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Huawei H12-821_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Network Solutions and Design	5%	- Typical network architecture and solution - Enterprise network design principles
Topic 2: Multicast Technologies	9%	- Multicast basic concepts - IGMP protocol - PIM protocol
Topic 3: WLAN Basics	2%	- WLAN deployment and optimization - WLAN technology principles
Topic 4: OSPF Fundamentals	16%	- OSPF principles and operation mechanisms - OSPF special applications and troubleshooting - OSPF configuration and optimization
Topic 5: Routing and Traffic Control	10%	- Route import and redistribution - Routing policy and filtering - Policy-based routing
Topic 6: BGP Fundamentals	17%	- BGP route attributes and selection - BGP characteristics and working principles - BGP configuration and policy application
Topic 7: Network Service and Management	5%	- Network management and monitoring - DHCP and DNS services
Topic 8: IPv6 Technologies	3%	- IPv6 routing protocols - IPv6 address structure and configuration
Topic 9: IS-IS Fundamentals	8%	- IS-IS protocol principles - IS-IS configuration and deployment
Topic 10: Network Security	8%	- AAA authentication - ACL and packet filtering - Attack defense and security policy
Topic 11: Network Reliability	7%	- VRRP protocol - BFD technology - Device redundancy and link backup
Topic 12: Ethernet Switching Technologies	7%	- Spanning Tree Protocol - VLAN principles and configuration - Link aggregation and stack technology
Topic 13: Routing Basics	3%	- Routing table composition and selection rules - Routing concepts and classification

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Huawei HCIP-Datacom-Core Technology V1.0 Sample Questions (Q174-Q179):

NEW QUESTION # 174
The security zones created by Huawei firewall by default are untrust, dmz, and local ().

Answer:

Explanation:
trust

NEW QUESTION # 175
BGP confederations are widely used because they can reduce the number of IBGP connections in an AS.
Which of the following statements is false about confederations?

A. A confederation divides an AS into several sub-ASs, and EBGP full-mesh connections are established in each sub-AS.
B. After a confederation is configured, the original AS number is used as the confederation ID of each router.
C. The ASs outside a confederation still consider the confederation as one AS.
D. After a confederation is configured, the original IBGP attributes can be retained.

Answer: A

Explanation:
Comprehensive and Detailed in-depth Step-by-Step Explanation:BGP confederations are used to reduce the complexity of IBGP full-mesh connections within a large AS by dividing the AS into multiple sub-ASs (called "member ASs") while still appearing as a single AS to external ASs. Below is an analysis of each option:
* A. The ASs outside a confederation still consider the confederation as one AS:
* This is true. Externally, the entire confederation is seen as a single AS, identified by the main AS number.
* B. After a confederation is configured, the original IBGP attributes can be retained:
* This is true. The configuration of a confederation does not affect the IBGP attributes exchanged between routers.
* C. After a confederation is configured, the original AS number is used as the confederation ID of each router:
* This is true. The main AS number is used as the Confederation Identifier for all member ASs in the confederation.
* D. A confederation divides an AS into several sub-ASs, and EBGP full-mesh connections are established in each sub-AS:
* This is false. Within each sub-AS of a confederation, IBGP connections are still used (not EBGP). Confederations are designed to reduce the number of IBGP full-mesh connections required within a large AS by creating smaller, manageable sub-ASs.
Therefore, the correct answer is D.
References:
* Huawei HCIA-Datacom Study Guide, Chapter on "BGP Confederations".
* RFC 5065 - Autonomous System Confederations for BGP.

NEW QUESTION # 176
The figure shows theVRRP status switchover events. Match these events with their sequence numbers.

Answer:

Explanation:

Explanation:
1 # A Startup message with a priority of 255 is received.
2 # A Startup message with a priority less than 255 is received.
3 # A Shutdown message is received.
4 # The Master_Down timer expires, an Advertisement packet with the priority of 0 is received, or a packet with a priority lower than the local priority is received.
5 # A packet with a priority higher than the local priority is received.
6 # A Shutdown message is received.
#Reference:Huawei HCIA-Datacom Study Guide, VRRP Status Transitions.

NEW QUESTION # 177
See the following figure. All routers on the network run IS-IS and are in area 49.0001. By referring to the LSDB of R1, the Level-2 DIS is. (Enter the device name, for example, R1.)

Answer:

Explanation:
R3
* Understanding the LSDB and Level-2 DIS Election in IS-IS:
* In IS-IS, the Designated Intermediate System (DIS) is elected for both Level-1 and Level-2 on broadcast networks to manage the link-state database (LSDB) and reduce the number of LSAs exchanged.
* The election of the DIS is based on the highest priority. If the priority is the same, the router with the highest System ID becomes the DIS.

NEW QUESTION # 178
Which of the following statements about WLAN hot backup is incorrect? (Multiple choice)

A. When configuring VRRP hot backup, the primary and backup ACs must be on the same Layer 2 network.
B. When configuring VRRP hot backup, you can determine the active and backup roles of the AC device by configuring the VRRP priority.
C. During VRRP hot backup, the primary and backup ACs can be on different Layer 2 networks for backup through Layer 3 intercommunication.
D. In dual-link hot backup, load-sharing backup can be achieved by configuring the priority of the primary and backup ACs to be consistent.

Answer: C,D

NEW QUESTION # 179
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