Latest New Huawei H12-891_V1.0 Dumps - Right Preparation Method [2026]

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Huawei HCIE-Datacom V1.0 Sample Questions (Q168-Q173):

NEW QUESTION # 168
Which of the following commands is used to adjust the cost of an IS-IS interface?

Answer: D

Explanation:
In Intermediate System to Intermediate System (IS-IS), the cost (metric) determines the preferred routing path. The cost is assigned to each interface, and IS-IS uses the shortest path (lowest cost) to reach a destination.
The correct command to manually modify the IS-IS interface cost is:
kotlin
CopyEdit
interface GigabitEthernet 0/0/1
isis enable 1
isis cost <value>
Where <value> represents the manually configured cost of the interface.
Incorrect Options:
* A. isis circuit-type - Used to define the circuit type (Level-1, Level-2, or both), but does not affect cost. #
* B. isis timer hello - Modifies the hello interval for IS-IS neighbors but does not change cost. #
* C. isis circuit-level - Not a valid IS-IS configuration command. #
Reference from Huawei HCIE-Datacom Documentation:
* HCIE-Datacom Certification Guide - IS-IS Protocol Configuration
* Huawei Command Reference for IS-IS
* Huawei Routing & Switching Training Manual - IS-IS Cost Metric Adjustment


NEW QUESTION # 169
HTTP is an application layer protocol for distributed, collaborative, and hypermedia information systems.

Answer: A

Explanation:
# Hypertext Transfer Protocol (HTTP) is an application-layer protocol used for:
* Accessing web pages and hypermedia content.
* Client-server communication over the internet.
* Stateless communication with request-response architecture.
Key Features of HTTP:
* Application Layer Protocol in the TCP/IP model.
* Uses TCP (Port 80) and HTTPS (Port 443) for secure communication.
* Supports REST APIs, web applications, and cloud services.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei Network Protocol Guide - HTTP and Web Services
* HCIE-Datacom Study Material - Application Layer Protocols in TCP/IP Model


NEW QUESTION # 170
Which of the following statements are correct about the command:
ping -aX -cY -sZ -vpn-instance M 10.5.16.2

Answer: A,B,C,D

Explanation:
Understanding the Command Components:
This is a Huawei CLI command used for diagnosing connectivity within a VPN instance in an MPLS network.
* ping -aX # Specifies the source IP address (X) of the ping packets.
* -cY # Specifies the number of ICMP Echo Request packets to send (Y).
* -sZ # Defines the size (in bytes) of each ICMP Echo Request packet (Z).
* -vpn-instance M # Specifies the VPN instance (VRF) M to which the ping packets belong.
Why are all options correct?
# A. The source IP address of the ping packets is X.
* The -aX option forces the ping to originate from IP X instead of the default interface IP.
# B. The ping packets belong to VPN instance M.
* The -vpn-instance M option ensures the ping is sent within VPN instance M, allowing verification of MPLS L3VPN routing.
# C. During the ping operation, the quantity of ICMP Request packets is Y.
* The -cY parameter sets the number of ICMP Echo Requests to be sent, making Y the total count.
# D. The size of each ICMP Request packet for the ping operation is Z bytes.
* The -sZ parameter defines packet size, helping to test MTU (Maximum Transmission Unit) issues.
Real-World Application:
* Verifying MPLS VPN connectivity: Ensure customer networks are reachable within separate VRFs.
* Testing MTU & fragmentation: Using -sZ, operators can check if packet fragmentation occurs.
* Debugging asymmetric routing issues: By forcing -aX, engineers can trace return paths.
# Reference: Huawei HCIE-Datacom Official Guide - MPLS VPN Troubleshooting & Ping Options


NEW QUESTION # 171
As shown in the following figure, a part of the LSDB LSDB of a router LSDB is shown in the first one in the following figure. A new LSP has been received, the second one in the figure below, and the following statement is incorrect (single choice).

Answer: C


NEW QUESTION # 172
On traditional campus networks, network admission control (NAC), VLAN, and ACL technologies are used to control users ' network access rights. This results in heavy network O & M workload. Which of the following improvements does the free mobility solution of iMaster NCE-Campus make to traditional campus networks in terms of policy management and control?

Answer: B,C,D

Explanation:
The free mobility solution in Huawei iMaster NCE-Campus allows:
Centralized policy management via the controller
Security group-based policies, decoupled from IPs/VLANs
Automatic policy delivery, no need to configure repeatedly per device
Dynamic mapping of users and IPs via security group subscriptions
Exact Extract - Huawei iMaster NCE-Campus Solution White Paper:
"Free mobility uses security groups and centralized control to enable consistent policy enforcement, avoiding repetitive configurations and simplifying policy management." Reference:
Huawei HCIE-Datacom Study Guide - Campus Free Mobility
iMaster NCE-Campus Product Description & Deployment Guide


NEW QUESTION # 173
......

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