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Huawei H12-831_V1.0 Exam Syllabus Topics:

Section	Weight	Objectives
MPLS Technologies	19%	- MPLS VPN (L3VPN, L2VPN) - LDP and RSVP-TE protocols - MPLS OAM and protection - MPLS fundamentals and label distribution
Network Cutover	7%	- Post-cutover validation - Implementation and rollback strategy - Cutover planning and risk assessment - Pre-cutover verification
Network Troubleshooting	10%	- Structured troubleshooting methodology - Switching and link fault handling - Routing protocol fault diagnosis - Performance and service fault resolution
Advanced BGP Features	10%	- Route reflectors and confederations - BGP multi-homing and load balancing - BGP route selection and attributes - Routing policies and filtering
Advanced IGP Features	17%	- OSPF advanced features 1. Fast convergence technologies 2. Route summarization and filtering 3. Special area types and applications - IS-IS advanced features 1. Convergence optimization 2. Level-1/Level-2 routing control 3. Route aggregation
IPv6 Routing	20%	- Transition mechanisms (dual-stack, tunnel, translation) - OSPFv3 and IS-IS for IPv6 - BGP4+ for IPv6 - IPv6 address planning and configuration
Network O&M	7%	- Log and alarm management - Routine maintenance procedures - Network monitoring and performance analysis - Configuration management and backup
Advanced Ethernet Technologies	10%	- QinQ and VLAN mapping - Port isolation and security features - Ethernet link aggregation and reliability - VLAN aggregation and MUX VLAN

Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:

Question #1

A network engineer draws a schematic diagram of a multicast network (shown in the figure) during troubleshooting. R1 and R2 run IGMP version 2 and use PIM-SM as the multicast routing protocol. The default settings are used for other parameters. Given this, the DR on the multicast network is _____. (Enter the device ID, for example, R1.)

Reveal Solution Discussion 0

Correct Answer:

R2
Explanation:
PIM Sparse Mode (PIM-SM) elects a Designated Router (DR) on a shared network segment to coordinate multicast source registration and receiver-side multicast forwarding.
The election first compares the DR priorities advertised in PIM Hello messages.
The router with the highest DR priority is selected. When routers have equal priorities, the router with the numerically highest interface IP address wins.
In the topology, R1 uses 10.0.12.1/24 and R2 uses 10.0.12.2/24. Both routers use default DR priority values.
Because 10.0.12.2 is higher than 10.0.12.1, R2 is elected as the PIM-SM Designated Router.
This differs from the IGMPv2 querier election, which selects the router with the lowest IP address. Thus, R1 would be the IGMP querier, but R2 is the PIM-SM DR.

Question #2

A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where:
* R1 and R2 both have OSPF enabled.
* R1 and R2 function as the gateways for PC1 and PC2, respectively.
Given this, which of the following statements are true?

Options:

A. R1 can ping 192.168.1.22.
B. R1 can ping 192.168.1.21.
C. PC1 and PC2 cannot ping each other.
D. R2 can ping 192.168.1.2.

Reveal Solution Discussion 0

Correct Answer: A,B,D 🗳️

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Question #3

There are two types of network maintenance: routine maintenance and troubleshooting. Skilled maintenance personnel can maintain the network based on their experience, without needing to comply with the operation guidelines.

A. FALSE
B. TRUE

Reveal Solution Discussion 0

Correct Answer: A 🗳️

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Question #4

VLAN aggregation is configured on a switched network. Sub-VLAN 2 and Sub-VLAN 3 are added to Super- VLAN 10.
To enable hosts in different Sub-VLANs to communicate with each other, run the _____ inter-sub-vlan-proxy enable command in the view of VLANIF 10, corresponding to the Super-VLAN.
(Enter the answer in lowercase letters only.)

Reveal Solution Discussion 0

Correct Answer:

supervlan
Explanation:
1. Understanding VLAN Aggregation in Huawei Switches
* VLAN aggregation is a technique that groups multiple VLANs (sub-VLANs) under a single Super- VLAN.
* Super-VLANs do not have member interfaces but include multiple Sub-VLANs that share a common gateway (VLANIF interface).
2. Inter-Sub-VLAN Communication Requirement
* By default, hosts in different sub-VLANs cannot communicate directly.
* To enable communication between different sub-VLANs within the same Super-VLAN, an inter-sub- VLAN proxy must be enabled.
* This is done using the inter-sub-vlan-proxy enable command in the VLANIF interface of the Super- VLAN.
3. Correct Command Usage
* The command format is:
shell
CopyEdit
supervlan inter-sub-vlan-proxy enable
* This command must be executed under VLANIF 10, corresponding to the Super-VLAN.
4. Why is the Answer " supervlan " ?
* The missing parameter in the command should be supervlan, because it is used to enable communication between Sub-VLANs under a Super-VLAN.
* This is a specific Huawei command used in HCIP-Datacom-Advanced Routing & Switching Technology certification.

Question #5

A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where R1 and R2 both have OSPF enabled, and function as the gateways of PC1 and PC2, respectively. Given this, which of the following statements are true?