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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| Topic 2: MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| Topic 3: IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
| Topic 4: Troubleshooting | 10% | - Issue resolution strategies - Network diagnostics |
| Topic 5: Advanced Ethernet Technologies | 10% | - MAC/security features - VLAN and Ethernet enhancements |
| Topic 6: Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
| Topic 7: Network O&M | 7% | - Operation & maintenance best practices - Monitoring and health metrics |
| Topic 8: Advanced BGP Features | 10% | - Route reflector and attributes - BGP policy controls |
>> New H12-831_V1.0-ENU Exam Objectives <<
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NEW QUESTION # 21
On the same switch interface, the administrator can only configure traffic suppression for one of the following: broadcast, unknown multicast, unknown unicast, known multicast, and known unicast packets.
Answer: B
NEW QUESTION # 22
The network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does the network administrator A need to configure at least?
Answer: D
NEW QUESTION # 23
In the network shown in the figure, PC1 and PC2 are required to belong to the same VLAN, but cannot communicate at Layer 2. Which of the following technologies can be used to achieve this?
(Multiple choice)
Answer: B,C
NEW QUESTION # 24
Which of the following sequences can be matched by the regular expression 100.S
Answer: B,D
NEW QUESTION # 25
When a fault occurs on an OSPF network, traffic can be switched to another path only after several phases. Sort these phases in the correct sequence.
Answer:
Explanation:
Explanation:
When OSPF detects a failure in the network, it performs a series of actions to ensure traffic is rerouted to a valid path. The phases occur in this strict order:
* # Fault Detection (A)
* OSPF routers use Hello packets to maintain neighbor relationships.
* If a Hello timeout or link down is detected, the fault is immediately recognized.
* # LSA Update (B)
* Upon detecting a failure, the router generates a new LSA (e.g., a Router-LSA or Network-LSA) and floods it to all other routers in the same area.
* This LSA communicates the change in network topology.
* # Route Calculation (C)
* Each router that receives the updated LSAs runs the SPF algorithm to recompute the best path to every destination.
* # Entry Delivery to the FIB (D)
* After recalculating the routes, the router installs the new forwarding entries into the FIB (Forwarding Information Base) , allowing data to be forwarded along the new optimal path.
# Official Huawei Reference:
" OSPF convergence after a network failure consists of fault detection, LSA flooding, SPF calculation, and updating the FIB. Each step must be completed for traffic to resume correctly on alternate paths. "
- [Huawei HCIA-Datacom Certification Guide - Chapter: OSPF Convergence and SPF Algorithm]
NEW QUESTION # 26
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