H12-891_V1.0 Exam Results

Comprehensive and Detailed In-Depth Explanation:

The telemetry protocol stack is structured as follows:

Communication layer (A): Manages data transmission between the telemetry client (device) and the server.

Transport layer (B): Uses protocols such as gRPC, HTTP/2, or TCP to transmit telemetry data.

Data encoding layer (C): Encodes data using formats like JSON, Protobuf, or XML.

The Data analysis layer (D) is not part of the telemetry protocol stack itself.

Data analysis typically occurs after the data has been collected and received on the server or collector.

Telemetry focuses on data collection, encoding, transport, and transmission, not on analysis.

Therefore, the correct answer is D.

Comprehensive and Detailed In-Depth Explanation:

During a network migration test, it is crucial not only to verify that the network itself is functioning correctly but also to ensure that upper-layer application services are running properly on the newly migrated network. Migration testing aims to confirm that the transition has not disrupted service functionality.

Option A and C focus solely on network performance, which is necessary but insufficient.

Option B refers to command outputs, which are technical checks and do not guarantee service continuity.

Option D correctly identifies that successful migration is indicated by proper operation of upper-layer application services, as the primary purpose of a network is to support these applications.

Option B is incorrect because it falsely states that EBGP cannot be configured on Spoke-PE or Spoke-CE if the Hub-CE and Hub-PE run IGP. In reality, EBGP can still be used between Spoke sites and PE devices, regardless of the protocol between the Hub PE and CE. EBGP is often used for PE-CE communication, including in Hub-and-Spoke architectures.

Exact Extract - Huawei HCIE-Datacom VPN Section:

“In Hub & Spoke deployments, EBGP can be deployed between Spoke-CE and Spoke-PE. The choice of routing protocol between Hub-CE and Hub-PE does not limit this.”

Comprehensive and Detailed In-Depth Explanation:

Analyzing the output:

A. Key authentication is disabled for the tunnel: Correct. The output explicitly states " key disabled " .

B. The destination IP address of the tunnel is 10.0.3.3: Correct. The output shows " destination 10.0.3.3 " .

C. The tunnel is a GRE tunnel: Correct. The output states " Tunnel protocol/transport GRE/IP " .

D. Keepalive detection is enabled on the tunnel: Incorrect. The output clearly shows " keepalive disabled " .

Therefore, the correct answer is D because the tunnel does not have keepalive enabled.