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Huawei H12-821_V1.0 Exam Overview:

Certification Vendor:	Huawei
Exam Name:	HCIP-Datacom-Core Technology V1.0
Exam Number:	H12-821_V1.0
Real Exam Qty:	60
Exam Duration:	90 minutes
Certificate Validity Period:	3 years
Exam Format:	Fill-in-the-blank, Drag-and-drop, True/false, Single-choice, Multiple-choice
Available Languages:	Japanese, Chinese, English
Related Certifications:	HCIP-Datacom-Advanced Routing & Switching Technology V1.0 HCIA-Datacom
Passing Score:	600/1000
Exam Price:	300 USD
Recommended Training:	Huawei Official HCIP-Datacom Training
Exam Registration:	Pearson VUE Registration
Sample Questions:	Huawei H12-821_V1.0 Sample Questions
Exam Way:	Online proctored or onsite testing at Pearson VUE centers
Pre Condition:	Recommended to have HCIA-Datacom certification or equivalent knowledge and 1–2 years of network engineering experience
Official Syllabus URL:	https://e.huawei.com/en/talent/certification/exam/h12-821_v1.0

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q224-Q229):

NEW QUESTION # 224
Please sequence the process of allocating VLANs to terminals from the VLAN Pool.

A. Assign VLAN to the terminal according to the JiangAN algorithm
B. Determine the VLAN Poo1 bound to the VAP and the VLAN algorithm
C. Terminal access to VAP
D. The terminal accesses from the divided VLAN

Answer: A,B,C,D

NEW QUESTION # 225
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. 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.
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. To quickly learn about the network status and performance requirements, you can set the interval for sending BFD packets to the minimum value.

Answer: D

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.
Reference:
Huawei HCIA-Datacom Study Guide, Chapter "BFD Configuration and Optimization."

NEW QUESTION # 226
The FIB table is located on the data plane of the router, and each forwarding table entry specifies information such as the outgoing interface and the next-hop IP address to reach a certain destination.
Which of the following meanings does the B field in FLAG represent?

A. Black hole routing
B. Available routes
C. Static routing
D. Gateway routing

Answer: A

NEW QUESTION # 227
Which of the following is used as the destination port for single-hop BFD?

A. TCP port 3784
B. UDP port 4784
C. UDP port 3784
D. TCP port 4784

Answer: C

Explanation:
Single-Hop BFD:
Single-hop BFD is used for detecting link failures in directly connected devices.
It uses UDP port 3784 for communication.
Multi-Hop BFD:
For multi-hop scenarios, BFD uses UDP port 4784 to ensure end-to-end connectivity.

NEW QUESTION # 228
The following is the BGP information output by the router.

Which of the description of this information is wrong?

A. The Router ID of the router is 1.1.1.9
B. The router has introduced the network segment of 4.4.4.0/24 through the import-route command
C. Use the display bgp network command to display the routing information of BGP advertised through the BGP network
D. The AS number of the router is 10

Answer: B

NEW QUESTION # 229
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