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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced Ethernet Technologies | 10% | - Ethernet OAM and protection mechanisms - Advanced link aggregation and reliability - VLAN stacking and QinQ |
| Topic 2: MPLS Technologies | 19% | - MPLS protection and fast reroute - MPLS basics and label distribution - MPLS VPN and traffic engineering |
| Topic 3: Advanced IGP Features | 17% | - OSPF advanced features and optimization - IS-IS advanced features and convergence - IGP route selection and control |
| Topic 4: Network Cutover and Migration | 7% | - Migration strategies and risk control - Service switchover and verification |
| Topic 5: Advanced BGP Features | 10% | - BGP path control and filtering - BGP route attributes and policies - Route reflectors and confederations |
| Topic 6: IPv6 Routing | 20% | - OSPFv3 and IS-IS for IPv6 - IPv6 addressing and transition technologies - BGP4+ and IPv6 route deployment |
| Topic 7: Network Troubleshooting | 10% | - Troubleshooting routing and switching issues - Fault diagnosis and analysis methods |
| Topic 8: Network O&M | 7% | - Network monitoring and management tools - Performance optimization and capacity planning |
>> H12-831_V1.0-ENU Prüfungsaufgaben <<
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130. Frage
The figure shows the logical network architecture of a migration project . The purpose of the migration is to add network device R4 between R2 and R3 .
* OSPF runs between network devices.
* After the physical network is connected , a network engineer incorrectly imports the backup configuration of R3 to R4 during the migration .
Given this, which of the following statements are true?
Options:
Antwort: A,C
Begründung:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding OSPF Neighbor Relationships
* OSPF (Open Shortest Path First) forms neighbor relationships based on these key conditions:
* Routers must be in the same OSPF area.
* The subnet mask and network type must match.
* The Hello/Dead timers must match.
* Authentication (if enabled) must match.
2. Analyzing the Given Scenario
* R1 and R2 are in Area 0 (Backbone Area).
* R3 and R4 are in Area 1 (Non-Backbone Area).
* R4 was configured incorrectly using R3's backup configuration , which could cause issues.
3. Evaluating Each Answer Option
* Option A: " The OSPF neighbor relationship between R1 and R2 is not affected. "
* Correct.
* R1 and R2 are both in Area 0 and their configuration was not changed.
* Since R4 was added only between R2 and R3, it does not impact R1 and R2.
* # A is correct.
* Option B: " An OSPF neighbor relationship can be established between R2 and R4. "
* Incorrect.
* R2 is in Area 0, but R4 is incorrectly configured using R3's backup, which likely placed it in Area 1.
* OSPF neighbors cannot form across different areas unless an Area Border Router (ABR) is properly configured.
* Since there is no indication of an ABR setup, the adjacency will fail.
* # B is incorrect.
* Option C: " An OSPF neighbor relationship can be established between R3 and R4. "
* Correct.
* R3 and R4 are both in Area 1, and R4 ' s backup configuration comes from R3, meaning they likely have identical settings.
* Since they share the same area and are directly connected, an OSPF adjacency is possible.
* # C is correct.
* Option D: " An OSPF neighbor relationship can be established between R1 and R3. "
* Incorrect.
* R1 is in Area 0, and R3 is in Area 1.
* OSPF does not form neighbor relationships between different areas unless configured as an ABR, which is not mentioned.
* # D is incorrect.
Final answer:
# A and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Neighbor Formation and Area Design Principles
* Troubleshooting OSPF Area Mismatches and Configuration Issues
* OSPF Backbone Area (Area 0) and Inter-Area Communication
131. Frage
In the network shown in the figure, OSPF protocol runs between R1, R2, and R3. IBGP neighbor relationship is established between R1 and R3 using loopback interface, and BFD function is enabled in BGP process. BFD parameters are "bfd min-tx-interval 1000 min-rx-interval 1000 detect-maltiplier6". If OSPF is disabled on GE0/0/1 interface of R2 through "undo network xxxx yyyy" command, and BGP neighbor relationship is checked on R1, by default, the longest time for R1 BGP neighbor relationship to change from up state to down state is which of the following?
Antwort: A
132. Frage
In the OSPP network shown in the figure, R1 and R2 achieve Lopback0 interface interconnection through OSPF.
At the same time, R1 and R2 have enabled the MPLS LDP function, and the LDP transmission address is the IP address of the Loopback0 interface. The network engineer found that R1 and R2 could not establish an LDP session, so he first executed the command shown in the figure on R2. Based on this, which of the following reasons may cause the failure of establishing an LDP session between R1 and R2? (Multiple choice)
Antwort: A,D
133. Frage
Which of the following is not part of the preliminary preparations for the cutover plan?
Antwort: B
134. Frage
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.)
Antwort:
Begründung:
supervlan
135. Frage
......
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