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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom-Carrier (Written) V1.0 |
| Exam Number: | H35-831 |
| Exam Format: | Single choice questions, Multiple choice questions |
| Certificate Validity Period: | 3 years |
| Available Languages: | Chinese, English |
| Related Certifications: | HCIP-Datacom HCIE-Datacom |
| Recommended Training: | Huawei Talent Development Courses |
| Exam Registration: | Huawei Talent Certification Portal |
| Sample Questions: | Huawei H35-831 Sample Questions |
| Exam Way: | Online proctored exam or authorized Huawei exam center |
| Pre Condition: | Recommended: HCIP-Datacom certification or equivalent networking knowledge before attempting HCIE written exam. |
| Official Syllabus URL: | https://e.huawei.com/en/talent/certification |
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Huawei H35-831 (HCIE-Datacom-Carrier (Written) V1.0) Exam is a comprehensive certification exam that is designed to test the knowledge and skills of professionals who work in the data communication and carrier industry. H35-831 exam is a challenging test that covers a wide range of topics, including network architecture, routing and switching, network security, and network management. Candidates who Pass H35-831 Exam will be recognized as experts in the field of data communication and carrier networks and will be well-prepared to design and implement complex networks that meet the needs of their clients.
NEW QUESTION # 19
Which of the following statements are accurate regarding router ID planning in a 5G transport network?
Select all that apply.
Answer: A,B,C,D
Explanation:
Huawei Reference Verification:
Huawei's 5G transport address-planning guidance emphasizes hierarchical reservations, uniqueness, consistent assignment and human-readable operational conventions. Router IDs are 32-bit identifiers that must be unique in the relevant OSPF, BGP or other routing domain. Reserving address capacity per access, aggregation and core level reduces renumbering during expansion. Consecutive router IDs within an aggregation ring and meaningful prefixes simplify device identification, fault correlation and network inventory. All four statements reflect the intended design recommendations, while uniqueness is technically a requirement inside the applicable routing domain rather than a global prohibition across entirely isolated networks.
Technical Deep Dive:
A, B, C and D are correct. The 5G mobile bearer network includes access rings, aggregation layers, and core transport nodes with large numbers of loopback and interconnection addresses. Reserving address pools at each layer makes later growth less disruptive. Consecutive 32-bit router IDs, commonly represented in dotted- decimal notation, simplify monitoring, deployment scripts and operations on the same ring. Unique IDs within the routing domain prevent LSP/LSA or peer identity conflicts. Structured addressing can encode region and network role so engineers infer a device's approximate location and function. Router IDs are often assigned stable loopback-style identifiers independent of individual physical port state. VRP commands
`display ospf brief`, `display isis brief`, `display bgp peer`, and `display ip interface brief` help check identity and address assignment. Meaningful numbering schemes should remain sufficiently flexible to allow expansion rather than becoming overly complex or rigid.
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NEW QUESTION # 20
In the inter-AS VPN Option A network shown, CE1 and CE2 are in the same VPN. LDP and IGP are configured in both AS100 and AS200, and EBGP is configured between the ASBRs. CE1's loopback interface is assigned 10.1.1.1/32. If CE2 can ping CE1, which router assigns the inner label to CE2-to-CE1 packets forwarded by PE2?
Exhibit 45.1 - Original topology/configuration figure
Answer: B
Explanation:
Huawei Reference Verification:
In Huawei inter-AS MPLS VPN Option A, each ASBR runs customer VPN instances and exchanges VPN route information with its opposite ASBR over an ordinary inter-AS IP routing relationship. The ASBR-to- ASBR boundary resembles a CE-PE attachment rather than a single end-to-end MPLS VPN LSP. Within each AS, local MP-BGP advertisements include locally allocated VPN labels. For traffic traveling from CE2 in AS200 toward CE1 in AS100, ASBR2 advertises the CE1 destination route to PE2 using the VPN label allocated by ASBR2. Therefore ASBR2 supplies PE2's inner VPN label.
Technical Deep Dive:
B is correct. CE1 originates route 10.1.1.1/32, which PE1 learns and advertises through VPNv4 toward ASBR1 in AS100. In Option A, ASBR1 exchanges the corresponding ordinary IP route across the inter-AS VPN attachment to ASBR2. ASBR2 then advertises it to PE2 in AS200 as a labeled VPNv4 route and allocates its local VPN label. PE2 pushes this VPN label as the inner label and, where necessary, a public transport label outside it. P2 handles the transport forwarding, while ASBR2 interprets the local VPN context and forwards the packet across the AS boundary. The labels used in AS100 and AS200 need not be the same.
The defining principle of Option A is that VPN state and inter-AS connectivity terminate on both ASBRs, avoiding one continuous end-to-end VPN label stack.
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NEW QUESTION # 21
Which vBRAS communication channel is used to carry forwarding-control data sent from the vBRAS-CP to the vBRAS-UP?
