Quiz H12-831_V1.0-ENU - Professional HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Reliable Test Testking

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

Section Objectives
Topic 1: 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
          Topic 2: Advanced Routing Protocols - OSPF Advanced Features
          • 1. LSA types and area types
            • 2. Route calculation and optimization
              - BGP Configuration and Policy Control
              • 1. BGP attributes and path selection
                • 2. Route filtering and policy control
                  Topic 3: MPLS and VPN Technologies - MPLS Fundamentals
                  • 1. LDP basics
                    • 2. Label switching mechanism
                      - VPN Implementation
                      • 1. L3VPN configuration principles
                        • 2. Inter-AS VPN scenarios
                          Topic 4: 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
                                  Topic 5: 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

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                                          Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q125-Q130):

                                          NEW QUESTION # 125
                                          The figure shows the output information on a switch.
                                          Which of the following can be determined from the information?

                                          • A. When the average rate of unknown multicast packets is 1500 pps, GE0/0/1 blocks the multicast packets.
                                          • B. After broadcast packets are blocked on GE0/0/1, broadcast packets are forwarded only when their average rate is lower than 1000 pps.
                                          • C. The administrator configures traffic suppression on GE0/0/1 of the switch.
                                          • D. When the average rate of known unicast packets is 2500 pps, GE0/0/1 is shut down.

                                          Answer: C

                                          Explanation:
                                          Comprehensive and Detailed In-Depth Explanation:
                                          Understanding the Table and Traffic Suppression Configuration
                                          Port Name
                                          Type
                                          Rate (Min/Max)
                                          Mode
                                          Action
                                          Punish-Status
                                          Trap
                                          Log
                                          Int
                                          Last-Punish-Time
                                          GE0/0/1
                                          Broadcast
                                          1000 / 2000
                                          Pps
                                          Block
                                          Normal
                                          Off
                                          On
                                          90
                                          -
                                          GE0/0/1
                                          Multicast
                                          1000 / 2000
                                          Pps
                                          Block
                                          Normal
                                          Off
                                          On
                                          90
                                          -
                                          GE0/0/1
                                          Unicast
                                          1000 / 2000
                                          Pps
                                          Block
                                          Normal
                                          Off
                                          On
                                          90
                                          -
                                          Key Observations from the Table:
                                          * Traffic suppression (or rate limiting) is configured on interface GE0/0/1 for broadcast, multicast, and unicast traffic.
                                          * Thresholds:
                                          * Min rate: 1000 pps (packets per second)
                                          * Max rate: 2000 pps
                                          * If the traffic exceeds the configured threshold (2000 pps), the action is to "Block".
                                          * The interface is still "Normal" (not shut down), meaning exceeding 2000 pps does not disable the port.
                                          * Logging is enabled (Log: On), but trapping (Trap: Off) is disabled.
                                          Analysis of Each Answer Choice
                                          A: "When the average rate of unknown multicast packets is 1500 pps, GE0/0/1 blocks the multicast packets." # (False)
                                          * The blocking threshold for multicast is 2000 pps (Max rate).
                                          * If the rate is 1500 pps, it is still below the threshold, so traffic is not blocked yet.
                                          # Statement A is incorrect.
                                          B: "When the average rate of known unicast packets is 2500 pps, GE0/0/1 is shut down." # (False)
                                          * The table does not indicate that exceeding the max threshold (2000 pps) shuts down the interface.
                                          * Instead, it simply blocks packets exceeding the rate limit.
                                          * The interface remains "Normal", meaning it is not shut down.
                                          # Statement B is incorrect.
                                          C: "After broadcast packets are blocked on GE0/0/1, broadcast packets are forwarded only when their average rate is lower than 1000 pps." # (False)
                                          * The minimum rate is 1000 pps, but there is no indication that traffic resumes forwarding only when it drops below this rate.
                                          * The configuration only states blocking when exceeding 2000 pps, but does not enforce a strict reactivation at 1000 pps.
                                          # Statement C is incorrect.
                                          D: "The administrator configures traffic suppression on GE0/0/1 of the switch." # (True - Correct Answer)
                                          * The table explicitly shows that a traffic suppression policy is applied to broadcast, multicast, and unicast packets on GE0/0/1.
                                          * This confirms that the administrator has configured traffic suppression (rate limiting) on this interface.
                                          # Statement D is correct.
                                          Final Conclusion:
                                          # Correct answer: D. The administrator configures traffic suppression on GE0/0/1 of the switch.


