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

SectionWeightObjectives
Topic 1: Network O&M7%- Configuration management and backup
- Log and alarm management
- Network monitoring and performance analysis
- Routine maintenance procedures
Topic 2: Network Troubleshooting10%- Performance and service fault resolution
- Structured troubleshooting methodology
- Routing protocol fault diagnosis
- Switching and link fault handling
Topic 3: Advanced IGP Features17%- OSPF advanced features
  • 1. Fast convergence technologies
    • 2. Special area types and applications
      • 3. Route summarization and filtering
        - IS-IS advanced features
        • 1. Level-1/Level-2 routing control
          • 2. Route aggregation
            • 3. Convergence optimization
              Topic 4: Network Cutover7%- Pre-cutover verification
              - Implementation and rollback strategy
              - Post-cutover validation
              - Cutover planning and risk assessment
              Topic 5: Advanced BGP Features10%- Route reflectors and confederations
              - Routing policies and filtering
              - BGP route selection and attributes
              - BGP multi-homing and load balancing
              Topic 6: MPLS Technologies19%- MPLS VPN (L3VPN, L2VPN)
              - LDP and RSVP-TE protocols
              - MPLS OAM and protection
              - MPLS fundamentals and label distribution
              Topic 7: Advanced Ethernet Technologies10%- Ethernet link aggregation and reliability
              - QinQ and VLAN mapping
              - Port isolation and security features
              - VLAN aggregation and MUX VLAN
              Topic 8: IPv6 Routing20%- OSPFv3 and IS-IS for IPv6
              - BGP4+ for IPv6
              - IPv6 address planning and configuration
              - Transition mechanisms (dual-stack, tunnel, translation)

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              Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions (Q90-Q95):

              NEW QUESTION # 90
              On a stable network that requires fast route convergence, you can change the value of the interval at which OSPF LSAs are updated to 0 so that topology or route changes can be immediately advertised on the network through LSAs, which speeds up route convergence.

              Answer: B


              NEW QUESTION # 91
              When an IP packet passes through an MPLS network, an MPLS device processes the TTL value in the packet.
              If the pipe mode is used in the topology shown in the figure, which of the following is the TTL value in the IP packet?

              Options:

              Answer: D

              Explanation:
              Comprehensive and Detailed In-Depth Explanation:
              1. Understanding MPLS TTL Processing
              * TTL (Time to Live) is an IP field that prevents routing loops by decrementing at each hop.
              * In an MPLS network, the TTL field can be processed in two modes:
              * Uniform Mode (Default Mode)
              * Pipe Mode (TTL is preserved in the MPLS domain)
              2. TTL Processing in Pipe Mode
              Pipe mode is used to prevent the MPLS backbone from affecting the TTL of an IP packet.
              * When an IP packet enters the MPLS domain, the original TTL is copied into the MPLS header.
              * Inside the MPLS network:
              * MPLS labels use their own TTL values, and the IP TTL is not decremented.
              * Each P router (transit router) decrements only the MPLS TTL, not the IP TTL.
              * When the packet leaves the MPLS domain (at PE2):
              * The original IP TTL is restored but decremented by 1 as it exits to CE2.
              3. Analyzing the TTL Behavior in the Given Topology
              * Initial IP TTL from CE1 = 255
              * At PE1:
              * IP TTL remains 255 as it is copied into the MPLS label.
              * MPLS TTL starts at 255 (same as IP TTL).
              * At P Router:
              * MPLS TTL is decremented (255 # 254).
              * IP TTL remains unchanged (255) because of Pipe mode.
              * At PE2 (Egress Router):
              * IP TTL is restored and decremented by 1 (255 # 254).
              Thus, the correct sequence is:# IP TTL: 255 # 255 # 254
              4. Evaluating the Answer Choices
              Option
              TTL Values
              Correct?
              Reasoning
              A
              255 # 254 # 252
              # Incorrect
              IP TTL should remain 255 inside MPLS
              B
              254 # 253 # 252
              # Incorrect
              IP TTL starts at 255, not 254
              C
              255 # 255 # 254
              # Correct
              IP TTL is preserved in pipe mode inside MPLS and decremented only at egress.
              D
              254 # 254 # 253
              # Incorrect
              Initial IP TTL should be 255, not 254
              # Correct answer: C. 255 # 255 # 254
              Final Conclusion:
              * Pipe mode ensures that the MPLS domain does not affect the IP TTL while the packet is inside the MPLS network.
              * Only the egress PE (PE2) decrements the IP TTL before forwarding the packet to CE2.
              * Thus, the correct TTL sequence is 255 # 255 # 254.


              NEW QUESTION # 92
              As shown in the figure, the VRRP virtual IP address of network R1 and R2 is configured as
              10.0.12.254. After the configuration is completed, the network engineer checks the VRRP status on R1 and R2. Both devices are in the Master state. Which of the following will not cause this phenomenon?

              Answer: B


              NEW QUESTION # 93
              A network engineer accidentally deleted the IP address of an interface through the command line.
              If he wants to view the deleted IP address, which of the following information should he query?

              Answer: A


              NEW QUESTION # 94
              Which of the following information can the DHCP binding table contain? (Multiple choice)

              Answer: A,B,C


              NEW QUESTION # 95
              ......

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