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| Certification Vendor: | Huawei |
|---|---|
| Exam Name: | HCIE-Datacom-Carrier (Written) V1.0 |
| Exam Number: | H35-831 |
| Related Certifications: | HCIE-Datacom HCIP-Datacom |
| Certificate Validity Period: | 3 years |
| Exam Format: | Single choice questions, Multiple choice questions |
| Available Languages: | Chinese, English |
| 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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The Huawei H35-831 Exam is divided into several sections, each of which covers different aspects of data communication. These sections include network architecture and protocol design, network operation and maintenance, and network security. To pass the exam, candidates must demonstrate a deep understanding of each of these areas and be able to apply their knowledge to real-world scenarios.
Huawei H35-831 certification is an advanced-level certification that requires candidates to have a deep understanding of carrier data communication technologies and solutions. HCIE-Datacom-Carrier (Written) V1.0 certification is intended for professionals who have several years of experience in the data communication industry and wish to enhance their technical skills and knowledge. HCIE-Datacom-Carrier (Written) V1.0 certification is widely recognized by leading organizations in the data communication industry, making it a valuable credential for professionals seeking career advancement.
NEW QUESTION # 41
Which of the following statements are accurate about IS-IS LSPs?
Select all that apply.
Answer: A,B,C
Explanation:
Huawei Reference Verification:
Huawei's IS-IS fast-convergence features include LSP fast flooding, intelligent generation timers and configuration of LSP size. Fast flooding sends a bounded group of LSPs early in the processing sequence to accelerate LSDB synchronization. When topology changes repeatedly, the intelligent LSP-generation timer increases its delay only to its configured maximum, preventing uncontrolled update frequency. The allowable LSP length may be increased within the supported MTU constraints to carry more topology information. A shorter generation interval does not automatically improve network stability, because very frequent updates can increase CPU utilization and SPF churn. Accordingly A, C and D are the appropriate answers.
Technical Deep Dive:
A, C and D are correct. `flash-flood` controls quick propagation of a defined maximum number of LSPs before normal route calculation, reducing network-wide propagation delay. Option A is best worded as no more than the configured number rather than strictly less. An intelligent timer can begin with a small delay, increase during repeated changes, and stop increasing at the maximum limit; C reflects this cap. Raising an LSP's configured maximum length can permit more TLVs to be carried per LSP as the topology expands, but all participating devices and interfaces must support the resulting packet size; D is correct. B is incorrect because excessive LSP generation during flapping can destabilize routing operation, increasing update load and repeated SPF calculations. Example VRP commands: `isis 1`, `flash-flood 5`, `timer lsp-generation 1000
50 50`. Use timer values appropriate for the hardware, topological scale, and failure-convergence requirements.
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NEW QUESTION # 42
Which backup modes do vBRAS-UPs support?
Select all that apply.
Answer: A,D
Explanation:
Huawei Reference Verification:
Huawei's separated subscriber-control and user-plane architecture allows several active UPs to share standby protection resources. A carrier deployment model describes N+1 warm protection, and independent Huawei vBNG interoperability testing establishes N:1 warm backup with one standby UP protecting multiple active nodes. When an active forwarding node fails, the control plane coordinates recovery and installs the subscriber
/session and routing information required by the standby. Warm backup differs from 1:1 hot standby, in which much of the active forwarding state may be continuously replicated. The answer therefore selects the two warm-backup configurations.
Technical Deep Dive:
A and D are the intended answers. In N+1 protection, backup capacity exists in addition to the group of active resources. In N:1 warm backup a single standby protects N active user planes. The centralized vBRAS-CP monitors UP resources, coordinates selection of the recovery node and redeploys the affected subscriber information after a failure. This model optimizes spare hardware compared with dedicating a synchronized standby UP to each active UP. It may produce longer restoration times than 1:1 hot standby because forwarding entries are restored or reinstalled during failover rather than continuously synchronized.
Restoration depends on subscriber population, policy/session complexity, UP processing speed, and forwarding-table installation rate. N+1 hot and N:1 cold backup do not match the intended vBRAS-UP protection models. Support for the exact N+1 nomenclature and deployment limits must be checked against the relevant Huawei product release.
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NEW QUESTION # 43
Which of these statements is incorrect regarding SRv6 SFC?
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's SRv6 Service Function Chaining architecture distinguishes SRv6-aware functions capable of recognizing service-chain encapsulation from SRv6-unaware functions such as conventional firewalls or load balancers. An aware SF can execute or be associated with an SRv6 SID within the orchestrated chain. An unaware SF cannot independently process the required SRv6 service-chain behavior; an SRv6/SFC proxy adapts the incoming packet to the SF's expected format and restores the forwarding context afterward.