Answer: D
Explanation:
Huawei Reference Verification:
Huawei's CUPS design separates communication interfaces between vBRAS-CP and vBRAS-UP into protocol, control, and management functions. The control channel sends subscriber service and forwarding entries from the control-plane system to the user-plane device and supports user-plane event reporting.
Subscriber access signaling, such as PPPoE and IPoE messages requiring central processing, uses the protocol channel. Management operations and configuration queries use management-plane interfaces and protocols such as NETCONF. Once authentication succeeds, the CP distributes the forwarding rules needed for the UP to process traffic. The channel transporting those forwarding-control entries is the control channel.
Technical Deep Dive:
D is correct because the control channel exists specifically to program the distributed forwarding plane. The vBRAS-CP coordinates user sessions, authentication, address allocation, accounting, policy, and UP resource assignment. The vBRAS-UP terminates access connectivity, enforces forwarding and QoS policy, maintains subscriber counters, and handles the network-side transport functions. During PPPoE session setup, protocol messages reach the CP through the protocol channel. After the CP decides the applicable services, it sends session state and forwarding entries to the UP over the control channel, commonly associated with CUSP.
Management functions such as querying configuration or delivering equipment settings are distinct and can use NETCONF. Supported UP forwarding ASICs apply the installed user state without hairpinning ordinary traffic through the CP. This architecture permits centralized subscriber management together with distributed, scalable forwarding capacity.
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NEW QUESTION # 22
During path computation, when multiple paths have the same metric, CSPF chooses one using tie-breaking policies. Which of the following is not an available tie-breaking policy?
Answer: A
Explanation:
Huawei Reference Verification:
Huawei MPLS TE documentation describes three CSPF tie-breaking selections for candidate paths having equal applicable metrics: most-fill, least-fill, and random. The fill-based strategies compare utilized versus reservable link bandwidth, while random selection chooses among equivalent candidate paths without using the utilization ratio. A ratio comparing the cost of an individual link with the cumulative cost of the entire path is not a defined CSPF tie-breaking policy. Therefore C is the unsupported choice.
Technical Deep Dive:
C is correct. CSPF first prunes paths that violate configured TE constraints, such as bandwidth reservation and affinity, and then computes shortest eligible paths. When multiple paths have equal cost, the tie-breaking policy selects among them. Huawei's supported modes include `most-fill`, `least-fill`, and `random`. The most- fill and least-fill mechanisms use relevant bandwidth utilization proportions; random allows non-deterministic selection among equal candidates. Option C introduces a ratio of individual-link cost to total path cost, which is not a tie-breaking option. Link metrics have already informed the primary shortest-path calculation. A representative configuration is `mpls`, followed by `mpls te tie-breaking least-fill` in the applicable view; syntax and semantics should be checked for the software version. Understanding the boundary between constraint filtering, SPF metric computation, and equal-cost tie-breaking prevents confusion in path- engineering questions.
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NEW QUESTION # 23
In the inter-AS VPN Option B network shown, Site1 and Site2 can communicate. CE1 has a route to 10.1.1.1
/24, and CE2 has learned that route. PE1, ASBR1, and ASBR2 assign VPN labels 15360, 15361, and 15362, respectively, to the route. In addition, PE1 and ASBR2 assign public-network label 3 to their own loopback interface addresses. For packets sent from CE2 to 10.1.1.1, which label pushed by PE2 is the innermost label?
Exhibit 46.1 - Original topology/configuration figure
Answer: D
Explanation:
Huawei Reference Verification:
Huawei inter-AS MPLS VPN Option B uses MP-EBGP labeled VPN route exchange between ASBRs. As VPN routes are readvertised through the inter-AS boundary, each ASBR may allocate its own VPN label. A local PE uses the VPN label advertised by the BGP next hop from which it learned the route. In the provided scenario ASBR2 allocates label 15362 for the destination and advertises it to PE2. Hence the innermost VPN label pushed by PE2 is 15362; the other labels relate to the remote PE and the preceding ASBR, while label 3 denotes implicit null transport behavior.
Technical Deep Dive:
A is correct. The VPN route to 10.1.1.1/24 is originated at PE1 in AS1, propagated through ASBR1, exchanged with ASBR2 in AS2, and finally advertised to PE2. PE1 allocates VPN label 15360, ASBR1
15361 and ASBR2 15362. PE2's immediate BGP next hop for the VPN route is ASBR2, so it pushes VPN label 15362 as the innermost label. A separate transport label may be pushed outside the VPN label to reach ASBR2. Label value 3 is MPLS implicit null: it is normally advertised to request penultimate-hop popping rather than appearing on the wire as an actual stacked label. In Option B, border routers terminate or swap labeled VPN forwarding contexts across the AS boundary; labels do not remain unchanged from the originating PE across every border.
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NEW QUESTION # 24
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