Huawei H12-831_V1.0 Valid Exam Labs & H12-831_V1.0 Paper

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Huawei H12-831_V1.0 Exam Syllabus Topics:

SectionObjectives
Topic 1: MPLS and VPN Technologies- VPN Implementation
  • 1. L3VPN configuration principles
    • 2. Inter-AS VPN scenarios
      - MPLS Fundamentals
      • 1. LDP basics
        • 2. Label switching mechanism
          Topic 2: Advanced Routing Protocols- BGP Configuration and Policy Control
          • 1. Route filtering and policy control
            • 2. BGP attributes and path selection
              - OSPF Advanced Features
              • 1. LSA types and area types
                • 2. Route calculation and optimization
                  Topic 3: Network Design and Troubleshooting- Fault Diagnosis
                  • 1. Routing loop troubleshooting
                    • 2. Protocol convergence issues
                      - Enterprise Network Design
                      • 1. High availability design principles
                        • 2. Hierarchical network architecture
                          Topic 4: Network Services and Optimization- Multicast Technologies
                          • 1. PIM protocol operations
                            • 2. Multicast distribution models
                              - QoS Fundamentals
                              • 1. Congestion management mechanisms
                                • 2. Traffic classification and marking
                                  Topic 5: IP Network Technologies- IS-IS Routing Protocol
                                  • 1. Level-1/Level-2 design
                                    • 2. Route convergence and optimization
                                      - IPv6 Deployment
                                      • 1. IPv6 addressing and transition mechanisms
                                        • 2. Dual-stack and tunneling technologies

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                                          Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q17-Q22):

                                          NEW QUESTION # 17
                                          The network logic architecture of a cutover project is shown in the figure. The purpose of the cutover is to expand a network device R4 between R2 and R3. The OSPF protocol runs between the network devices.

                                          After the physical network is connected, when performing the cutover operation, the network engineer first mistakenly imports the backup configuration of R3 into R4. Based on this scenario, which of the following descriptions are correct? (Multiple choice)

                                          Answer: A,D


                                          NEW QUESTION # 18
                                          When a fault occurs on an OSPF network, traffic can be switched to another path only after several phases.
                                          Sort these phases in the correct sequence.

                                          Answer:

                                          Explanation:

                                          Explanation:

                                          When OSPF detects a failure in the network, it performs a series of actions to ensure traffic is rerouted to a valid path. The phases occur in this strict order:
                                          * # Fault Detection (A)
                                          * OSPF routers use Hello packets to maintain neighbor relationships.
                                          * If a Hello timeout or link down is detected, the fault is immediately recognized.
                                          * # LSA Update (B)
                                          * Upon detecting a failure, the router generates a new LSA (e.g., a Router-LSA or Network-LSA) and floods it to all other routers in the same area.
                                          * This LSA communicates the change in network topology.
                                          * # Route Calculation (C)
                                          * Each router that receives the updated LSAs runs the SPF algorithm to recompute the best path to every destination.
                                          * # Entry Delivery to the FIB (D)
                                          * After recalculating the routes, the router installs the new forwarding entries into the FIB (Forwarding Information Base), allowing data to be forwarded along the new optimal path.
                                          # Official Huawei Reference:
                                          " OSPF convergence after a network failure consists of fault detection, LSA flooding, SPF calculation, and updating the FIB. Each step must be completed for traffic to resume correctly on alternate paths. "
                                          - [Huawei HCIA-Datacom Certification Guide - Chapter: OSPF Convergence and SPF Algorithm]


                                          NEW QUESTION # 19
                                          As shown in the figure, the cost value of the link that all interfaces of the router enable OSPF is identified in the figure. Loogback0 interfect of R2 is advertised in area 0. In area 1, both R2 and R3 will be transmitted in the form of Typae3 LSA 10.0.2.2/32 routing information.

                                          Answer: A


                                          NEW QUESTION # 20
                                          A large-scale BGP network has a large number of peers. Configuring and maintaining these peers is difficult.
                                          You can add the BGP peers with the same configurations to a BGP peer group and then configure the BGP peers in batches to simplify peer management and improve route advertisement efficiency. When configuring an IBGP peer group, you do not need to specify an AS number for the peer group. When configuring an EBGP peer group, you must specify an AS number for the peer group.

                                          Answer: A

                                          Explanation:
                                          In Huawei's implementation of BGP peer groups, the goal is to ease configuration in large-scale BGP deployments. When you define a peer group, all peers within that group inherit common settings.
                                          * For IBGP peer groups, since the peers are in the same AS, you do not need to specify an AS number.
                                          * For EBGP peer groups, since the peers are in different ASes, you must specify the AS number during peer group configuration.
                                          # Official Reference from Huawei:
                                          " When configuring an IBGP peer group, the AS number does not need to be specified because all members belong to the same AS. However, when configuring an EBGP peer group, the peer AS must be explicitly specified. "
                                          - [Huawei HCIA-Datacom Certification Guide - BGP Chapter]


                                          NEW QUESTION # 21
                                          MPLS needs to assign labels to messages in advance and establish an LSP before it can forward messages. LSP is divided into static LSP and dynamic LSP. Which of the following protocols can be used to establish a dynamic LSP? (Multiple choice)

                                          Answer: C,D


                                          NEW QUESTION # 22
                                          ......

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