Therefore B, claiming that an unaware SF can implement the chain without an appropriate proxy, is incorrect.
Technical Deep Dive:
B is incorrect. SFC directs service traffic through a defined sequence of middleboxes or virtual network functions, such as firewall, IPS and load balancer. SRv6 uses SIDs to encode the forwarding and service behaviors of this chain. SRv6-aware functions can recognize the relevant encapsulation and participate directly. An SRv6-unaware appliance may process ordinary IPv4 or IPv6 but cannot execute the specialized SRv6 service-chain instructions; a proxy handles encapsulation, decapsulation or metadata adaptation so that the appliance can operate normally. The proxy also ensures that packets returning from the service function rejoin the intended segment list. D is correct in the intended model because aware functions can be represented by orchestratable service SIDs. C is overbroad if interpreted as saying every unaware device categorically discards every IPv6 packet, but it captures the operational limitation that the device cannot process SRv6 chain metadata unassisted.
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NEW QUESTION # 44
In an intelligent cloud-network scenario, NCE centrally computes and delivers SRv6 Policies. Which statements about the BGP-LS IPv6 design are correct?
Exhibit 15.1 - Original topology/configuration figure
Select all that apply.
Answer: A,B,C
Explanation:
Exact Extract - Huawei Training Material (Automatic SDN Network O & M, p.26):
"BGP-LS: BGP Link-state Protocol, BGP extension, which is used to summarize topology information collected by IGP and send the information to the upper-layer controller. This feature is mainly used when the controller computes paths in a centralized manner." Huawei Reference Verification:
Huawei's Automatic SDN O & M curriculum defines BGP-LS as a BGP extension that summarizes topology information collected by IGP and sends it to a controller for centralized path computation. The intelligent cloud bearer design collects access, aggregation, and core topology, including bandwidth and delay. It uses BGP-LS peering/reporting relationships from ACC through AGG and backbone reporting nodes toward iMaster NCE-IP. In contrast, policies computed by the controller are signaled through the BGP IPv6 SR Policy address family rather than BGP-LS. This distinction establishes A, B, C and excludes D in the depicted hierarchical reporting model.
Technical Deep Dive:
A, B and C are correct for the illustrated architecture. The access and aggregation layers provide IGP- distributed topology and traffic engineering data, including link state, metrics and delay. BGP-LS speakers transport relevant node, link and prefix information toward the backbone reporting devices and NCE. The controller uses this combined topology to compute SRv6 Policy segment lists meeting SLA constraints.
Option D confuses topology reporting with policy distribution: BGP-LS exports network state; BGP IPv6 SR Policy conveys policy information to the headend for traffic steering. A BGP-LS route may encode link, node or prefix attributes but does not replace the SR Policy NLRI. Separating these address families allows a controller to obtain topology information independently of its chosen path-delivery mechanism. PCEP is another technology that can assist computation and LSP management in supported deployments.
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NEW QUESTION # 45
SR and LDP interworking technology allows SR and LDP to operate together on the same network. SR and LDP networks can be interconnected through this technology to implement MPLS forwarding. To interwork with an LDP network, an SR network needs a particular device type to advertise SIDs on behalf of SR- incapable LDP devices. What is this device called?
Answer: B
Explanation:
Huawei Reference Verification:
Huawei's SR/LDP interworking design defines a mapping server as an SR-capable node that advertises Prefix- to-SID mappings on behalf of LDP nodes that cannot originate Segment Routing advertisements. A mapping client receives this information and can use the assigned SID to calculate SR paths toward destinations otherwise reachable through the LDP domain. Border or interworking routers can connect SR and LDP transport segments to provide continuity during gradual migration. The mapping server originates the advertisements; a mapping client consumes them. Therefore D is correct.
Technical Deep Dive:
D is correct. SR-MPLS distributes Prefix-SIDs through IGP extensions, whereas traditional LDP distributes label bindings using LDP sessions. An LDP-only router cannot advertise a valid SR Prefix-SID directly. The mapping server bridges this information gap by announcing a configured prefix-to-SID association for the SR- incapable node. SR-capable mapping clients learn the association and can build a label stack toward that destination. The interworking boundary performs the MPLS operations required to connect the SR and LDP forwarding segments. A representative OSPF-based Huawei configuration includes `segment-routing`,
`mapping-server prefix-sid-mapping 10.10.10.10 32 100`, and in the OSPF process `segment-routing mapping- server send` where supported. Mapping server versus mapping client is a producer/consumer distinction: the server advertises the prefix mappings, and the client receives and uses them. The feature permits phased modernization of large carrier networks without replacing all LDP devices at once.
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NEW QUESTION # 46
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