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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Advanced BGP Features | 10% | - BGP multi-homing and load balancing - Routing policies and filtering - BGP route selection and attributes - Route reflectors and confederations |
| Topic 2: Network O&M | 7% | - Network monitoring and performance analysis - Routine maintenance procedures - Configuration management and backup - Log and alarm management |
| Topic 3: Advanced Ethernet Technologies | 10% | - QinQ and VLAN mapping - Port isolation and security features - VLAN aggregation and MUX VLAN - Ethernet link aggregation and reliability |
| Topic 4: IPv6 Routing | 20% | - IPv6 address planning and configuration - OSPFv3 and IS-IS for IPv6 - BGP4+ for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) |
| Topic 5: Advanced IGP Features | 17% | - OSPF advanced features
|
| Topic 6: MPLS Technologies | 19% | - LDP and RSVP-TE protocols - MPLS fundamentals and label distribution - MPLS OAM and protection - MPLS VPN (L3VPN, L2VPN) |
| Topic 7: Network Cutover | 7% | - Implementation and rollback strategy - Pre-cutover verification - Cutover planning and risk assessment - Post-cutover validation |
| Topic 8: Network Troubleshooting | 10% | - Routing protocol fault diagnosis - Performance and service fault resolution - Structured troubleshooting methodology - Switching and link fault handling |
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NEW QUESTION # 70
The device operating environment is crucial for stable device operating, including the equipment room, power supply, and heat dissipation. Maintenance personnel must be on site to maintain the device operating environment.
Answer: A
NEW QUESTION # 71
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:
Answer: A,C
Explanation:
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
NEW QUESTION # 72
By default, the Domain ID of each OSPF process running on the router is the same as the process number of the process, which can be modified by the domain-id command under the process
Answer: A
NEW QUESTION # 73
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:
Answer: A,B,D
Explanation:
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
NEW QUESTION # 74
On the IS-IS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. Which of the following routers have the default route in their routing tables?
Answer: A,B,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the IS-IS Network Structure in the Question:
* Router Roles & IS-IS Levels:
* R1 and R3: Level-1 routers.
* R2: Level-1-2 router (interconnects Level-1 and Level-2 areas).
* R4: Level-2 router.
* Key Command Used: default-route-advertise always level-1
* This command forces R1 to advertise a default route (0.0.0.0/0) to all Level-1 routers.
* In an IS-IS network:
* Level-1 routers do not see Level-2 routes unless a default route is provided.
* The default route is propagated only within the Level-1 area and does not affect Level-2 routers unless explicitly redistributed.
Route Distribution Analysis:
* R1 (Level-1) imports the default route and advertises it to all Level-1 routers.# R1 has the default route.
* R3 (Level-1) is in the same Level-1 area as R1, so it receives the default route from R1.# R3 has the default route.
* R2 (Level-1-2) connects Level-1 and Level-2. Since it participates in Level-1, it also learns the default route from R1.# R2 has the default route.
* R4 (Level-2) is not in Level-1 and does not receive the default route unless it is explicitly redistributed from Level-1 to Level-2, which is not stated in the question.# R4 does NOT have the default route.
Final Conclusion:
* R1, R2, and R3 have the default route.
* R4 does not have the default route.
Thus, the correct answer is:
# R1, R2, and R3 have the default route in their routing tables.
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - IS-IS Default Route Advertisement Huawei Official HCIP-Datacom Study Guide - IS-IS Level-1 and Level-2 Routing Concepts Huawei Documentation on default-route-advertise always level-1 Command
NEW QUESTION # 75
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