H12-891_V1.0 Guide | H12-891_V1.0 Best Preparation Materials

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Huawei H12-891_V1.0 (HCIE-Datacom V1.0) Certification Exam is an advanced level certification program that validates the knowledge and skills of professionals in the field of data communication. HCIE-Datacom V1.0 certification is designed to test the expertise of candidates in designing, implementing, and troubleshooting complex data communication networks. The HCIE-Datacom V1.0 certification is highly regarded in the industry and is recognized globally, making it a valuable asset for professionals looking to advance their career in the field of data communication.

Huawei Technologies Co. Ltd. is a leading global provider of information and communication technology (ICT) infrastructure and smart devices. The company has been offering various certification programs that cater to different levels of expertise in the ICT industry. One of their certification exams is the Huawei Certified Internetwork Expert-Datacom (HCIE-Datacom) V1.0, also known as the H12-891_V1.0 Certification Exam.

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Huawei HCIE-Datacom V1.0 Sample Questions (Q225-Q230):

NEW QUESTION # 225
Regarding BGP4+, the following statement is correct?

Answer: A,D


NEW QUESTION # 226
Which of the following statements aboutSR-MPLS Policy path planningare correct?

Answer: A,C,D

Explanation:
Comprehensive and Detailed In-Depth Explanation:
A: When planning paths based on bandwidth:Correct. The available bandwidth of each interface must beset in advanceto allow path planning based on bandwidth requirements.
B: When planning paths based on delay:Correct. To plan paths considering delay, you need to deployTWAMP (Two-Way Active Measurement Protocol)oriFIT (Intelligent Flow Information Telemetry)to measure thereal-time delayon network links.
C: If the controller plans SR-MPLS Policy paths:Incorrect. The controller can planprimary, backup, and load- balanced paths, enablingtraffic distribution across multiple paths.
D: Statically planned SR-MPLS Policy paths:Correct. You canmanually configure load balancingfor the primary path when planning the SR-MPLS Policy path statically.


NEW QUESTION # 227
On an SR-MPLS network, manually configured prefix SIDs on different devices may conflict with each other.
Assume that there are four routes (prefix/mask SID) as follows.Which of the following routes will be selected according to the conflict handling principle?

Answer: C

Explanation:
Comprehensive and Detailed In-Depth Explanation:
In SR-MPLS, ifprefix SIDs conflict, the following principles are applied:
Prefix with a smaller value (numerically lower SID) wins.
If the prefix length is the same, the lower SID value is selected.
In this case:
Both1.1.1.1/32 2 (A)and1.1.1.1/32 1 (B)have the same prefix length.
SinceSID 1is numericallysmallerthanSID 2,B (1.1.1.1/32 1)is selected.
The other routes (C and D) have different prefixes and do not directly conflict.


NEW QUESTION # 228
In the following figure, R1, R2, R3, and R4 all belong to OSPF area 0. The link costs are marked in the figure. The Loopback0 addresses of R1, R2, R3, and R4 are advertised to OSPF. R1, R2, and R3, which are R4 clients, use Loopback0 to establish an iBGP peer relationship with R4. The directly connected network segment 172.20.1.4/32 of R4 is advertised to BGP. Which of the following statements are correct about the direction of traffic from R1 to 172.20.1.4/32?

Answer: A,B

Explanation:
Let's analyze the scenario and each statement carefully based on OSPF path selection and BGP behavior in Huawei routers.
✅ Option A: The preferred path is R1-R3-R4.
According to the OSPF cost values:
R1-R3-R4: Cost = 1 + 1 = 2
R1-R2-R4: Cost = 2 + 2 = 4
OSPF chooses the lowest-cost path to reach a destination. Therefore, R1 will prefer the R1-R3-R4 path to reach 172.20.1.4/32.
Huawei Datacom Reference:
"OSPF selects routes based on the shortest path calculated using link costs. The router always selects the path with the lowest cost." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Path Selection, Chapter 5)
✅ Option B: If the stub router on-startup command is run on R3, packet loss occurs during the power-off process of R3 but no packet loss occurs during the startup process of R3.
When R3 is powered off, OSPF needs to reconverge, which causes temporary packet loss.
When R3 starts up, it will advertise itself as a stub router using the stub-router on-startup command. This tells OSPF not to use R3 as a transit path during the startup period, thus preventing traffic blackholing.
Huawei Datacom Reference:
"stub-router on-startup command prevents a newly started router from being used as a transit node by OSPF, allowing routing to remain stable during convergence." (Source: HCIE-Datacom Study Guide v3.0 - OSPF Stub Router Functionality, Chapter 6.2)
❌ Option C: The preferred path is R1-R2-R4.
This is incorrect because the OSPF path cost via R2 is higher (4) than the cost via R3 (2).
❌ Option D: Packet loss occurs during both the power-off and startup processes of R3.
Incorrect. As explained above, when the stub-router on-startup command is used, packet loss is avoided during startup, but still occurs during power-off since the alternate path requires convergence.


NEW QUESTION # 229
What is the router ID length supported by OSPFv3?

Answer: D

Explanation:
Comprehensive and Detailed In-Depth Explanation:
OSPFv3, which supports IPv6, uses a router ID that is 32 bits in length, similar to OSPFv2. The router ID in OSPF is always a 32-bit number, typically represented in an IPv4 address format (dotted decimal). Although OSPFv3 is designed to support IPv6, itstill relies on a 32-bit router ID for identification, which must be unique within an OSPF domain. The router ID does not change even though the protocol itself supports IPv6 addresses (128 bits).


NEW QUESTION # 230
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