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No doubt the Huawei H12-821_V1.0 certification is a valuable credential that offers countless advantages to H12-821_V1.0 exam holders. Beginners and experienced professionals can validate their skills and knowledge level with the HCIP-Datacom-Core Technology V1.0 H12-821_V1.0 Exam and earn solid proof of their proven skills.

Huawei H12-821_V1.0 (HCIP-Datacom-Core Technology V1.0) certification exam is designed to test the knowledge and skills of IT professionals in the field of data communication. It is an advanced-level certification exam that is focused on core technologies that are essential for building and managing data communication networks. Candidates who Pass H12-821_V1.0 Exam will be able to demonstrate their expertise in areas such as network architecture, protocol analysis, network security, and QoS (Quality of Service) management.

Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q252-Q257):

NEW QUESTION # 252
If a new member joins a multicast group in PIM-DM, which of the following descriptions are correct? (Multiple choice)

A. In PIM-DM mode, after using the "diffusion-pruning" method to establish a multicast distribution tree, the status refresh mechanism prevents the downlink interface from automatically recovering once it is suppressed.
B. In existing networks, the method of waiting for the multicast routing table to time out and then flooding the entire network again is often used to help new users receive multicast information.
C. You can use the grafting mechanism to proactively establish a multicast distribution path in reverse direction to help new users receive multicast information.
D. The multicast network needs to update the multicast distribution tree before it can send multicast data to group members.

Answer: C,D

NEW QUESTION # 253
The attacker sends an ICMP response request and sets the destination address of the request packet as the broadcast address of the victim network to achieve the attack purpose. So, which of the following attacks does this behavior belong to?

A. SYN flood attack
B. Smurf attack
C. ICMP redirection attack
D. IP spoofing attack

Answer: B

NEW QUESTION # 254
On a WLAN, the HSB service sets up an HSB channel between two devices that back up each other, maintains the channel status, and backs up data. Which of the following can HSB back up in real time?

A. DHCP address information
B. AP entries
C. CAPWAP tunnel information
D. User data information

Answer: B,C,D

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
* HSB (Hot Standby Backup) Service:
* HSB is used on WLAN controllers to back up critical information in real time to a backup device, ensuring service continuity in case of failures.
* Backed-Up Information:
* CAPWAP Tunnel Information (A): Essential for maintaining connections between APs and controllers.
* AP Entries (C): Information about connected APs is backed up.
* User Data Information (D): Includes client authentication and session details.
* Incorrect Option:
* DHCP Address Information (B): Not part of HSB's responsibilities, as DHCP is handled separately.
References:
* HCIA-Datacom Study Guide, Chapter: WLAN Redundancy with HSB
* Huawei HSB Configuration Guide

NEW QUESTION # 255
A typical NetStream system consists of two parts: the network stream data exporter NDE and the network stream data collector NSC.

A. TRUE
B. FALSE

Answer: B

NEW QUESTION # 256
On an office network of an enterprise, OSPF is enabled on two directly connected routers. During adjacency establishment, the state machine stays in the 2-way state. Which of the following statements are not possible causes?

A. Hello time values are different.
B. Router IDs conflict.
C. Area IDs are different.
D. The N-bit and E-bit of Hello packets are the same.

Answer: B,D

Explanation:
Comprehensive and Detailed Step-by-Step Explanation:
OSPF State Machine:
OSPF adjacency progresses through several states:Down > Init > 2-Way > ExStart > Exchange > Loading > Full.
The2-Way stateindicates that routers have exchanged Hello packets but are not forming full adjacencies.
Possible Causes for Staying in the 2-Way State:
Hello Time Values Are Different (A):Mismatched Hello/Dead intervals prevent adjacency establishment.
Area IDs Are Different (B):OSPF routers must belong to the same area to establish adjacency.
Router IDs Conflict (C):While Router ID conflicts cause other issues, they do not result in the 2-Way state.
N-bit and E-bit Are the Same (D):Matching N-bit/E-bit values are normal and do not cause problems.
References:
HCIA-Datacom Study Guide, Chapter: OSPF Adjacency Establishment
Huawei OSPF Neighbor State Analysis

NEW QUESTION # 257
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