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| Section | Weight | Objectives |
|---|---|---|
| Network Automation and SDN | 5% | - Automation Technologies
|
| Network Reliability and Protection | 7% | - High Availability Design
|
| Network Operation and Maintenance | 5% | - Monitoring and Troubleshooting
|
| IPv6 Technologies | 8% | - IPv6 Deployment
|
| IGP Advanced Technologies | 15% | - OSPF and IS-IS Advanced Features
|
| Network Service Technologies | 10% | - Carrier Services
|
| BGP Advanced Technologies | 20% | - Carrier-Grade BGP
|
| MPLS and Segment Routing | 20% | - Carrier Transport Technologies
|
| Carrier IP Network Architecture | 10% | - Carrier Network Evolution
|
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NEW QUESTION # 58
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 # 59
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: C
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 # 60
Which of the following statements is incorrect about address planning for an IP core network?
Answer: B
Explanation:
Huawei Reference Verification:
Huawei's backbone routing design emphasizes aggregate reachability, consistent address blocks, and controlled routing-table size. Route aggregation advertises a summary prefix instead of numerous more- specific prefixes and benefits from hierarchical, consecutive address allocation. Capacity reservations at each network layer prevent disruptive renumbering as access and backbone infrastructure grows. Choosing private IPv4 addresses for interconnections solely to conserve address space can create overlaps and complications when carrier domains are interconnected. This supports C as the intended incorrect recommendation, while recognizing that private addressing can still be legitimate in a properly isolated routing domain.
Technical Deep Dive:
C is the intended incorrect statement. Carrier backbone addressing must enable unique infrastructure identification, predictable expansion, route summarization, and efficient troubleshooting. Reserving address blocks for planned growth supports new links, loopbacks and router additions (A). Consecutive assignments within regional and hierarchical address blocks support maintenance and aggregate advertisements (B).
Aggregation reduces protocol processing and the number of forwarding entries when summarization boundaries are properly positioned (D). Private RFC 1918 addresses are not categorically forbidden on internal point-to-point links; they can be appropriate when the operator controls the entire routing domain.
However, overlaps and external interconnection requirements complicate indiscriminate use, so conserving public addresses alone is not a sufficient planning rule. Engineers should validate address allocations with
`display ip interface brief`, `display ip routing-table`, and `display ip routing-table statistics`. On forwarding hardware, aggregation can reduce FIB consumption but must not hide needed individual reachability.
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NEW QUESTION # 61
The new metro network is built with modular, standardized components. It is designed for fixed-mobile convergence (FMC) and cloud-network integration requirements, and it enables flexible network expansion, rapid service provisioning, and network intelligence.
Answer: A
Explanation:
Huawei Reference Verification:
Huawei's official CloudMetro solution architecture describes a metropolitan network built around a Network Cloud Engine (NCE) and an underlying bearer infrastructure capable of providing differentiated end-to-end network services. The design separates functional modules, cloud operating systems, and physical forwarding resources into independently manageable layers. Service management and network-resource control are centralized, while modular network functions can be orchestrated according to subscriber and application requirements. This approach enables flexible resource scheduling, automated provisioning, simplified service deployment, and more efficient operations and maintenance. These capabilities substantiate the statement that the new metro network supports flexible expansion, fixed-mobile convergence, cloud-network integration, and intelligent service management.
Technical Deep Dive:
The statement is TRUE because modern carrier metro networks are evolving from device-centric architectures to service-oriented and programmable transport infrastructures. Traditional metro designs often combine subscriber management, service processing, and forwarding in individual physical devices, creating complexity when expanding capacity or adding services. CloudMetro addresses these limitations using functional modularization, control and forwarding separation, and centralized service orchestration. Fixed- mobile convergence enables residential broadband, enterprise VPNs, and mobile backhaul to share common transport resources while maintaining separate VPN and QoS policies. Cloud-network integration supports coordinated allocation of compute, storage, and connectivity. Rather than manually configuring each device, network functions and connectivity can be provisioned through centralized policies. On supported NetEngine platforms, forwarding processors and ASICs perform IP lookups, MPLS label operations, ACL matching, classification, and QoS scheduling. Combining modularity, high-performance hardware forwarding, and centralized service control provides rapid service activation, predictable scaling, and lower operational complexity.
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NEW QUESTION # 62
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: C
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 # 63
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