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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:

SectionObjectives
Network Design and Troubleshooting- Fault Diagnosis
  • 1. Routing loop troubleshooting
    • 2. Protocol convergence issues
      - Enterprise Network Design
      • 1. Hierarchical network architecture
        • 2. High availability design principles
          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 Services and Optimization- Multicast Technologies
                  • 1. Multicast distribution models
                    • 2. PIM protocol operations
                      - QoS Fundamentals
                      • 1. Traffic classification and marking
                        • 2. Congestion management mechanisms
                          MPLS and VPN Technologies- VPN Implementation
                          • 1. L3VPN configuration principles
                            • 2. Inter-AS VPN scenarios
                              - MPLS Fundamentals
                              • 1. Label switching mechanism
                                • 2. LDP basics
                                  IP Network Technologies- IPv6 Deployment
                                  • 1. Dual-stack and tunneling technologies
                                    • 2. IPv6 addressing and transition mechanisms
                                      - IS-IS Routing Protocol
                                      • 1. Route convergence and optimization
                                        • 2. Level-1/Level-2 design

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                                          Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q187-Q192):

                                          NEW QUESTION # 187
                                          When the switch is configured with port isolation function, by default, different hosts belonging to the same VLAN cannot communicate at layer 1 and layer 3.

                                          Answer: B


                                          NEW QUESTION # 188
                                          LDP sessions have been established between three devices on an MPLS network. Which of the following operations will cause the local LDP session to be re-established?

                                          Answer: B,C

                                          Explanation:
                                          LDP establishes and maintains sessions between Label Switching Routers (LSRs) to exchange label bindings and construct Label Switched Paths.
                                          An LDP session relies on a TCP connection established using the transport addresses advertised by its participating routers.
                                          Changing the LDP transport address affects the session ' s transport endpoint and can require the session to be terminated and re-established using the new address.
                                          Changing the label advertisement mode also affects fundamental LDP negotiation and label distribution behaviour. Huawei documentation explicitly states that modifying this mode causes LDP sessions to be re- established.
                                          Configuring Penultimate Hop Popping (PHP) changes label forwarding behaviour rather than the established LDP session itself.
                                          Similarly, changing the MPLS TTL processing mode does not inherently require LDP session renegotiation.
                                          Therefore, changing the LDP transport address and label advertisement mode are the applicable operations.


                                          NEW QUESTION # 189
                                          On the network shown in the figure, OSPF runs on R1, R2, and R3, and R1 and R3 use loopback interfaces to establish an IBGP peer relationship. BFD is enabled in the BGP process. The minimum interval for sending BFD packets is 1000 ms, the minimum interval for receiving BFD packets is 1000 ms, and the detection multiplier is 6. If OSPF is disabled on GE0/0/1 of R2 using the undo network x.x.x.x y.y.y.y command, which of the following is the longest period after which the BGP peer relationship of R1 will change from Up to Down?

                                          Answer: D

                                          Explanation:
                                          Bidirectional Forwarding Detection (BFD) provides rapid connectivity-failure detection independently of BGP ' s normal Keepalive and Hold timers.
                                          In this topology, R1 and R3 establish an IBGP relationship through loopback interfaces, with R2 providing intermediate connectivity through OSPF.
                                          Disabling OSPF on R2 ' s GE0/0/1 interface disrupts the routing information required to maintain the end-to- end IBGP connection. Once BFD packets can no longer reach the peer, the BFD detection timer determines when the session failure is reported.
                                          The configured detection interval is 1000 milliseconds, and the detection multiplier is 6.
                                          Therefore, the detection period is:
                                          \[ 1000\text{ ms}\times6=6000\text{ ms}=6\text{ s} \]
                                          BFD can notify BGP of the failure without waiting for the normal BGP Hold timer to expire. The intended answer is D.


                                          NEW QUESTION # 190
                                          In an IPLS network, when the S field value of the MPLS message received by the Egress device is (), it indicates that the label is the bottom label of the stack and IP forwarding is performed directly.

                                          Answer: A


                                          NEW QUESTION # 191
                                          In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R6Loopback0 interface is 2000::6/128. The Router ID of each device is 10.0.XX, where X is the device number.

                                          Which of the following descriptions is wrong?

                                          Answer: D


                                          NEW QUESTION # 192
                                          ......

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