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| Section | Weight | Objectives |
|---|---|---|
| IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
| Network O&M | 7% | - Monitoring and health metrics - Operation & maintenance best practices |
| Advanced BGP Features | 10% | - Route reflector and attributes - BGP policy controls |
| Advanced Ethernet Technologies | 10% | - MAC/security features - VLAN and Ethernet enhancements |
| Troubleshooting | 10% | - Issue resolution strategies - Network diagnostics |
| Network Cutover | 7% | - Migration planning techniques - Rollback procedures |
| MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
>> H12-831_V1.0-ENUテストトレーニング <<
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質問 # 210
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:
正解：A、C、D
解説：
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Network Topology
* R1 and R2 are OSPF-enabled routers connected via the 10.0.12.0/24 subnet (Area 0) .
* PC1 (192.168.1.2/30) is connected to R1 via GE0/0/1 .
* PC2 (192.168.1.22/30) is connected to R2 via GE0/0/1 .
* OSPF ensures that R1 and R2 know about each other ' s directly connected networks .
2. Analyzing Connectivity
* Can R1 ping 192.168.1.22 (PC2)?
* Yes, if routing is properly configured.
* OSPF ensures that R1 learns about 192.168.1.22 from R2.
* Since R1 has a route to 192.168.1.22 via R2 , it can ping PC2 successfully .
* # Option A is correct.
* Can R1 ping 192.168.1.21 (R2 ' s interface)?
* Yes, since R1 and R2 are OSPF neighbors.
* R1 learns 192.168.1.21 via OSPF and can reach it directly.
* # Option B is correct.
* Can R2 ping 192.168.1.2 (PC1)?
* Yes, since OSPF ensures that R2 learns about 192.168.1.2 from R1.
* Since R2 has a route to 192.168.1.2 via R1 , it can ping PC1 successfully .
* # Option C is correct.
* Can PC1 and PC2 ping each other?
* Yes, if default gateways and routing are configured correctly.
* If R1 and R2 can ping each other and forward packets, PC1 and PC2 should be able to communicate.
* # Option D is incorrect because PC1 and PC2 should be able to ping each other .
Final answer:
# A, B, and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Inter-Router Communication and Route Advertisement
* Default Gateway and Routing in Multi-Router Networks
* Troubleshooting End-to-End Connectivity in Routed Networks
質問 # 211
In the finishing work of the structured network troubleshooting process, which of the following are the documents that need to be handed over? (Multiple choice)
正解：A、B、C
質問 # 212
When dealing with a fault in the existing network, a network engineer drew a topology diagram as shown in the figure. All routers run SPF. Which of the following descriptions about the access path between PC1 and PC2 is correct?
正解：D
質問 # 213
When MPLS is deployed in the network and the network layer protocol is IP, the route corresponding to the FEC must exist in the IP routing table of the LSR, otherwise the label forwarding entry of the FEC will not take effect.
正解：A
質問 # 214
On the OSPFv3 network shown in the figure, area 1 is a stub area.
Which of the following LSAs is generated by only one router?
正解：B
解説：
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPFv3 LSA Types
* OSPFv3 uses different LSA types than OSPFv2, with some being similar in function:
* Link-LSA (Type 8): Generated by every router on a link to advertise link-local IPv6 information.
* Intra-Area-Prefix-LSA (Type 9): Advertises IPv6 prefixes within an area.
* Network-LSA (Type 2): Generated only by the Designated Router (DR) to advertise information about all routers on a multi-access network.
* Inter-Area-Prefix-LSA (Type 3): Advertises network prefixes between OSPF areas (generated by ABRs).
Route Distribution Analysis:
A). Inter-Area-Prefix-LSA (Type 3) # (Incorrect)
* Generated by an ABR to advertise prefixes between OSPF areas.
* More than one ABR can generate this LSA.
# Not always generated by only one router.
B). Link-LSA (Type 8) # (Incorrect)
* Each router generates its own Link-LSA for each link it participates in.
* This means multiple routers can generate this LSA.
# Not generated by only one router.
C). Network-LSA (Type 2) # (Correct)
* Generated ONLY by the Designated Router (DR) on a multi-access network (such as an Ethernet link).
* Other routers do not generate this LSA, only the DR does.
# Correct answer: This LSA is generated by only one router (the DR).
D). Intra-Area-Prefix-LSA (Type 9) # (Incorrect)
* Generated by any router to advertise IPv6 prefixes within an area.
* Multiple routers in an area can generate this LSA.
# Not generated by only one router.
Final Conclusion:
# C. Network-LSA (Type 2) is the correct answer because it is generated by only one router-the Designated Router (DR).
Thus, the correct answer is: C. Network-LSA.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - OSPFv3 LSA Types and Multi-Area Behavior Huawei Official HCIP-Datacom Study Guide - OSPFv3 Stub Areas and LSA Advertisements Huawei Documentation on OSPFv3 DR/BDR Roles and LSA Generation
質問 # 215
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