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Huawei H35-831 (HCIE-Datacom-Carrier (Written) V1.0) Certification Exam is a highly reputable and comprehensive certification program aimed at validating the skills and expertise of learners in the field of data communication and carrier networks. HCIE-Datacom-Carrier (Written) V1.0 certification exam is designed to equip learners with the necessary knowledge and skills to design, deploy, optimize, and troubleshoot data communication and carrier network solutions based on Huawei technologies.
The H35-831 Exam covers a wide range of topics related to data communication technologies, including MPLS VPN, BGP/MPLS VPN, PBB, TRILL, MPLS-TE, and more. H35-831 exam also covers carrier network technologies such as IP RAN, 5G, and cloud computing. This comprehensive exam is designed to test the knowledge and skills of IT professionals in carrier network technologies.
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Huawei H35-831 certification exam is a rigorous exam that requires extensive preparation. H35-831 exam consists of multiple-choice questions that are designed to test the candidate's knowledge and understanding of networking technologies and their application in datacom carrier networks. H35-831 Exam also includes practical scenarios that test the candidate's ability to design and implement datacom carrier networks.
NEW QUESTION # 47
Which of these statements are correct regarding IS-IS reliability parameters on a 5G transport network?
Select all that apply.
Answer: A,B,C,D
Explanation:
Huawei Reference Verification:
Huawei's 5G transport IS-IS reliability design combines intelligent SPF and LSP-generation timers with precomputed TI-LFA protection, microloop avoidance and Graceful Restart. Maximum, initial and incremental delays of 1 second, 50 milliseconds, and 50 milliseconds are a recommended convergent tuning pattern for both SPF and LSP generation in the intended solution. TI-LFA protects eligible failures locally, and microloop avoidance reduces transient forwarding loops when routers converge at different times.
Graceful Restart can preserve continuity during supported routing-control restarts. These complementary functions support all four options, provided GR is not misinterpreted as protecting against arbitrary permanent neighbor disconnection.
Technical Deep Dive:
A, B, C and D represent the intended reliability design. The intelligent SPF timer reacts rapidly to a first topology change, then increases the wait during repeated changes to control CPU load. The LSP-generation timer similarly limits excessive update flooding while maintaining rapid distribution of meaningful state changes. The representative values are 1000, 50, 50 in milliseconds. TI-LFA precomputes backup next-hop instructions and allows rapid repair when a link or protected node fails; microloop avoidance reduces short- lived loops during distributed reconvergence. IS-IS GR permits routing-state and forwarding continuity across an eligible process restart with neighbor helper behavior, but not across every physical failure. Example VRP commands are `isis 1`, `timer spf 1000 50 50`, `timer lsp-generation 1000 50 50`. Exact timer syntax and protection availability must match the device release. A proper reliability plan combines fault detection, local switching, and stable eventual convergence.
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NEW QUESTION # 48
The figure depicts an inter-AS EVPN Option B network and the EVPN configuration between ASBR2 and PE2. Which device is the next hop for the route that ASBR2 advertises to PE2?
Exhibit 54.1 - Original topology/configuration figure
Answer: D
Explanation:
Huawei Reference Verification:
Huawei's inter-AS EVPN Option B model exchanges EVPN routes across ASBRs and readvertises them to local PEs. The intended border-gateway forwarding model uses the receiving ASBR as the next hop for routes sent into its own AS, allowing local PEs to resolve remote EVPN services toward the local AS boundary. In the depicted deployment ASBR2 advertises the route toward PE2 and is the forwarding next hop under the intended Option B next-hop processing. This depends on the actual BGP next-hop rewrite or route policy:
generic IBGP re-advertisement of an EBGP-learned route does not automatically replace the next-hop attribute in every configuration.
Technical Deep Dive:
A is the intended answer. PE1 originates EVPN service reachability inside AS1. The route passes to ASBR1, crosses the inter-AS exchange to ASBR2 in AS2 and is advertised toward PE2. In Option B the ASBR boundary acts as a forwarding and service-route exchange point. The receiving ASBR can rewrite the BGP next hop to itself so local routers resolve the route through the local transport network toward that border. PE2 thus uses ASBR2 as the service route's next hop in the intended design. The spine or internal P router merely provides underlay transport; PE1 is the remote originator but not the local transport boundary. On VRP
`display bgp evpn all routing-table` reveals the received next hop and route state. For a real configuration, verify `next-hop-local` or equivalent policy because an ordinary IBGP advertisement may preserve the EBGP- learned next hop unless configured or required by the solution.
