. BGP attributes and path selection
                                  Network Services and Optimization- QoS Fundamentals
                                  • 1. Congestion management mechanisms
                                    • 2. Traffic classification and marking
                                      - Multicast Technologies
                                      • 1. Multicast distribution models
                                        • 2. PIM protocol operations

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                                          Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q99-Q104):

                                          NEW QUESTION # 99
                                          Which of the following commands can be configured on an IS-IS Level-1-2 device to prevent the Level-1 device from generating a default route?

                                          Answer: B


                                          NEW QUESTION # 100
                                          On the OSPF network shown in the figure, the cost values of links are marked. OSPF IP FRR is enabled on R1, and the maximum load-balancing 8 command is configured in the OSPF process. If a service passes through the path R1 # R5 # R3 to reach 10.0.3.3/32, which of the following is the backup outbound interface for the service?

                                          Answer: D

                                          Explanation:
                                          Comprehensive and Detailed In-Depth Explanation:
                                          Step 1: Identify the Primary Path
                                          * The shortest OSPF cost to 10.0.3.3/32 from R1 is through R5:
                                          * R1 # R5 (Cost 10) # R3 (Cost 10) = Total Cost 20
                                          * The primary outbound interface from R1 to R5 is GE0/0/1.
                                          Step 2: Identify the Backup Path (OSPF IP FRR & ECMP)
                                          * OSPF IP Fast Reroute (FRR) provides a backup next-hop in case the primary link (R1 # R5) fails.
                                          * A feasible backup path must have a cost equal to or close to the primary path, but it must avoid the same failure point.
                                          Alternative Path Calculation:
                                          * Path 1 (R1 # R2 # R3)
                                          * R1 # R2 (Cost 10), R2 # R3 (Cost 10) # Total Cost = 20 #
                                          * Uses interface GE0/0/2 on R1.
                                          * Path 2 (R1 # R4 # R3)
                                          * R1 # R4 (Cost 10), R4 # R3 (Cost 10) # Total Cost = 20 #
                                          * Uses interface GE0/0/3 on R1.
                                          Final Decision on the Backup Interface
                                          * Since both paths R1 # R2 # R3 and R1 # R4 # R3 have equal costs, either can be used for backup.
                                          * However, R1 # R2 # R3 shares a direct cost path with R5, meaning it may not be preferred as a full FRR backup.
                                          * The best backup outbound interface in this scenario is GE0/0/3 (R1 # R4 # R3).
                                          Final answer: # C (GE0/0/3)
                                          References:
                                          * HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPF IP FRR (Fast Reroute) Mechanism
                                          * OSPF Equal-Cost Multi-Path (ECMP) and Backup Route Selection
                                          * OSPF Route Calculation and Best-Path Selection


                                          NEW QUESTION # 101
                                          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: A


                                          NEW QUESTION # 102
                                          On the network shown in the figure, IS-IS IPv6 runs on R2, R6, and R3, and the IPv6 address of Loopback0 on R6 is 2000::6/128. OSPFv3 runs on other links. Area 1 is a stub area, and area 2 is an NSSA. ISIS routes are imported to OSPFv3 on R2 and R3. Which of the following methods can enable R4 to ping 2000: :6?

                                          Answer: A,B,C,D

                                          Explanation:
                                          All four methods can provide the required return path. R2 and R3 import the IS-IS route 2000::6/128 into OSPFv3, allowing R4's Echo Request to reach R6. The remaining requirement is a route on Level-1 router R6 for returning the Echo Reply toward R4, because the OSPFv3 routes are not imported back into IS-IS.
                                          The command:
                                          ipv6 default-route-advertise always level-1
                                          unconditionally originates an IPv6 default route in a Level-1 LSP. Configuring it on either R2 or R3 enables R6 to install ::/0 through that router.
                                          The alternative command:
                                          attached-bit advertise always
                                          forces a Level-1-2 router to set the ATT bit in its Level-1 LSP. When Level-1 router R6 receives an LSP with ATT set, it creates a default route toward the advertising Level-1-2 router. Both R2 and R3 are Level-1-2 routers and participate in the OSPFv3 domain, so either can forward R6's return traffic toward R4.
                                          Thus, either default-route mechanism can be configured on either R2 or R3, making all four options valid.
                                          Huawei IS-IS command reference


                                          NEW QUESTION # 103
                                          In the network shown in the figure, R1 and R2 are configured with single-hop BFD detection. The network engineer found that the BFD session was Down, so he queried the configuration related to R1 and R2 BD. The configuration information has been marked in the figure. According to the configuration information, the reason for the BFD session Down is that the time parameters configured on R1 and R2 do not match.

                                          Answer: A


                                          NEW QUESTION # 104
                                          ......

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