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  1. Home
  2. Huawei Certification
  3. H12-891_V1.0 Exam
  4. Huawei.H12-891_V1.0.v2026-06-05.q295 Dumps
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Question 256

As shown in figure, Clent1, C lent2 and Clent3 are simultaneously clients of RR1. Ri introduces 10 routes. It is assumed that the RGP is configured correctly. The neighbor relationship has been established, how many route entries exist in the BGP routing table of the most clIient3?

Correct Answer: C
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Question 257

Refer to the following command output on the router R1. Which of the following statements is incorrect?
<R1> display interface Tunnel
Tunnel0/0/0 current state : UP
Line protocol current state : UP
Last line protocol up time : 15:21:23 UTC-08:00
Description: ! 0.0.3.3
Route Port, The Maximum Transmit Unit is 1500
Internet Address is 20.1.1.1/24
Encapsulation is TUNNEL, loopback not set
Tunnel source 10.0.1.1 (LoopBack0), destination 10.0.3.3
Tunnel protocol/transport GRE/IP, key disabled
keepalive disabled
Checksumming of packets disabled
Current system time: 15:21:37-08:00
300 seconds input rate 0 bits/sec, 0 packets/sec
300 seconds output rate 0 bits/sec, 0 packets/sec
13 seconds input rate 0 bits/sec, 0 packets/sec
13 seconds output rate 448 bits/sec, 0 packets/sec
9 packets output, 824 bytes
0 output error
Input bandwidth utilization : -
Output bandwidth utilization : -

Correct Answer: D
Comprehensive and Detailed In-Depth
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.
Reference:
Huawei HCIE Datacom Official Certification Guide
Huawei GRE Tunnel Configuration Guide
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Question 258

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.

Correct Answer: A
In MPLS LDP (Label Distribution Protocol), label retention modes control how labels are stored in the Label Forwarding Information Base (LFIB).
DU Label Advertisement Mode (Downstream Unsolicited):
* Labels are advertised to all LDP peers without a request.
* The receiving router decides which label to use for forwarding.
Liberal vs. Conservative Label Retention:
# Liberal Label Retention Mode (Correct Answer)
* All received labels from all LDP peers are stored.
* Even if a peer is not the optimal next hop, its label is retained.
* Allows faster convergence during 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
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Question 259

For telemetry data push, data can be transferred between devices and collectors using the TLS protocol. TLS must be configured for data encryption if data is pushed based on gRPC.

Correct Answer: A
Huawei telemetry supports multiple transport protocols such as gRPC, HTTP2, and Kafka. When using gRPC, it is typically paired with TLS for secure encrypted transmission. TLS ensures that telemetry data is not intercepted or modified during transport.
Exact Extract - Huawei HCIE-Datacom Guide - Telemetry Security Section:
"When using gRPC for telemetry data push, TLS must be configured to encrypt the transport channel between devices and collectors." Reference:
Huawei iMaster NCE Telemetry Deployment Guide
HCIE-Datacom Study Guide - gRPC and Secure Transport Layer for Telemetry
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Question 260

BGP4+ is running between two routers, and the neighbor relationship is normal, but the BGP routing table of the router on this side does not have a neighbor route entry.

Correct Answer: B,C,E
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