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Huawei H12-831_V1.0 Exam Syllabus Topics:

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

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                                          最新的 HCIP-Datacom H12-831_V1.0 免費考試真題 (Q104-Q109):

                                          問題 #104
                                          On an enterprise network shown in the figure, if CE2 is dual-homed to PE2 and PE3, a routing loop may occur during the exchange of Type 5 LSAs (External LSAs in OSPF).
                                          To prevent the loop, the route-tag command can be run on PE2 and PE3.
                                          In this way, if the route tag of the route received by PE3 is the same as that configured locally, the route is ignored.

                                          Is this statement True or False?

                                          答案：B

                                          解題說明：
                                          Comprehensive and Detailed In-Depth Explanation:
                                          1. Understanding the Issue of OSPF Type 5 LSAs in a Dual-Homed CE Scenario
                                          * OSPF Type 5 LSAs (External LSAs) are used in OSPF to advertise external routes, such as those learned via BGP or redistributed from another protocol.
                                          * In a dual-homed CE setup, like the one in the figure, CE2 connects to both PE2 and PE3 using OSPF.
                                          * PE2 and PE3 both redistribute BGP routes into OSPF and advertise them to CE2.
                                          * CE2 then forwards these LSAs between PE2 and PE3, potentially causing a routing loop because each PE may re-learn its own previously advertised routes.
                                          2. How Route Tags Prevent Loops in OSPF-BGP Redistribution
                                          * The route-tag command assigns a tag to redistributed routes.
                                          * When a router receives an external OSPF LSA (Type 5), it checks the route tag.
                                          * If the route tag matches the locally configured tag, the router ignores the route to prevent loops.
                                          Example Configuration on PE Routers:
                                          plaintext
                                          CopyEdit
                                          PE2:
                                          router ospf 1
                                          import-route bgp 100 route-tag 65001
                                          PE3:
                                          router ospf 1
                                          import-route bgp 100 route-tag 65001
                                          * Both PE2 and PE3 tag their redistributed BGP routes with 65001.
                                          * If PE3 receives an LSA from CE2 with the tag 65001, it ignores it (because it knows it originally advertised it).
                                          # This prevents OSPF from incorrectly preferring a route that was originally sourced from itself, avoiding routing loops.
                                          3. Evaluating the Answer Choices
                                          # TRUE: If the route tag of the received route matches the locally configured tag, the route is ignored, preventing loops.# FALSE: The statement is correct, so False is incorrect.
                                          Thus, the correct answer is: A. TRUE
                                          Final Conclusion:
                                          # The statement is TRUE because route tagging is a valid method to prevent OSPF Type 5 LSA loops in dual-homed scenarios.


                                          問題 #105
                                          When a network device encounters any of the following faults, the network device will report the error message with OID 1.3.6.1.4.1.2011.5.25.155.31.3 (node name hwOspfv2IntraAreaRouteridConflict) to the network management server through SNWP?

                                          答案：B


                                          問題 #106
                                          In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.XX, and the AS number is
                                          6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.

                                          If the "ageregate 192.168.1.016 detail-suppresed command" is configured on R1, which of the following is the traffic path from R3 to 192.168.1.0/24?

                                          答案：D


                                          問題 #107
                                          A certain park deployed both IPv4 and IPv6 networks for service testing, and IS-IS was run to achieve network interconnection. IS-IS routing protocol has good scalability and is widely used in existing networks.
                                          Regarding IS-IS scalability, which of the following statements are correct? (Multiple choice)

                                          答案：A,B,C


                                          問題 #108
                                          R1, R2, and R3 introduce the external network 192.168.1.0/24 into BGP through the import method.

                                          Which of the following descriptions are correct by default? (Multiple choice)

                                          答案：B,C,D


                                          問題 #109
                                          ......

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