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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Cloud Bearer Network | 8% | - Cloud service bearer requirements - Cloud interconnection architecture - DC interconnect technologies |
| Topic 2: Automatic O&M | 2% | - Monitoring and analysis - Fault management |
| Topic 3: VPN Technologies | 15% | - EVPN and VXLAN - VPN deployment and troubleshooting - MPLS L3VPN |
| Topic 4: Advanced Routing Protocols | 15% | - IS-IS advanced features - BGP and MP-BGP - OSPF advanced features - Route control and fast convergence |
| Topic 5: Multicast Protocols | 6% | - MSDP and anycast RP - Multicast QoS - PIM-SM/SSM |
| Topic 6: Backbone Network Planning | 8% | - Capacity and traffic planning - Architecture design - Scalability design |
| Topic 7: Network Orchestration & Automation | 2% | - iMaster NCE overview - SDN and controller architecture |
| Topic 8: Tunnel Technologies | 15% | - SR-MPLS and SRv6 - TE and traffic engineering - MPLS fundamentals |
| Topic 9: High Reliability | 8% | - Fault detection and recovery - Network redundancy mechanisms - Fast protection switching |
| Topic 10: IP Mobile Backhaul | 10% | - Service isolation and QoS - Synchronization and timing - 5G/4G backhaul architecture |
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NEW QUESTION # 57
In the ONAP framework, which of the following closed-loop automation processes is used to respond to changing network and service conditions?
Answer: C
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 # 58
The underlay layer of a telco cloud network can use a Layer 3 routing protocol, such as OSPF, IS-IS, or BGP, to provide IP connectivity between spine and leaf nodes.
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's underlay/overlay architecture identifies the underlay as the physical network carrying overlay traffic. Routing protocols provide IP reachability between spine, leaf, and VTEP interfaces. The underlay can run OSPF or IS-IS as link-state protocols or BGP as a routed IP-fabric control plane. These distribute the reachable infrastructure networks and loopback addresses required for EVPN VXLAN tunnel operation. The overlay then supplies logical tenant/service connectivity while relying on the underlay to deliver encapsulated packets. This directly supports the statement that OSPF, IS-IS, or BGP can provide the spine-leaf Layer 3 underlay.
Technical Deep Dive:
A is TRUE. A routed spine-leaf fabric requires IP connectivity between infrastructure nodes and VXLAN tunnel endpoints. OSPF exchanges LSAs and calculates SPF paths. IS-IS performs link-state routing using LSPs and is commonly deployed in carrier networks. EBGP can provide a scalable routed leaf-to-spine design without extending one large IGP everywhere. When VXLAN is used, VTEP loopback addresses must resolve through an underlay route; an EVPN service route is unusable if its VTEP next hop cannot be reached. Equal- cost routes across multiple spines allow ECMP load distribution. The controller or routing processes compute network reachability, while the forwarding ASIC consults the installed FIB and implements the chosen next- hop/tunnel operations. Huawei VRP commands `display ospf peer`, `display isis peer`, `display bgp peer`,
`display ip routing-table`, and `display fib` establish whether underlay adjacency, reachability and forwarding state are healthy.
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NEW QUESTION # 59
On the HoVPN illustrated, which of the following statements about the network are correct?
Exhibit 49.1 - Original topology/configuration figure
Select all that apply.
Answer: B,C,D
Explanation:
Huawei Reference Verification:
Huawei Hierarchy of VPN (HoVPN) divides service roles between an Underlayer PE, a Superstratum PE, and a Network PE. The UPE handles customer attachment and can use a default VPN route advertised by the SPE instead of hosting all remote VPN prefixes. The SPE advertises itself as next hop toward the UPE and learns remote service routes from the NPE with the NPE as next hop. The SPE also allocates local labels when advertising VPN routes across hierarchical boundaries, so the labels used on the UPE-SPE and SPE-NPE segments do not necessarily match. Accordingly B, C and D are correct.
Technical Deep Dive:
B, C and D are correct. HoVPN distributes provider-edge service processing to improve scalability in large access and aggregation networks. The UPE attaches customer traffic and can have smaller VPN routing tables. The SPE maintains fuller VPN information, advertises a default/summary route to the UPE and acts as its next hop. Toward the backbone, the SPE learns VPNv4 routes from the NPE, making the NPE the next hop for those routes. The SPE can reallocate or rewrite VPN labels as it advertises routes between hierarchy levels, so option A is incorrect. At forwarding time the SPE may terminate one hierarchical VPN context and apply a new label stack for the next network segment. This approach reduces memory and control-plane requirements on access PEs while retaining large VPN service scale. The figure's UPE-SPE and SPE-NPE arrows illustrate the asymmetric route distribution central to the answer.
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NEW QUESTION # 60
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 # 61
The system IDs for the same IS-IS device in separate processes can be identical.
Answer: A
Explanation:
Huawei Reference Verification:
Huawei IS-IS multi-process operation keeps separate link-state databases, neighbor state, and route calculations for distinct routing-process instances. IS-IS system IDs must be unique among nodes within the same applicable routing domain to avoid conflicting LSP identities. However, using the same system ID in independent IS-IS processes on one router is permissible when their associated routing instances do not collide. The process number distinguishes the local protocol instance; the system ID identifies the device within the relevant IS-IS domain. Accordingly the statement is true.
Technical Deep Dive:
A is TRUE. An IS-IS NET contains an area portion, a six-byte system ID, and an N-selector, typically 00. For example, 49.0001.0000.0000.0001.00 contains system ID 0000.0000.0001. Router identities must be unique within a shared LSDB because duplicate system IDs cause LSP collisions and unstable topology representation. A device can nevertheless run multiple independent IS-IS processes with separate interfaces and databases. Reusing the system ID across those distinct processes does not inherently violate the uniqueness requirement as long as each routing domain remains unique internally. This distinction is between the globally configured value on the physical device and its meaning inside a protocol domain. On VRP,
`display isis brief`, `display isis peer` and `display isis lsdb` allow engineers to check process, adjacency and LSP state.
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NEW QUESTION # 62
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