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NEW QUESTION # 49
In the network shown, RT4 and RT5 function as ASBRs and import IS-IS routes into OSPF. Only OSPF is used for interworking between RT4 and RT5. The link costs are shown in the figure. The key configurations of RT4 and RT5 are as follows:
Exhibit 36.1 - Original topology/configuration figure
Exhibit 36.2 - Original topology/configuration figure
Answer: C
Explanation:
Huawei Reference Verification:
Huawei OSPF External Type 2 route selection considers the external metric first; when E2 metrics are equal, internal cost toward the advertising ASBR serves as an additional comparison. RT4 and RT5 import the IS-IS destination as OSPF Type 2 external routes with the explicitly configured external metric of 10. The illustrated OSPF paths to RT4 and RT5 have equal internal cost from RT1. Therefore RT1 installs two equal- cost forwarding paths to 6.6.6.6. The differing IS-IS link costs to RT6 do not override the imported OSPF Type 2 metric. Thus B is correct.
Technical Deep Dive:
B is correct. RT4 and RT5 are ASBRs because they inject routes learned in IS-IS into OSPF. Both use
`import-route isis 1 cost 10 type 2`. As a result the advertised E2 cost for 6.6.6.6 is 10 from either ASBR. RT1 can reach RT4 through RT2 and RT5 through RT3, and the illustrated internal OSPF costs for those alternatives are equal. The two paths therefore qualify for ECMP, unlike a single preferred next hop. The original IS-IS costs (20 on the RT4 side and 10 on RT5) are internal to the source routing domain; they are not the metric used after the explicit E2 import cost is assigned. Huawei commands `display ospf routing`,
`display ospf lsdb ase` and `display ip routing-table 6.6.6.6` help confirm the route type and next hops. ASIC forwarding can distribute traffic across installed ECMP entries.
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NEW QUESTION # 50
In the transport network shown, two-level RRs are deployed, and RTA has the directly connected network segment 10.1.1.0/30. Which of the following statements about the BGP deployment solution are incorrect?
Exhibit 28.1 - Original topology/configuration figure
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's hierarchical BGP route-reflector deployment lets a lower-level RR be a client of an RR at a higher level, extending route distribution without requiring client-to-client full-mesh sessions. Redundant RRs serving the same cluster can use the same cluster ID. Ordinary edge clients can peer with their selected Level-
1 RRs and learn reflected routes without peering with one another. RRs on the same tier do not have to be configured as each other's route-reflector clients; non-client IBGP relationships or other hierarchy rules can supply the required connectivity. Therefore the assertion that same-level RRs must be each other's clients is incorrect.
Technical Deep Dive:
C is incorrect. In the illustrated two-level design, RTA and RTB each peer with the redundant Level-1 RRs; Level-2 RRs operate as clients of the Level-1 layer to receive the needed routes. A direct IBGP adjacency between RTA and RTB is not mandatory because both can learn eligible routes through their RRs. RRs in a shared redundancy cluster may use the same cluster identifier for consistent loop detection, but this is not a universal rule across unrelated clusters. Route-reflection client relationships are directional configuration properties: not all RRs at one level need to treat their peer RRs as clients. RRs may establish ordinary non- client peering where appropriate. The BGP Originator ID and Cluster List attributes prevent reflection loops as routes pass through the hierarchy. Route deployment must also consider route visibility and path diversity; making every same-tier RR a mutual client is neither necessary nor a normal scaling principle.
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NEW QUESTION # 51
In the ONAP framework, which of the following closed-loop automation processes is used to respond to changing network and service conditions?
Answer: B
Explanation:
Exact Extract - Huawei Training Material (Network Orchestration Technologies Overview, p.34):
"Closed-loop automation: responds to network or service conditions without intervention through design, creation, collection, analysis, detection, release, and response." Huawei Reference Verification:
The Huawei ONAP module defines a closed-loop sequence beginning with design-time modeling and creation, followed by collection, analysis, detection, publication and response. ONAP uses SDC for service design and DCAE for operational data gathering and analysis. Collected telemetry and events are analyzed, resulting abnormalities or policy conditions are detected, the outcome is published to policy/orchestration components, and an authorized controller executes remediation. The curriculum diagram explicitly places Analysis before Detect. Thus the exact intended sequence is Design > Create > Collect > Analyze > Detect > Publish > Respond, corresponding to B.
Technical Deep Dive:
B is correct. ONAP separates design-time and run-time actions. During Design, network resources, service templates and closed-loop policies are defined. Create instantiates the specified service and its required network functions. Collect gathers service alarms, metrics and events, with DCAE providing collection infrastructure. Analyze evaluates observations for trends and anomalies; Detect identifies actionable conditions according to rules and policies. Publish distributes the relevant findings to policy and orchestration components, and Respond triggers measures such as service reconfiguration, VNF recovery or path adjustment. The exact order is important: analytical processing precedes identifying and publishing actionable conditions in this curriculum description. An incomplete answer omitting Design, such as A, cannot describe the full lifecycle; C and D change the expected analytic order. Closed-loop operation is designed to reduce the delay between fault observation and corrective action while preserving policy-based control.
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NEW QUESTION # 52
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