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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIP-Datacom-Advanced Routing & Switching Technology V1.0 |
| Exam Number: | H12-831_V1.0 |
| Related Certifications: | HCIP-Datacom |
| Available Languages: | Chinese, English |
| Exam Format: | Multiple-answer Question, Single-answer Question, Drag and Drop Item, True or False, Short Response Item |
| Passing Score: | 600/1000 |
| Exam Price: | USD 180 |
| Exam Duration: | 90 minutes |
| Sample Questions: | Huawei H12-831_V1.0-ENU Sample Questions |
| Exam Way: | Written examination |
| Pre Condition: | It is recommended to complete HCIA-Datacom certification in advance. Prerequisite exam: H12-821 (HCIP-Datacom-Core Technology). |
| Official Syllabus URL: | https://e.huawei.com/en/talent/Halp/#/cert/plan-detail?certCode=HCIP-Datacom-Advanced%20Routing%20&%20Switching%20Technology |
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Huawei H12-831_V1.0-ENU (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) Certification Exam is a professional-level certification exam offered by Huawei. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification exam is designed to test the candidate's knowledge and skills in advanced routing and switching technologies. H12-831_V1.0-ENU Exam is intended for network engineers and administrators who are responsible for designing, implementing, and managing complex network infrastructures.
NEW QUESTION # 239
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?
Answer: A
Explanation:
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.
NEW QUESTION # 240
When an IP packet passes through an MPLS network, an MPLS device processes the TTL value in the packet.
If the pipe mode is used in the topology shown in the figure, which of the following is the TTL value in the IP packet?
Options:
Answer: C
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding MPLS TTL Processing
* TTL (Time to Live) is an IP field that prevents routing loops by decrementing at each hop.
* In an MPLS network, the TTL field can be processed in two modes:
* Uniform Mode (Default Mode)
* Pipe Mode (TTL is preserved in the MPLS domain)
2. TTL Processing in Pipe Mode
Pipe mode is used to prevent the MPLS backbone from affecting the TTL of an IP packet.
* When an IP packet enters the MPLS domain, the original TTL is copied into the MPLS header.
* Inside the MPLS network:
* MPLS labels use their own TTL values, and the IP TTL is not decremented.
* Each P router (transit router) decrements only the MPLS TTL, not the IP TTL.
* When the packet leaves the MPLS domain (at PE2):
* The original IP TTL is restored but decremented by 1 as it exits to CE2.
3. Analyzing the TTL Behavior in the Given Topology
* Initial IP TTL from CE1 = 255
* At PE1:
* IP TTL remains 255 as it is copied into the MPLS label.
* MPLS TTL starts at 255 (same as IP TTL).
* At P Router:
* MPLS TTL is decremented (255 # 254).
* IP TTL remains unchanged (255) because of Pipe mode.
* At PE2 (Egress Router):
* IP TTL is restored and decremented by 1 (255 # 254).
Thus, the correct sequence is:# IP TTL: 255 # 255 # 254
4. Evaluating the Answer Choices
Option
TTL Values
Correct?
Reasoning
A
255 # 254 # 252
# Incorrect
IP TTL should remain 255 inside MPLS
B
254 # 253 # 252
# Incorrect
IP TTL starts at 255, not 254
C
255 # 255 # 254
# Correct
IP TTL is preserved in pipe mode inside MPLS and decremented only at egress.
D
254 # 254 # 253
# Incorrect
Initial IP TTL should be 255, not 254
# Correct answer: C. 255 # 255 # 254
Final Conclusion:
* Pipe mode ensures that the MPLS domain does not affect the IP TTL while the packet is inside the MPLS network.
* Only the egress PE (PE2) decrements the IP TTL before forwarding the packet to CE2.
* Thus, the correct TTL sequence is 255 # 255 # 254.
NEW QUESTION # 241
In the OSPFv3 network shown in the figure, the Router IDs of R1, R2, and R3 are 10.0.1.1,
10.0.2.2, and 10.0.3.3 respectively.
Please complete the port number on each route according to the LSDB information.
Answer:
Explanation:
NEW QUESTION # 242
On the OSPF network shown in the figure, area 1 is a totally NSSA, area 2 is a common area, and R4 imports an external route 10.0.4.4/32. The router ID of each router is 10.0.X.X, where X is the number of the router.
The asbr-summary 10.0.4.0 255.255.255.0 command is configured in the OSPF processes of R1 and R3.
Which of the following statements is true?
Answer: A
Explanation:
R4 is an ASBR inside Area 1, which is configured as a totally NSSA. When R4 imports 10.0.4.4/32, it originates a Type 7 NSSA LSA within Area 1. Therefore, option A is incorrect: a totally NSSA can contain Type 7 LSAs for external routes imported locally.
Type 7 LSAs have area-local flooding scope. R1 and R3, acting as NSSA ABRs, do not flood the original Type 7 LSA into Area 0 or Area 2. Instead, the selected translator converts the external information into a Type 5 LSA. The configured asbr-summary 10.0.4.0 255.255.255.0 command causes the translated external information to be advertised as the summarized 10.0.4.0/24 Type 5 LSA.
Area 2 is a common area and therefore cannot contain Type 7 LSAs. Option C is incorrect because Area 0 receives the translated Type 5 external LSA. Option D is not a valid conclusion because common and backbone areas support Type 4 LSAs, and asbr-summary does not suppress that LSA type. Huawei's LSA support table explicitly identifies Type 7 as supported only in NSSA and totally NSSA areas. Huawei OSPF documentation
NEW QUESTION # 243
In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.XX, and the AS number is
6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.
If the "ageregate 192.168.1.016 detail-suppresed command" is configured on R1, which of the following is the traffic path from R3 to 192.168.1.0/24?
Answer: B
NEW QUESTION # 244
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