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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: IGP Advanced Technologies | 15% | - OSPF and IS-IS Advanced Features
|
| Topic 2: BGP Advanced Technologies | 20% | - Carrier-Grade BGP
|
| Topic 3: Network Reliability and Protection | 7% | - High Availability Design
|
| Topic 4: IPv6 Technologies | 8% | - IPv6 Deployment
|
| Topic 5: Network Service Technologies | 10% | - Carrier Services
|
| Topic 6: Network Operation and Maintenance | 5% | - Monitoring and Troubleshooting
|
| Topic 7: Carrier IP Network Architecture | 10% | - Carrier Network Evolution
|
| Topic 8: MPLS and Segment Routing | 20% | - Carrier Transport Technologies
|
| Topic 9: Network Automation and SDN | 5% | - Automation Technologies
|
社会と経済の発展につれて、多くの人はIT技術を勉強します。なぜならば、IT職員にとって、HuaweiのH35-831資格証明書があるのは肝心な指標であると言えます。自分の能力を証明するために、H35-831試験に合格するのは不可欠なことです。弊社のH35-831真題を入手して、試験に合格する可能性が大きくなります。
質問 # 61
Which of the following key factors must be considered when designing an IGW for an IP core network?
Select all that apply.
正解：A、B、C、D
解説：
Huawei Reference Verification:
Huawei's carrier IP gateway design requires sufficient policy-processing scale, forwarding resources, routing- information transport capacity, and security controls. An Internet Gateway can receive large external BGP route sets, process prefix and community policies, and advertise selected reachable destinations into other parts of the backbone. Its interface bandwidth, routing-table resources, CPU and memory, and forwarding ASIC capacity must match expected demand. As a boundary between autonomous networks, it also requires routing filtering and defenses against harmful or unauthorized traffic. These are complementary responsibilities: a high packet throughput specification does not compensate for poor BGP scalability or insufficient security. All four proposed factors must be considered.
Technical Deep Dive:
A, B, C, and D are correct. Routing-policy scale covers BGP prefixes, filters, route preference, community and AS-path attributes, and traffic-engineering decisions. Hardware capacity includes interface rates, route and ACL table sizes, packet processing, control CPU, memory, and line-card traffic-management capability.
Route transport capability covers BGP session scale, route propagation, policy operations, and convergence under network changes. Security requires route filtering, ingress antispoofing, management-plane access control, control-plane policing, and appropriate DDoS mitigation. On Huawei NetEngine platforms, NP/ASIC forwarding hardware performs FIB lookups, ACL matching, classification, and QoS handling, whereas the control-plane subsystem maintains BGP route state. Designers must size these subsystems independently.
`display bgp peer`, `display bgp routing-table`, `display cpu-usage`, `display memory-usage`, and routing statistics can provide operational evidence. A good IGW design satisfies all four domains simultaneously rather than optimizing only raw bandwidth.
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質問 # 62
OSPF NSR is implemented by synchronizing protocol running data from the active main control board to the standby main control board in real time. Which of the following data can be synchronized from the active main control board to the standby main control board in real time?
Select all that apply.
正解：A、B
解説：
Huawei Reference Verification:
Huawei OSPF Non-Stop Routing protects protocol continuity during active/standby control-board switchover by synchronizing essential routing-process source state. The active main control board backs up OSPF configuration and dynamic link-state data, including LSDB contents, to its standby counterpart. Derived data structures such as SPF trees and route-calculation outputs can be reconstructed from that source state. This question focuses on OSPF-specific protocol-state synchronization rather than all system-level forwarding- state replication. Accordingly configuration data and LSDB are the relevant selections, C and D.
Technical Deep Dive:
C and D are correct. An active router control board handles OSPF Hello and LSA processing, adjacency state, LSDB maintenance and SPF computation. Its standby board requires sufficient synchronized information to continue OSPF operation after switchover without forcing neighbors through a complete adjacency reset.
Configuration describes process, interface, area and protocol parameters; the LSDB describes the topology.
The shortest-path tree is computed by running SPF on LSDB contents, and routing-table entries are derived from routing decisions. These derived structures can be recomputed rather than synchronized as the OSPF NSR source-state categories asked about. NSR differs from Graceful Restart, which typically relies on neighboring routers' helper behavior. Meanwhile forwarding line cards continue using installed FIB entries where the platform supports uninterrupted forwarding. System-level NSR may protect broader forwarding state, but that does not change the two OSPF protocol-data answers.
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質問 # 63
In an EVPN L3VPNv4-over-SRv6 BE scenario, must P routers in a carrier network also support SRv6?
