Huawei H12-891_V1.0 Exam With Confidence Using Practice Dumps

The basic constructs in YANG data modeling include:

Leaf node – A single data element with a specific type (e.g., integer, string).

List node – A repeating set of elements, each structured the same.

Incorrect options:

A. Set node – ❌ Not a valid YANG construct.

D. Tree node – ❌ Not an individual data model element. The entire model forms a tree structure, but there is no “tree node” in YANG syntax.

Exact Extract – Huawei YANG Modeling Fundamentals:

“YANG defines elements such as leaf, list, container, choice, and leaf-list. ' Set ' and ' tree ' are not YANG node types.”

Virtual Networks in Huawei CloudCampus Solution:

Virtual networks (VNs) are segmented based on services (e.g., IoT, Guest Wi-Fi, Enterprise Wi-Fi).

Each VN has its own routing and forwarding instance (VRF).

Isolation Between Virtual Networks:

By default, different virtual networks are isolated.

If inter-VN communication is required, it must be manually configured using policy-based routing (PBR), inter-VRF routing, or firewall policies.

Reference from Huawei HCIE-Datacom Documentation:

Huawei CloudCampus Solution Guide – Virtual Networks and Segmentation

HCIE-Datacom Training Material – Policy-Based Inter-VN Communication

To automatically enable MPLS on an interface in SR-MPLS:

Segment routing must be enabled globally in the system view → ✅

Segment routing must also be enabled under the IGP process, and IGP (OSPF or IS-IS) must be enabled on the interface → ✅

Clarifications:

SRGB (Segment Routing Global Block) configuration defines SID ranges but does not trigger MPLS enablement → ❌

Static adjacency labels are advanced options and do not auto-enable MPLS → ❌

Correct answers: B, D