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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Ethernet Technologies | 10% | - VLAN and Ethernet enhancements - MAC/security features |
| Topic 2: Advanced BGP Features | 10% | - BGP policy controls - Route reflector and attributes |
| Topic 3: Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
| Topic 4: IPv6 Routing | 20% | - IPv6 static and dynamic routing - OSPFv3/IS-IS for IPv6 |
| Topic 5: Troubleshooting | 10% | - Network diagnostics - Issue resolution strategies |
| Topic 6: Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| Topic 7: MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| Topic 8: Network O&M | 7% | - Operation & maintenance best practices - Monitoring and health metrics |
>> Sample H12-831_V1.0-ENU Questions <<
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NEW QUESTION # 81
Which of the following statements about VLAN aggregation is true?
Answer: A,D
NEW QUESTION # 82
A network engineer deletes the IP address of an interface by mistake using a command. To view the deleted IP address, which of the following information should be queried?
Answer: A
Explanation:
Huawei network devices provide several information-management mechanisms, including logs, traps, debugging information, and SNMP management data.
Log information is the appropriate starting point when investigating a configuration change made by an administrator.
Depending on the device software version and enabled logging functions, configuration-operation logs may record commands executed by administrators, including IP address modifications and deletions.
The administrator can examine available logs using commands such as display logbuffer or investigate saved log files.
SNMP agent information primarily provides information used by management systems. Trap messages normally report significant events or state changes, while debugging information provides detailed protocol or system diagnostics.
Neither traps nor debugging output is the primary source for reconstructing an accidental configuration change.
Therefore, option C is correct. Recovering the exact deleted address depends on whether the relevant configuration-operation records were retained.
NEW QUESTION # 83
On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers.
The ipv6 default-route-advertise always level-1 command is configured in the IS-IS process of R4.
Which of the following routers does not have the default route in its routing table?
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the IS-IS Network Structure in the Question:
* IS-IS Area IDs and Router Roles
* Area 49.0001 (Level-1-2): Contains R1, R2, R4 (all Level-1-2 routers).
* Area 49.0002 (Level-1-2 & Level-1): Contains R3 (Level-1-2) and R5 (Level-1 only).
* Key Command Used: ipv6 default-route-advertise always level-1
* This command forces R4 to advertise a default route (::/0) to all Level-1 routers within its area.
* Only Level-1 routers in the same area as R4 will receive the default route.
* Level-2 routers do not receive or propagate this default route unless additional configuration is done.
Route Distribution Analysis:
* R4 (Level-1-2) is configured to advertise a default route to Level-1 routers.
* R1 and R2 (both Level-1-2) are in the same area (49.0001) as R4, so they receive the default route.
* R3 (Level-1-2) is in area 49.0002 but connects to R4 (49.0001), meaning it can receive the default route through its Level-1 connection.
* R5 (Level-1 only) is in area 49.0002, but R4 does not propagate the default route to another Level-1 area (49.0002).
* Since R5 is a Level-1 router and does not have a Level-2 connection, it cannot receive the default route from R4.
Final Conclusion:
# R1 receives the default route.
# R2 receives the default route.
# R3 receives the default route.
# R5 does NOT receive the default route.
Thus, the correct answer is: C. R5.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IS-IS Multi-Topology and IPv6 Routing Huawei Official HCIP-Datacom Study Guide - IS-IS Default Route Advertisement for Level-1 and Level-2 Areas Huawei Documentation on ipv6 default-route-advertise always level-1 Command Behavior
NEW QUESTION # 84
A network engineer obtains a multicast data frame whose destination MAC address is 01-00-5e-00-01-01.
Given this, which of the following cannot be the destination IPv4 address of this frame?
Options:
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
* Multicast MAC addresses follow the format 01-00-5E-XX-XX-XX, derived from the IPv4 multicast address (224.0.0.0 - 239.255.255.255).
* The lower 23 bits of the IPv4 multicast address are mapped to the MAC address, causing ambiguity because different IPv4 multicast addresses can share the same MAC address.
* The IPv4 multicast range (224.0.0.0 - 239.255.255.255) is divided as follows:# 224.0.0.0 -
224.0.0.255: Local Network Control Block (e.g., 224.0.0.1)# 224.0.1.0 - 238.255.255.255: Global and Reserved Multicast (e.g., 224.0.1.1, 225.0.1.1)# 239.0.0.0 - 239.255.255.255: Private Multicast (Not mapped to 01-00-5E)
* The MAC 01-00-5e-00-01-01 corresponds to an IPv4 multicast address in the range 224.0.0.0 -
238.255.255.255, but not to 239.128.1.1, because addresses in the 239.x.x.x range are private multicast addresses.
# Reference: HCIP-Datacom Advanced Routing & Switching Technology - Multicast MAC Address Mapping
NEW QUESTION # 85
As shown in the figure, a sham link is established between PE1 and PE2 through the LoopBackD interface. CE2 can learn the route to the 192.168.1.0/24 network segment (the direct route on CE1) through the sham link and backdoor link. If you keep the default configuration, the cost value of the route from CE2 to the 192.168.1.0/24 network segment should be (). (Please fill in the Arabic numerals directly, without symbols)
Answer:
Explanation:
4
NEW QUESTION # 86
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