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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom V1.0 |
| Exam Number: | H12-891_V1.0 |
| Available Languages: | CHS, ENU |
| Exam Duration: | 90 minutes |
| Related Certifications: | HCIE-Datacom Huawei Certified ICT Expert (HCIE) |
| Exam Format: | Short Response Item, Single-answer Question, Multiple-answer Question, True or false, Drag and drop item |
| Passing Score: | 600/1000 |
| Exam Price: | 300 USD |
| Sample Questions: | Huawei H12-891_V1.0 Sample Questions |
| Exam Way: | Pearson VUE or Prometric |
| Pre Condition: | It is recommended to pass HCIP-Datacom-Core Technology. 5 years of relevant work experience is suggested. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/cert/#/cert/technical-cert-details?certId=1223102600645939200&contentId=1223107831750217728 |
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NEW QUESTION # 112
IS-IS supports multi-instance and multi-process. Which of the following statements are correct about IS-IS multi-instance and multi-process?
Answer: A,D
Explanation:
IS-IS Multi-Process:
Huawei devices support runningmultiple IS-IS processes simultaneously.
These processes arecompletely independentof one another: different LSDBs, interfaces, routing tables, etc.
Each process can be associated with aseparate VPN instance, and asingle VPN instance can be served by multiple IS-IS processes.
IS-IS Multi-Instance:
One IS-IS process canrun multiple instances, typically used formulti-VPN scenarios.
However, Huawei ' s current implementation prefersone VPN per processfor clarity and control.
Based on Huawei's design:
Ais incorrect - an IS-IS processcanserve multiple VPNs in other vendors, but Huawei typically uses one process per VPN for clean separation.
Bis correct - a VPN instance can be associated withmultiple IS-IS processes.
Cis incorrect in Huawei implementation context.
Dis correct -IS-IS processes are independent.
Correct answers: B, D
Reference:Huawei HCIE-Datacom V1.0 Study Guide -Chapter: IS-IS Advanced FeaturesSection: Multi- process and VPN Association
NEW QUESTION # 113
The path of an SR-MPLS TE tunnel can be calculated by the controller or tunnel ingress.
Answer: A
Explanation:
Understanding SR-MPLS TE (Segment Routing MPLS Traffic Engineering)
# What is SR-MPLS TE?
* Segment Routing (SR) replaces traditional MPLS LDP/RSVP-TE signaling.
* Uses SR-TE policies to define network paths without requiring per-flow state on intermediate routers.
# How is the SR-MPLS TE Path Calculated?# By the SDN Controller (Centralized Path Computation)
* The controller (e.g., Huawei iMaster NCE) calculates the optimal SR path based on:
* Bandwidth requirements
* Latency constraints
* Traffic policies
* The controller then delivers the SR policy to the ingress router.
# By the Ingress Router (Distributed Path Computation)
* The ingress router computes the SR path dynamically based on local constraints.
* This method is useful when no centralized controller is available.
Why is the Answer TRUE?
# Both centralized (controller-based) and distributed (ingress router-based) path computation are supported in SR-MPLS TE.
Real-World Application:
* 5G and Cloud WANs: Centralized path optimization reduces congestion dynamically.
* Enterprise Networks: Local path computation ensures fast rerouting in case of failures.
# Reference: Huawei HCIE-Datacom Guide - SR-MPLS TE and Path Computation Methods
NEW QUESTION # 114
Which of the following number sequences can be matched by the regular expression 100.s?
Answer: C
Explanation:
Comprehensive and Detailed
The regular expression 100.s follows these rules:
100 matches exactly the sequence 100.
. (dot) represents any single character (digit, letter, or symbol).
s specifically looks for the character s, but it is not included in the given choices.
Now, analyzing each option:
✔ 1000 matches → 1000 (fourth character matches . as a wildcard).
✘ 100 does not match → No extra character after 100.
✘ 10000 does not match → Too many extra characters.
✘ 1001 does not match → s is not present.
Thus, 1000 is the correct answer (C).
📖 Reference: Huawei HCIE Datacom Regex Guide - Regular Expressions in Networking
NEW QUESTION # 115
The following figure shows the inter-AS MPLS L3VPN Option C (Solution 2). ASBR-PE2 is connected to CE3 and runs eBGP.
To enable all CEs to communicate with each other, which of the following address families must peer relationships be enabled in the BGP process of ASBR-PE2?
Answer: A,D
Explanation:
Understanding Inter-AS MPLS L3VPN Option C
#MPLS L3VPN provides Layer 3 VPN services over an MPLS backboneby using BGP to exchange VPN routes.
#Inter-AS MPLS L3VPN Option C (Carrier-to-Carrier Model) works as follows:
ASBRs (Autonomous System Boundary Routers) exchangeVPNv4 routes using MP-BGP.
ASBRsdo NOT store VPN routing tables. Instead, theyadvertise labeled IPv4 routesto enable inter-AS forwarding.
How ASBR-PE2 Enables Inter-AS Communication?
#VPNv4 Address Family (Answer A - Required)
Used to exchangeMPLS VPN routes between PE routers.
MP-BGP (Multiprotocol BGP) exchanges VPNv4 prefixesbetween ASBR-PE1 and ASBR-PE2.
#Unicast BGP Address Family (Answer D - Required)
Required to exchangeIPv4 labeled routesbetween ASBRs.
EnsuresMPLS label forwarding between AS100 and AS200.
#BGP-LS Address Family (Answer B - Not Required)
BGP-LS (BGP Link-State) is used for SDN controllersto learn topology information.
It isnot required for Inter-AS MPLS L3VPN.
#VPN Instance Unicast Address Family (Answer C - Not Required)
This is used forPE-CE communicationbut isnot required between ASBRs.
Why is the Answer A, D?
#VPNv4 routes enable inter-AS VPN communication.
#IPv4 unicast routes are required for ASBR-PE2 to forward packets across AS boundaries.
Real-World Application:
Service Provider Networks:Used incarrier-to-carrier MPLS VPN deployments.
Enterprise WAN Interconnection:Enablesmulti-AS MPLS VPN connectivityfor large enterprises.
#Reference:Huawei HCIE-Datacom Guide - Inter-AS MPLS L3VPN Option C (Carrier-to-Carrier Model)
NEW QUESTION # 116
VPN instances are also known as VPN routing forwarding tables (PN Routing and Forwarding table), and there are multiple route forwarding tables on the PE, including a public route forwarding table, one or more VPN route forwarding tables, and VPNv4 Route forwarding table.
Answer: A
NEW QUESTION # 117
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