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Huawei H12-891_V1.0 Exam Syllabus Topics:

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

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                                  Huawei HCIE-Datacom V1.0 Sample Questions (Q170-Q175):

                                  NEW QUESTION # 170
                                  When an SSH client logs in to an SSH server that is configured only with username and password authentication in SSH mode, the key exchange phase is not involved (no key is generated).

                                  Answer: A

                                  Explanation:
                                  Understanding SSH Authentication and Key Exchange
                                  🔹 What Happens When an SSH Client Connects to a Server?
                                  1️⃣ Key Exchange Phase (KEX)
                                  Even if only password authentication is used, SSH still performs key exchange.
                                  The server and client negotiate encryption keys using algorithms like Diffie-Hellman (DH).
                                  2️⃣ User Authentication Phase
                                  After encryption keys are exchanged, the user authenticates using a username and password.
                                  Why is the Answer FALSE?
                                  ❌ Even with password authentication, SSH still performs key exchange to establish an encrypted session.
                                  ✅ The SSH session is always encrypted using cryptographic keys generated during KEX.
                                  Real-World Application:
                                  Secure Remote Access: Protects login credentials from MITM (Man-in-the-Middle) attacks.
                                  Cloud & Datacenter Networks: Ensures secure SSH connections across remote infrastructure.
                                  ✅ Reference: Huawei HCIE-Datacom Guide - SSH Key Exchange and Authentication


                                  NEW QUESTION # 171
                                  The multicast protocol that can generate multicast distribution trees is ?

                                  Answer: B


                                  NEW QUESTION # 172
                                  As shown in the topology diagram, all interfaces of the router in the figure are enabled with the ISIS protocol, and the following statement is correct.

                                  Answer: A,C,D


                                  NEW QUESTION # 173
                                  On an SR-MPLS network, manually configured prefix SIDs on different devices may conflict with each other.
                                  Assume that there are four routes (prefix/mask SID) as follows.Which of the following routes will be selected according to the conflict handling principle?

                                  Answer: B

                                  Explanation:
                                  Comprehensive and Detailed In-Depth Explanation:
                                  In SR-MPLS, ifprefix SIDs conflict, the following principles are applied:
                                  Prefix with a smaller value (numerically lower SID) wins.
                                  If the prefix length is the same, the lower SID value is selected.
                                  In this case:
                                  Both1.1.1.1/32 2 (A)and1.1.1.1/32 1 (B)have the same prefix length.
                                  SinceSID 1is numericallysmallerthanSID 2,B (1.1.1.1/32 1)is selected.
                                  The other routes (C and D) have different prefixes and do not directly conflict.


                                  NEW QUESTION # 174
                                  The following statement about the OSPFv3 message format is correct?( Multiple select).

                                  Answer: A,C,D


                                  NEW QUESTION # 175
                                  ......

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