HCSP-Presales-Data Center Network Planning and Design V1.0 H19-402_V1.0 Exam Questions with Experts Answers Updated Recently

Comprehensive and Detailed 150 to 200 words of Explanation From Huawei data center:

After rechecking against Huawei’s own materials, the verified multi-select answer is B and D . Huawei documentation for Elastic Load Balance, which is the load-balancing architecture referenced in Huawei cloud/data center designs, states that for Layer 4 traffic using TCP/UDP , incoming traffic is routed only through the LVS cluster . For Layer 7 traffic using HTTP/HTTPS , incoming traffic is routed first to the LVS cluster and then to the Nginx cluster before reaching backend servers. That means Huawei explicitly uses LVS for L4 load balancing and Nginx together with LVS for L7 load balancing.

By contrast, IP ECMP is a Layer 3 equal-cost forwarding/load-sharing mechanism, not an L4-L7 service load balancer in Huawei’s CloudFabric context. Huawei’s ECMP documentation discusses route-based traffic distribution in the IP layer, which is fundamentally different from application/service load balancing.

In Huawei VXLAN architecture, all listed statements accurately reflect core design concepts used in CloudFabric deployments.

A is correct: a Virtual Interface (VBDIF/VirtualIF) is a Layer 3 interface associated with a Bridge Domain (BD) , enabling inter-subnet routing (distributed gateway function).

B is correct: Huawei VXLAN commonly uses a 1:1 mapping between VNI and BD , where the BD acts as the Layer 2 forwarding domain. This mapping ensures clear separation of tenant networks and simplifies forwarding logic.

C is correct: VXLAN encapsulation uses VTEP (VXLAN Tunnel Endpoint) IP addresses . The source IP is the local VTEP, and the destination IP is the remote VTEP. Together, they logically represent the VXLAN tunnel used for transporting overlay traffic across the IP underlay.

D is also correct: a VAP (Virtual Access Point) represents the service access interface. On Huawei CE switches, VAPs are typically implemented using VLAN-based access , meaning VLANs act as the entry point for VXLAN services.

These concepts are fundamental in Huawei EVPN-VXLAN fabrics, enabling scalable, multi-tenant, and automated data center networking.