Exam Name: HCIP-Datacom-Advanced Routing & Switching Technology V1.0
Certification Provider: Huawei
Corresponding Certification: HCIP-Datacom
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Huawei H12-831_V1.0-ENU Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| IPv6 Routing | 20% | - Transition mechanisms (dual-stack, tunnel, translation) - IPv6 address planning and configuration - BGP4+ for IPv6 - OSPFv3 and IS-IS for IPv6 |
| Advanced BGP Features | 10% | - BGP route selection and attributes - Routing policies and filtering - Route reflectors and confederations - BGP multi-homing and load balancing |
| Network O&M | 7% | - Routine maintenance procedures - Configuration management and backup - Network monitoring and performance analysis - Log and alarm management |
| Advanced IGP Features | 17% | - OSPF advanced features
|
| Advanced Ethernet Technologies | 10% | - VLAN aggregation and MUX VLAN - Port isolation and security features - Ethernet link aggregation and reliability - QinQ and VLAN mapping |
| MPLS Technologies | 19% | - LDP and RSVP-TE protocols - MPLS VPN (L3VPN, L2VPN) - MPLS OAM and protection - MPLS fundamentals and label distribution |
| Network Cutover | 7% | - Post-cutover validation - Implementation and rollback strategy - Pre-cutover verification - Cutover planning and risk assessment |
| Network Troubleshooting | 10% | - Structured troubleshooting methodology - Switching and link fault handling - Performance and service fault resolution - Routing protocol fault diagnosis |
Huawei HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Sample Questions:
OSPFv3 packets are encapsulated in IPv6 packets and can be sent in unicast, multicast, or broadcast mode.
- A. FALSE
- B. TRUE
Correct Answer: B 🗳️
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On the network shown in the figure, IS-IS IPv6 runs on R2, R6, and R3, and the IPv6 address of Loopback0 on R6 is 2000::6/128. OSPFv3 runs on other links. Area 1 is a common area, and area 2 is an NSSA. IS-IS routes are imported to OSPFv3 on R2 and R3. Which of the following statements are true?
- A. The routing table of R4 contains the route 2000::6/128.
- B. The routing table of R5 contains the route 2000::6/128.
- C. The routing table of R6 contains the route ::/0.
- D. The routing table of R1 contains the route 2000::6/128.
Correct Answer: A,B,D 🗳️
Explanation: Only visible for PrepAwayExam members. You can sign-up / login (it's free).
On the OSPF network shown in the figure, drag the values on the left to the correct positions so that:
* Traffic from PC1 to PC2 follows the path: PC1 - > R1 - > R3 - > R2 - > PC2
* Traffic from PC2 to PC1 follows the path: PC2 - > R2 - > R1 - > PC1
Which of the following OSPF cost values should be assigned to Cost-A, Cost-B, and Cost-C to achieve this routing behavior?
Correct Answer:
Explanation:
* A = 50
* B = 10
* C = 20
Comprehensive and Detailed In-Depth Explanation:
Understanding OSPF Path Selection and Cost Calculation:
* OSPF selects the shortest path (lowest cost) to the destination.
* The OSPF cost is determined by the cumulative sum of interface costs along a path .
* By assigning specific costs to A, B, and C , we can influence OSPF's path selection to meet the desired routing behavior.
Step-by-Step Analysis of Required Traffic Flow:
1. Traffic from PC1 to PC2 must take the route:
PC1 - > R1 - > R3 - > R2 - > PC2
* To force traffic through R3 , the cost of the direct link R1 - > R2 (Cost-A) must be higher than the alternative path via R3 .
* We assign Cost-A = 50 (high cost) to discourage direct routing from R1 - > R2 .
* The cost of R1 - > R3 (Cost-C) should be lower , so we assign Cost-C = 20 .
* The cost of R3 - > R2 (default Cost-20) remains unchanged.
* Total cost via R3: 20 (R1- > R3) + 20 (R3- > R2) = 40 , which is less than the direct link of 50 , so OSPF prefers this path.
# Traffic follows: PC1 - > R1 - > R3 - > R2 - > PC2
2. Traffic from PC2 to PC1 must take the route:
PC2 - > R2 - > R1 - > PC1
* We need to make R2 - > R1 (Cost-B) the best (lowest cost) route for return traffic .
* Assign Cost-B = 10 (low cost).
* This ensures that R2 prefers the direct path R2 - > R1 instead of R2 - > R3 - > R1 (which costs
20+20=40).
# Traffic follows: PC2 - > R2 - > R1 - > PC1
Final Cost Assignments for Correct Routing Behavior:
Cost
Assigned Value
Reason
Cost-A (R1 - > R2)
50
High to discourage direct R1- > R2 routing
Cost-B (R2 - > R1)
10
Low to ensure PC2- > PC1 prefers direct R2- > R1
Cost-C (R1 - > R3)
20
Medium to encourage R1- > R3- > R2 path
Key Takeaways:
* Higher OSPF cost discourages path selection.
* Lower OSPF cost encourages path selection.
* By manipulating OSPF cost values, we achieve asymmetric routing between PC1 and PC2.
* This aligns with OSPF path selection principles covered in HCIP-Datacom certification.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* Huawei HCIP-Datacom Official Certification Guide , Chapter on OSPF Cost Calculation and Path Selection .
* Huawei Enterprise Networking Training Materials , OSPF Path Optimization Techniques.
* Huawei Datacom Configuration Guide , OSPF Cost and Traffic Engineering.
The network administrator configures DHCP snooping on an access switch. Which of the following solutions can be used to reduce the impact of denial of service (DoS) on the DHCP server caused by malicious IP address requests of attackers?
- A. Configure DHCP snooping to limit the number of MAC addresses learned by interfaces on the switch.
- B. Enable the device to generate static MAC address entries for interfaces based on DHCP snooping binding entries.
- C. Configure DHCP snooping to check the CHADDR field in DHCP request packets.
- D. Configure the switch interface connected to the authorized DHCP server as a trusted interface.
Correct Answer: A,C,D 🗳️
Explanation: Only visible for PrepAwayExam members. You can sign-up / login (it's free).
On the OSPF network shown in the figure, the cost values of links are marked, and OSPF IP FRR is enabled on R1. Which of the following statements is false?
- A. If the link between R2 and SI is disconnected, R1 recalculates the optimal path to R3 and performs path switching instantly.
- B. If the link between R1 and SI is disconnected, R1 directly uses the backup path to forward packets to R3 because FRR is enabled on R1.
- C. If the link between R1 and SI is disconnected, Rl recalculates the optimal path to R3 and performs path switching instantly.
- D. If the link between R1 and SI is disconnected and you check neighbor information on R1, the neighbor relationship between R1 and R2 will instantly display Down.
Correct Answer: C 🗳️
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