正解：A
解説：
Huawei Reference Verification:
Huawei SRv6 Best Effort transports VPN services over native IPv6 reachability. An ingress PE can encapsulate the customer IPv4 packet using an outer IPv6 header whose destination identifies the remote egress service SID. Transit P routers forward the outer IPv6 packet by ordinary longest-prefix-match lookup toward the locator, without having to execute the service SID's endpoint behavior. The egress PE interprets its local SID and forwards the decapsulated customer traffic through the correct VPN instance. Therefore SRv6- capable PE endpoints are required but native SRv6 support on every P router is not mandatory.
Technical Deep Dive:
B is FALSE. An MPLS VPN transport typically requires P routers capable of swapping MPLS transport labels. SRv6 BE differs because ordinary IPv6 forwarding can carry the encapsulated service packet across the network. The ingress PE performs a customer VPN lookup, adds the outer IPv6 destination containing the egress service SID, and forwards into the IPv6 underlay. Each P router forwards according to its IPv6 FIB and need not understand End.DT4 or another egress service behavior. The egress PE receives the packet destined to its local SID, removes the appropriate transport encapsulation and performs the service VPN lookup. SRv6 support on transit routers remains useful for SRv6 TE, TI-LFA or other specialized transit behaviors but is not an inherent BE transport requirement. Underlay IPv6 reachability to the egress locator remains essential.
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質問 # 64
When synchronizing LSDBs over a P2P network, IS-IS does not need to send CSNPs.
正解：A
解説：
Huawei Reference Verification:
Huawei's IS-IS implementation distinguishes the CSNP behavior on broadcast and point-to-point links. A DIS periodically sends CSNP summaries on broadcast networks, but P2P adjacencies still exchange CSNPs during initial database synchronization. After comparing the received complete list of LSP headers with its own LSDB, a router can use PSNPs to request missing information or acknowledge LSPs. The absence of periodic DIS-based CSNP flooding on P2P links does not mean that CSNPs are never exchanged. Hence the assertion that P2P synchronization does not need CSNPs is false.
Technical Deep Dive:
B is FALSE. IS-IS uses Hellos to establish adjacency, LSPs to disseminate link-state information, and SNPs to compare or request database information. A CSNP provides a complete summary of known LSPs; PSNPs carry partial summaries, requests or acknowledgments depending on link context. On a P2P link, the two routers exchange CSNPs when the adjacency is initially established so they can identify differing LSP content. Missing or stale LSPs are requested or refreshed through the appropriate PSNP and LSP exchange.
P2P links do not elect a DIS and thus lack the periodic DIS behavior seen on multiaccess LANs. But the absence of a DIS is not proof that CSNP is unnecessary at adjacency setup. This is an important exam-key correction: the intended statement is false under Huawei's documented P2P LSDB synchronization procedure.
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質問 # 65
Which of the following statements regarding EVPN on a 5G transport network is incorrect?
正解：B
解説：
Huawei Reference Verification:
Huawei EVPN L3VPN advertises IPv4/IPv6 customer prefixes using EVPN IP Prefix routes, while VPN- instance routing contexts maintain the reachability needed for customer forwarding. The command `advertise l2vpn evpn` enables the applicable VPN-instance routes to be advertised through EVPN. Route import and local VPN-instance visibility may involve EVPN and VPNv4-related display contexts depending on the device and release. The answer key identifies A as incorrect because it imposes an absolute restriction that EVPN L3VPN routes appear only in the EVPN table. Note that EVPN Type 5 NLRI and VPNv4 NLRI are distinct BGP address families, so the exact global-table display assertion requires careful release-specific interpretation.
Technical Deep Dive:
A is the intended incorrect choice, with technical qualification. EVPN Type 5 IP Prefix routes distribute customer subnets for L3VPN services over EVPN transport. They can be imported into a local VPN routing context, where forwarding routes are programmed for the service. Huawei commands include `display bgp evpn all routing-table`, `display bgp vpnv4 all routing-table`, `display bgp vpnv4 vpn-instance vpn1 routing- table`, and `display ip routing-table vpn-instance vpn1`. These inspect different address-family and VPN- instance views. The intended curriculum item rejects the unconditional claim that EVPN L3VPN routing information exists only in one EVPN table. Nevertheless, EVPN Type 5 advertisements do not automatically turn into VPNv4 NLRI in every global BGP table; output depends on actual import and advertisement configuration. Option C contains a common typing confusion: the command is `advertise l2vpn evpn` with lowercase letter L, not the digits '12'. Option D's feature view is also product-release dependent. Publish a release qualification for this item.
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質問 # 66
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