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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Network O&M | 7% | - Data collection - Routine maintenance |
| Topic 2: IPv6 Routing | 20% | - OSPFv3 - IS-IS for IPv6 - BGP4+ - IPv6 static routes |
| Topic 3: MPLS Technologies | 19% | - MPLS forwarding - MPLS configuration - MPLS principles - MPLS VPN applications |
| Topic 4: Advanced IGP Features | 17% | - IS-IS advanced features - Route control - Fast convergence - OSPF advanced features |
| Topic 5: Advanced BGP Features | 10% | - Advanced BGP features - Route reflectors - Inter-domain routing optimization - BGP route control |
| Topic 6: Advanced Ethernet Technologies | 10% | - Ethernet security - VLANs |
| Topic 7: Network Cutover | 7% | - Basic cutover concepts - Migration process |
| Topic 8: Network Troubleshooting | 10% | - Troubleshooting methods - Structured troubleshooting processes |
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NEW QUESTION # 34
As shown below:
IR2] ad 2000
[R2-ad-basic-2000]rule deny
[R2-ad-basic-2000]quit
#
[R2] ospf
[R2-ospf»1]area 1
[R2-ospM-area-0.0.0.1] filter 2000 import
[R2-ospf-1-area-0.0.0,1] quit
[R2-ospf-1] default-route-advertise always
Answer: B
NEW QUESTION # 35
On the OSPF network shown in the figure, a network engineer finds that R1 and R2 have the same router ID, and both have imported default routes (with the default-route-advertise always command configured). Given this, which of the following statements is false?
Answer: A
NEW QUESTION # 36
On the OSPF network shown in the figure, drag the values on the left to the correct positions so that the traffic from PC1 to PC2 is sent along the path PC1 # R1 # R3 # R2 # PC2, and the traffic from PC2 to PC1 is sent along the path PC2 # R2 # R1 # PC1.
Answer:
Explanation:
Explanation:
# Objective:
* Asymmetric routing via OSPF cost manipulation
* PC1 to PC2 must go through: R1 # R3 # R2
* PC2 to PC1 must go through: R2 # R1
# Step-by-Step Cost Logic:
* Path PC1 # R1 # R2 (direct path) must be less preferred than PC1 # R1 # R3 # R2 # Therefore, make Cost A (R1-R2) high (least preferred) # Set A = 50
* Path PC1 # R1 # R3 # R2 should be preferred # Cost = C (R1 - R3) + 10 (R3 - R2) # Set C = 30 , so total = 30 + 10 = 40 , which is less than 50
* From PC2 to PC1 , we want to use R2 # R1 # So R2 must see R1 as best next-hop to PC1 # Ensure B (R2 - R3) + C is higher than A # Set B = 10 , so B + C = 10 + 30 = 40, which is more than A = 50 only if C were higher (which it isn't), but in reverse direction it's fine because R2 will still prefer direct
10 over B + 10 = 40.
# Final Answer Summary:
Label
Value
A
50
B
10
C
30
Official Huawei Extract:
" In OSPF, routing decisions are made based on cost. By manipulating interface costs, you can influence directional path selection (asymmetric routing). Lower total cost equals higher preference. "
- [Huawei HCIA-Datacom Certification Guide - OSPF Cost and Path Selection]
NEW QUESTION # 37
When a device is abnormal or fails, it will generate a variety of information. According to the severity or urgency of the information, the information is divided into 8 levels. Which of the following has the highest severity level?
Answer: B
NEW QUESTION # 38
On the OSPFv3 network shown in the figure, area 1 is a common area. R2 generates an Inter-Area-Prefix- LSA to describe the routes of a network segment in the area. Such an LSA exists in both area 0 and area 1.
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:To determine whether the statement is true or false, we need to analyze the OSPFv3 topology, the role of area types, and the behavior of Inter-Area-Prefix-LSAs. Let' s break it down step by step:
* Understanding the OSPFv3 Topology and Area Types:
* The figure shows three routers (R1, R2, and R3) connected in an OSPFv3 network. R1 and R2 are in Area 0 (the backbone area), while R2 and R3 are in Area 1 (a common area, also known as a standard or regular area).
* R2 is an Area Border Router (ABR) because it connects Area 0 and Area 1. ABRs are responsible for summarizing and advertising routes between areas.
* What is a Common Area in OSPFv3?:
* A "common area" in OSPFv3 refers to a standard or regular OSPF area, as opposed to special areas like Stub, Totally Stubby, Not-So-Stubby Area (NSSA), or Totally NSSA. Common areas allow all types of LSAs, including inter-area, intra-area, and external LSAs, to be flooded within the area, except for restrictions in special area types.
* Since Area 1 is described as a "common area," it behaves like a standard OSPF area, allowing the full exchange of LSAs, including Inter-Area-Prefix-LSAs.
* Role of Inter-Area-Prefix-LSA (Type 3 LSA in OSPFv3):
* Inter-Area-Prefix-LSAs (Type 3 LSAs in OSPFv3) are used by ABRs to advertise prefixes from one area to another. These LSAs are critical for inter-area routing, allowing routers in one area to learn about networks in other areas.
* In this case, R2, as an ABR, generates Inter-Area-Prefix-LSAs to describe routes (network segments) in Area 1 and advertises them into Area 0. Conversely, R2 also receives Inter-Area- Prefix-LSAs from Area 0 (via R1) and advertises them into Area 1.
* Does the Inter-Area-Prefix-LSA Exist in Both Area 0 and Area 1?:
* Yes, Inter-Area-Prefix-LSAs exist in both areas because R2, as an ABR, floods these LSAs into both Area 0 and Area 1. Specifically:
* R2 generates Inter-Area-Prefix-LSAs for network segments in Area 1 and advertises them into Area 0, where R1 (in Area 0) can receive and process them.
* Similarly, R2 receives Inter-Area-Prefix-LSAs for network segments in Area 0 (from R1) and advertises them into Area 1, where R3 (in Area 1) can receive and process them.
* Since Area 1 is a common area (not a stub or NSSA), it allows Inter-Area-Prefix-LSAs to be flooded within the area, ensuring that routers like R3 can learn about routes in Area 0, and routers like R1 can learn about routes in Area 1.
* Verifying the Statement:
* The statement claims that R2 generates an Inter-Area-Prefix-LSA to describe the routes of a network segment in Area 1, and such an LSA exists in both Area 0 and Area 1. This is accurate because:
* R2, as an ABR, generates Inter-Area-Prefix-LSAs for Area 1's network segments and floods them into Area 0.
* R2 also receives and floods Inter-Area-Prefix-LSAs from Area 0 into Area 1.
* Therefore, Inter-Area-Prefix-LSAs describing routes in Area 1 exist in both Area 0 and Area 1, making the statement true.
* Conclusion:
* The statement is true because Inter-Area-Prefix-LSAs generated by R2 for Area 1's network segments are flooded into both Area 0 and Area 1, and Area 1, being a common area, allows these LSAs to exist within it.
References to HCIP-Datacom-Advanced Routing & Switching Technology Documents:
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Section on OSPFv3: OSPF Area Types, Inter-Area Routing, and LSA Types (specifically Inter-Area-Prefix-LSA, Type 3 LSA).
* HCIP-Datacom-Advanced Routing & Switching Technology V1.0, Chapter on OSPF Routing Protocols: ABR Behavior, Common Areas, and LSA Flooding Mechanisms.
NEW QUESTION # 39
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