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Huawei H12-821_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Routing Basics	3%	- Routing table composition and selection rules - Routing concepts and classification
WLAN Basics	2%	- WLAN deployment and optimization - WLAN technology principles
Network Security	8%	- ACL and packet filtering - AAA authentication - Attack defense and security policy
IPv6 Technologies	3%	- IPv6 routing protocols - IPv6 address structure and configuration
Network Service and Management	5%	- Network management and monitoring - DHCP and DNS services
OSPF Fundamentals	16%	- OSPF configuration and optimization - OSPF principles and operation mechanisms - OSPF special applications and troubleshooting
Routing and Traffic Control	10%	- Route import and redistribution - Policy-based routing - Routing policy and filtering
IS-IS Fundamentals	8%	- IS-IS configuration and deployment - IS-IS protocol principles
Multicast Technologies	9%	- IGMP protocol - Multicast basic concepts - PIM protocol
Network Solutions and Design	5%	- Typical network architecture and solution - Enterprise network design principles
Ethernet Switching Technologies	7%	- Spanning Tree Protocol - Link aggregation and stack technology - VLAN principles and configuration
BGP Fundamentals	17%	- BGP route attributes and selection - BGP configuration and policy application - BGP characteristics and working principles
Network Reliability	7%	- Device redundancy and link backup - VRRP protocol - BFD technology

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q188-Q193):

NEW QUESTION # 188
As shown in the figure, SWA, SWB, and SWC run the Rapid Spanning Tree Protocol (RSTP). What are the roles of SWB's GE0/0/2 and SWC's GE0/0/1?

A. Backup port, root port
B. Alternative port, backup port
C. Backup port, alternative port
D. Root port, designated port

Answer: D

Explanation:
In the topology, SWB's GE0/0/2 is the Root Port because it has the least cost path to the Root Bridge (SWA).
SWC's GE0/0/1 is the Designated Port because it forwards traffic to SWA while maintaining the shortest path to the Root Bridge. This setup ensures efficient traffic flow in the spanning tree topology .

NEW QUESTION # 189
Which of the following descriptions of VRRP versions is incorrect?

A. VRRPv2 supports authentication function
B. VRRPv3 does not support authentication function
C. The time interval for VRRPv2 to send advertisement messages is in seconds.
D. VRRPv2 is suitable for both IPv4 and IPv6 networks

Answer: D

NEW QUESTION # 190
Route summarization can effectively reduce the number of BGP routes. However, many parameters need to be properly set when configuring BGP route summarization. Otherwise, problems such as routing loops may occur.
Which of the following statements is false about BGP route summarization?

A. If the summary automatic command is run on a device, the device summarizes subnet routes based on natural network segments.
B. If the aggregate command with suppress-policy specified is run on a device, the device advertises only the specific routes that match the given routing policy.
C. If the aggregate command with detail-suppressed specified is run on a device, the device advertises only the summary route.
D. If the aggregate command is run on a device, the device advertises both specific and summary routes.

Answer: D

Explanation:
Option B isfalse. By default, when the aggregate command is usedwithout any options, BGP generates asummary route, andsuppresses the specific routesthat fall under that summary. To advertise both specific and summary routes, you mustexplicitly configurethe detail-suppressed option to control whether specifics are suppressed or not.
Explanation of the other options:
Ais correct: When suppress-policy is specified, only specific routes matching the policy are advertised; others are suppressed.
Cis correct: The summary automatic command causes summarization based on classful boundaries, which is a legacy behavior.
Dis correct: With detail-suppressed, only the summary route is advertised, not specific prefixes.
Reference from Huawei HCIP-Datacom-Core Technology Study Guide:
"The aggregate command suppresses specific routes by default unless explicitly configured otherwise. Use of suppress-policy or detail-suppressed allows control over which routes are advertised." (Chapter: BGP Advanced Features - Section: Route Aggregation)

NEW QUESTION # 191
As shown in the figure, R1 and R2 are in a backup group. After R2 fails, R1 becomes the Master device.

Now if R2 returns to normal, which of the following actions will occur?

A. Immediately switch to Backup device
B. Switch to Master device in about 3.61 seconds
C. Switch to Master device in 0.61 seconds
D. Immediately switch to Master device

Answer: D

NEW QUESTION # 192
Which of the following descriptions of multicast routing are correct? (Multiple choice)

A. Multicast routing protocols are divided into intra-domain multicast routing protocols and inter-domain multicast routing protocols.
B. Multicast routing protocols include IGMP protocol
C. If an upstream neighbor or downstream neighbor on the multicast distribution tree is unreachable, multicast routing will re-converge.
D. Multicast routing protocols are used to establish and maintain multicast routes, and forward multicast packets correctly and efficiently.

Answer: A,C,D

NEW QUESTION # 193
......

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