                                          NEW QUESTION # 126
                                          IS-IS LSP fragments are identified by the LSP Number field their LSP IDs. This field Is 4 bits long.
                                          Therefore, an -is process can generate a minimum of 256 LSP fragments, which means only a limited amount of information can be carried. By adding additional system 1Ds, you can enable the 1515 process o generate more LSP fragments.

                                          • A. FALSE
                                          • B. TRUE

                                          Answer: A

                                          Explanation:
                                          The statement contains two material technical errors. The LSP Number field is one byte, or 8 bits , not 4 bits.
                                          An 8-bit field provides values from 0 through 255, allowing an IS-IS process to generate a maximum of 256 original LSP fragments for a system ID. Four bits would allow only 16 values and could not identify 256 fragments.
                                          The statement also incorrectly says "a minimum of 256 LSP fragments." The correct term is maximum : the process can generate up to 256 fragments under its normal system ID; it is not required to generate at least
                                          256.
                                          The final concept is correct: IS-IS LSP fragment extension permits additional system IDs to be configured.
                                          Each additional system ID provides space for another 256 extended LSP fragments, enabling the originating IS-IS process to advertise more link-state information.
                                          Because a true/false statement must be correct in its entirety, the incorrect field length and "minimum" wording make the supplied statement false. The corrected version would state: "The LSP Number field is one byte long, allowing a maximum of 256 LSP fragments per system ID." Huawei IS-IS LSP Fragment Extension


                                          NEW QUESTION # 127
                                          When there are multiple equal-cost routes to the same destination address, BGP equal-cost load balancing can be used to achieve the purpose of balancing traffic. However, IBGP routes and EBG routes to the same destination in the public network cannot form load balancing.

                                          • A. False
                                          • B. True

                                          Answer: B


                                          NEW QUESTION # 128
                                          BFDLink state detection at the heart (millisecond) level can be achieved.

                                          • A. right
                                          • B. wrong

                                          Answer: A


                                          NEW QUESTION # 129
                                          On the network shown in the figure, single-hop BFD is configured on R1 and R2. A network engineer finds that the BFD session goes down. To locate the fault, the network engineer queries the BFD configurations on R1 and R2. According to the configuration information marked in the figure, it can be determined that the mismatched time parameter settings on R1 and R2 causes the BFD session to go down.

                                          • A. FALSE
                                          • B. TRUE

                                          Answer: A

                                          Explanation:
                                          # Configuration Snapshot:
                                          On R1:
                                          bash
                                          CopyEdit
                                          bfd toR2 bind peer-ip 10.0.12.2
                                          discriminator local 1
                                          discriminator remote 2
                                          min-tx-interval 1500
                                          min-rx-interval 1500
                                          On R2:
                                          bash
                                          CopyEdit
                                          bfd toR1 bind peer-ip 10.0.12.1
                                          discriminator local 2
                                          discriminator remote 1
                                          # Observation:
                                          * On R1 , both min-tx-interval and min-rx-interval are configured: 1500ms
                                          * On R2 , no timing parameters are explicitly set (defaults are used)
                                          # BFD Timing Behavior (Huawei):
                                          * BFD is bidirectional and can work even if only one side configures the timers .
                                          * As long as the peer can handle the intervals (i.e. doesn't violate capabilities), the session should still come up .
                                          * This is not a mismatch fault . It ' s valid to set time parameters only on one side.
                                          # Therefore, the time parameter mismatch is NOT the reason the session goes down.
                                          # Final answer: B. FALSE
                                          Root Cause (Likely):
                                          * The real cause might be something else (e.g., interface down, ACL blocking BFD packets, wrong IP, or unidirectional loss).
                                          * But not mismatched timers - they are allowed.
                                          Official Huawei Extract:
                                          " If only one end of the BFD session specifies the detection intervals, the BFD session can still be established. Huawei devices accept remote minimum intervals and negotiate accordingly. "
                                          - [Huawei HCIA-Datacom Certification Guide - BFD Session Configuration and Troubleshooting]


                                          NEW QUESTION # 130
                                          ......

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