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Huawei H12-891_V1.0 Exam Syllabus Topics:

SectionObjectives
Topic 1: IPv6 and Advanced IP Technologies- IPv6 deployment
  • 1. IPv6 addressing and transition
    Topic 2: Routing and Switching Technologies- IP routing protocols
    • 1. IS-IS basics
      • 2. OSPF
        • 3. BGP
          - Switching technologies
          • 1. VLAN and STP
            • 2. Ethernet switching mechanisms
              Topic 3: Data Center and Virtualization Technologies- VXLAN and overlay networks
              • 1. Data center network virtualization
                Topic 4: Enterprise Network Architecture- Network design principles
                • 1. Scalability and high availability design
                  • 2. Hierarchical network architecture
                    Topic 5: Network Automation and Programmability- SDN and automation
                    • 1. NETCONF/YANG basics
                      • 2. Network automation tools
                        Topic 6: WAN and VPN Technologies- MPLS fundamentals
                        • 1. VPN technologies
                          • 2. MPLS LDP and forwarding
                            Topic 7: Network Security and QoS- QoS mechanisms
                            • 1. Traffic classification and shaping
                              - Security mechanisms
                              • 1. Basic network security design
                                • 2. ACL and traffic control

                                  >> H12-891_V1.0試題 <<

                                  H12-891_V1.0題庫最新資訊，H12-891_V1.0指南

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                                  最新的 Huawei Certified ICT Expert H12-891_V1.0 免費考試真題 (Q173-Q178):

                                  問題 #173
                                  In DU label advertisement mode, if the liberal label retention mode is used, the device reserves labels received from all the LDP peers regardless of whether the LDP peer is the optimal next hop for reaching the destination network.

                                  答案：B

                                  解題說明：
                                  InMPLS LDP (Label Distribution Protocol), label retention modes control how labels are stored in theLabel Forwarding Information Base (LFIB).
                                  DU Label Advertisement Mode (Downstream Unsolicited):
                                  Labels areadvertised to all LDP peers without a request.
                                  The receiving routerdecides which label to usefor forwarding.
                                  Liberal vs. Conservative Label Retention:
                                  #Liberal Label Retention Mode (Correct Answer)
                                  All received labels from all LDP peers are stored.
                                  Even if apeer is not the optimal next hop, its label is retained.
                                  Allowsfaster convergenceduring failures.
                                  #Conservative Label Retention Mode
                                  Only the label from the best next-hop peer is stored.
                                  Reduces memory usage but can slow down convergence in case of failure.
                                  Reference from Huawei HCIE-Datacom Documentation:
                                  Huawei MPLS LDP Configuration Guide - Liberal vs. Conservative Label Retention HCIE-Datacom Training Material - Label Advertisement in MPLS Networks


                                  問題 #174
                                  There is an existing switch running the RSTP protocol. If the network topology changes, what happens to the Layer 2 forwarding table that is automatically learned by the switch?

                                  答案：E


                                  問題 #175
                                  On a campus network, which of the following problems may occur when you manually create a static VXLAN tunnel?

                                  答案：B,C,D

                                  解題說明：
                                  Challenges of Static VXLAN Tunnel Configuration
                                  A static VXLAN tunnel requires manual VTEP-to-VTEP configuration, making it complex to maintain.
                                  ✅ A. Heavy configuration workload in a distributed gateway scenario
                                  Static VXLAN requires manual configuration of VTEP mappings, making it difficult to scale and adjust when adding new VTEPs.
                                  ✅ B. Remote MAC addresses are learned through data flooding
                                  Unlike BGP EVPN-based VXLAN, which advertises MAC/IP bindings through BGP, static VXLAN relies on flooding for MAC learning, causing excessive traffic.
                                  ✅ D. N(N-1)/2 tunnels are required for full mesh connectivity
                                  If N devices need to communicate, each must be manually configured with N(N-1)/2 VXLAN tunnels, leading to high administrative overhead.
                                  Incorrect Statement
                                  ❌ C. Static VXLAN tunnels use protocols on the control plane, consuming device resources.
                                  Wrong! Static VXLAN does not use a control plane protocol like BGP EVPN.
                                  Instead, it relies entirely on static mappings, reducing control plane usage.
                                  Reference from Huawei HCIE-Datacom Documentation:
                                  Huawei VXLAN Configuration Guide - Static vs. Dynamic VXLAN Tunnel Establishment HCIE-Datacom Training Material - Manual Configuration Challenges in Static VXLAN


                                  問題 #176
                                  Which of the following statements is incorrect about MP-BGP?

                                  答案：C

                                  解題說明：
                                  MP-BGP is an extension of BGP-4 that supports multi-protocol address families such as IPv6, VPNv4, etc.
                                  When PE and CE exchange BGP routes, there is no need to create a BGP process per VPN on the CE. The CE typically runs a standard BGP process, while the PE maintains separate VPN routing tables (VRFs).
                                  Exact Extract - Huawei HCIE-Datacom MP-BGP Chapter:
                                  "CE devices use standard BGP, and multiple VPNs can share the same BGP process on the CE. The PE handles VPN route separation through VRFs and MP-BGP." Reference:
                                  Huawei HCIE-Datacom Guide - MPLS VPN and MP-BGP
                                  Huawei Datacom Training - MP-BGP and VPN Route Management


                                  問題 #177
                                  This figure shows anSRv6 (Segment Routing over IPv6)packet. If theDestination Addressfield in the IPv6 basic header isFC04::4, the value of theSL (Segment Left)field in the SRv6 header should be____.(Enter only digits.)

                                  答案：

                                  解題說明：
                                  1
                                  Explanation:
                                  Comprehensive and Detailed In-Depth Explanation:1. Understanding SRv6 (Segment Routing over IPv6):
                                  SRv6 uses theIPv6 headeralong with an additionalSRH (Segment Routing Header)to implement segment routing within an IPv6 network. The SRH contains:Segment List (SL):A list of IPv6 addresses (segments) to traverse.SL (Segments Left):An integer that indicates thenumber of segmentsyet to be visited.Active Segment:
                                  Thenext IPv6 addressin the segment list, stored in theDestination Addressfield of the IPv6 header.2.
                                  Analyzing the Given Scenario:Thesegment list (SL)in the SRH header shows:FC04::400FC04::4FC03::3The segment list is processed inreverse order(from bottom to top).SL (Segments Left)indicates theindex of the active segmentin the list.TheDestination Addressin the IPv6 header is currentlyFC04::4, indicating that theactive segmentis thesecond elementin the list.3. Determining the Value of SL:Theindexingin the segment list starts from0.SinceFC04::4is thesecond segment (from the bottom), the value ofSLwill be1.This means that1 segment is leftto be processed after the current one (FC04::4).Once the packet reachesFC04::4, theSL value will decrement to 0, and the next segment (FC03::3) will be processed.4. Why the Answer is 1:TheSL value decreases as segments are processed.As the currentactive segmentis thesecond in the list (from the bottom), theSL value is 1.
                                  References:
                                  Huawei HCIE-Datacom V1.0 Training Materials
                                  Huawei Official Documentation: SRv6 Configuration Guide
                                  RFC 8754 - IPv6 Segment Routing Header (SRH)
                                  HCIE-Datacom Knowledge Base: Segment Routing over IPv6 (SRv6)


                                  問題 #178
                                  ......

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