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Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) Certification Exam is an advanced level certification designed for professionals who want to enhance their skills and knowledge in data communication technology. HCIP-Datacom-Core Technology V1.0 certification is designed by Huawei Technologies Co. Ltd, a leading global provider of information and communications technology (ICT) infrastructure and smart devices. HCIP-Datacom-Core Technology V1.0 certification exam focuses on the core technologies used in data communication and aims to equip professionals with the skills needed to design, deploy and maintain data communication networks.

Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q50-Q55):

NEW QUESTION # 50
When deploying BFD, you need to adjust some parameters so that it can better detect the network status.
Which of the following statements is false about BFD optimization?

A. To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.
B. After a high priority is configured for BFD packets, BFD packets are preferentially forwarded.
C. On a live network, some devices switch traffic only when a BFD session changes to the Up state. If a routing protocol goes Up later than an interface, no route is available for switching traffic back, leading to traffic loss. To resolve this issue, configure a delay to compensate for the time difference caused when the routing protocol goes Up later than the interface.
D. If a BFD session flaps, master/backup switchovers are frequently performed on the application associated with the BFD session. To prevent this, set the WTR time of the BFD session.

Answer: A

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
1. Overview of BFD Optimization:
* BFD (Bidirectional Forwarding Detection) is a protocol that provides rapid detection of link failures.
* Optimizing BFD involves adjusting parameters to balance between detection speed and network stability.
2. Analysis of Each Statement:
Option A: After a high priority is configured for BFD packets, BFD packets are preferentially forwarded.
* Correct (True Statement).
* High priority ensures that BFD packets are not delayed or dropped under congestion, improving detection accuracy.
Option B: To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.
* Incorrect (False Statement).
* Setting the interval to the minimum value can lead to excessive BFD session flapping, which may overload the network or cause instability. The interval should be configured based on network requirements and conditions, rather than set to the minimum.
Option C: On a live network, some devices switch traffic only when a BFD session changes to the Up state... configure a delay to compensate for the time difference.
* Correct (True Statement).
* This is a valid optimization to avoid issues caused by timing mismatches between BFD and routing protocols.
Option D: If a BFD session flaps, master/backup switchovers are frequently performed... set the WTR time.
* Correct (True Statement).
* The WTR (Wait to Restore) timer helps stabilize BFD by delaying session recovery after a flap, reducing the risk of frequent switchovers.
3. Summary:
* The false statement is B, as setting the BFD packet interval to the minimum can destabilize the network.

NEW QUESTION # 51
Preferences of routing protocols determine the sequence In which a router selects a route among routes to the same destination /earned through different routing protocols.

A. FALSE
B. TRUE

Answer: B

Explanation:
The preference of routing protocols determines the selection order of routes when a router receives multiple routes to the same destination from different routing protocols. For instance, OSPF has a higher preference over RIP, so OSPF routes will be selected first. Huawei routing preferences confirm this behavior .

NEW QUESTION # 52
On the OSPF network shown in the figure, an adjacency has been established between R1 and R2. An engineer configures the commands in the figure on R2. In this case, which of the following routing entries may exist in the routing table of R2?

A. 10.1.4.0/24
B. 10.1.2.0/24
C. 10.1.1.0/24
D. 10.1.3.0/24

Answer: A,B,D

Explanation:
Configuration Analysis:
* On R2, the following configuration has been applied:
acl 200
rule deny source 10.1.0.0 0.0.3.0
rule permit
#
ospf 1
filter-policy 2000 import
* This configuration uses ACL 200 to filter routes during import into the OSPF routing table on R2.
* Rule deny source 10.1.0.0 0.0.3.0: Blocks routes in the range 10.1.0.0/24 to 10.1.3.0/24 (inclusive).
* Rule permit: Allows all other routes to be imported.
* Impact of ACL 200 on Route Import:
* 10.1.0.0/24 to 10.1.3.0/24: These subnets are explicitly denied by ACL 200 and will not appear in R2's routing table.
* 10.1.4.0/24 and beyond: These subnets are permitted by the rule permit statement and will be imported into R2's routing table.
* Routing Table Entries on R2:
* Option A (10.1.4.0/24): Exists in R2's routing table because it is permitted.
* Option B (10.1.3.0/24): Does not exist because it is denied by ACL 200.
* Option C (10.1.2.0/24): Does not exist because it is denied by ACL 200.
* Option D (10.1.1.0/24): Does not exist because it is denied by ACL 200.
* A (10.1.4.0/24)
Correct Options:References:
* HCIA-Datacom Study Guide, Chapter: OSPF Route Filtering
* Huawei ACL Configuration for Route Policies

NEW QUESTION # 53
Which of the following scenarios is not suitable for deploying interface PBR?

A. On an enterprise network with multiple ISP outbound interfaces, each internal network segment accesses the Internet through a particular ISP outbound interface.
B. A core switch needs to forward the traffic between the intranet and extranet to a security detection device that connects to the core switch in off-path mode.
C. A device needs to modify the next-hop IP address for locally originated traffic.
D. A core switch needs to forward traffic between the intranet and extranet to an AC device that connects to the core switch in off-path mode.

Answer: C

Explanation:
Policy-Based Routing (PBR) on interfaces is used to forward traffic based on specific policies rather than the routing table. However, PBR is not suitable for modifying the next-hop of locally originated traffic. Other scenarios listed are typical use cases for interface PBR .

NEW QUESTION # 54
On an OSPF network, interfaces are classified into four types based on link layer protocols. Which of the following types can interfaces on an IS-IS network be classified into based on physical links?

A. Broadcast
B. P2P
C. NBMA
D. P2MP

Answer: A,B

Explanation:
IS-IS Interface Types
* IS-IS interfaces are categorized based on physical link characteristics:
* Point-to-Point (P2P): Direct connections between two routers.
* Broadcast: Shared medium networks where multiple routers communicate.
Incorrect Options
* C. P2MP and D. NBMA are not standard interface classifications in IS-IS.
HCIP-Datacom-Core Reference
* IS-IS physical link classifications are elaborated in IS-IS link configuration sections.

NEW QUESTION # 55
......

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