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Huawei H12-821_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Multicast	9%	- IGMP and PIM concepts
Topic 2: Network Service and Management	2%	- Network management basics
Topic 3: Routing Fundamentals	3%	- Network basics and routing principles
Topic 4: IPv6	3%	- IPv6 addressing and routing
Topic 5: Network Reliability	8%	- Redundancy and failover mechanisms
Topic 6: Routing and Traffic Control	10%	- Traffic engineering basics - Policy-based routing
Topic 7: Network Solution	2%	- Integrated network design scenarios
Topic 8: Switching Technologies	7%	- VLAN and STP fundamentals
Topic 9: Large-scale WLAN Architecture	6%	- Enterprise WLAN deployment basics
Topic 10: BGP	17%	- BGP policy and attributes - BGP path selection
Topic 11: IS-IS	8%	- IS-IS protocol fundamentals
Topic 12: OSPF	16%	- OSPF areas and LSDB - OSPF core concepts
Topic 13: Network Security	9%	- ACL and basic security mechanisms

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q309-Q314):

NEW QUESTION # 309
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. Router IDs conflict.
B. Area IDs are different.
C. The N-bit and E-bit of Hello packets are the same.
D. Hello time values are different.

Answer: A,C

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 # 310
Regarding the description of the VRRP slave device, which is correct? (Multiple choice)

A. The slave will discard IP packets whose destination MMC address is the virtual MAC address
B. The slave responds to the IP packet whose destination IP address is the virtual IP address
C. When receiving a VRRP message with a priority of 0, the Slave will directly switch to the Master
D. When the slave receives the VRRP message sent by the Master, it can judge whether the status of the Master is normal

Answer: A,D

NEW QUESTION # 311
By default, in the VRP version, when the BGP neighbor ingress routing policy (route-policy) changes, refresh will be automatically sent to the neighbor to request the neighbor to resend an Update message.

A. FALSE
B. TRUE

Answer: B

NEW QUESTION # 312
Which of the following descriptions about BGP routing are correct? (Multiple choice)

A. BGP supports network and import-route to inject routes
B. The import-route method supports injecting direct routes into the BGP routing table
C. Similar to ordinary IGP, BGP itself also calculates and generates routes
D. BGP can aggregate based on existing routing entries

Answer: A,B,D

NEW QUESTION # 313
On an OSPF network, two directly connected routers fail to establish a neighbor relationship. The display ospf error command is run on one of the routers, and the command output is as follows:

Based on the command output, which of the following is the cause of the problem?

A. OSPF Auth Data values are the same.
B. OSPF area IDs are the same.
C. OSPF Auth Types are the same.
D. OSPF router IDs are the same.

Answer: D

NEW QUESTION # 314
......

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