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Huawei H12-821_V1.0（HCIP-Datacom-Core Technology V1.0）認定試験は、コアデータ通信技術における専門知識を証明したいITプロフェッショナルを対象に設計されています。この認定は、データコムネットワークの設計、実装、トラブルシューティングにおける候補者の知識とスキルを認定します。HCIP-Datacom-Core Technology V1.0認定は、データ通信分野でキャリアを進めたい人に適しています。
華為H12-821_V1.0試験は、通信機器およびサービスの提供でグローバルリーダーである華為によって開発されました。この試験に合格することで、候補者の知識と技能が認定され、データコムネットワーキング技術分野の専門家となります。この試験は、華為の認定を取得してキャリアの見通しを向上させたい個人に適しています。さらに、この認定を持つ個人を雇用することで、組織は華為の製品とソリューションに深い理解を持っているため、労働力に付加価値をもたらすことができます。
Huawei H12-821_V1.0：HCIP-Datacom-Core Technology V1.0は、Huaweiのコアネットワークのデータ通信コンポーネントを計画、実装、および構成するために必要な知識とスキルをテストする試験です。この認定試験は、デプロイとHuaweiのデータ通信製品およびソリューションの管理を担当するITプロフェッショナルを対象としています。この試験は、データコムネットワーキング技術、IPルーティング技術、MPLS VPN技術、マルチキャスト技術、およびQoS技術を含む幅広いトピックをカバーしています。
質問 # 21
Which of the following statements regarding OSPF multi-instance is false?
- A. The OSPF process IDs must be the same when OSPF neighbor relationships are established between different routers.
- B. An interface of a router belongs to only a certain OSPF process.
- C. Route exchange between different OSPF processes is similar to route exchange between different routing protocols.
- D. Multiple OSPF processes can run on the same router, and they are independent of each other.
正解：A
解説：
OSPF process IDs are locally significant and do not need to match between routers to form neighbor relationships. The other statements correctly describe the behavior of OSPF multi-instances, making Option C false .
質問 # 22
Regarding the route-policy set-cost configuration below, which of the following statements is true?
- A. All the routes that are not permitted by node 10 will be denied.
- B. The route 11.1.0.0/16 will continue to match node 20 after permitted by node 10, and (he final cost is set to 200.
- C. The cost of all routes is set to 200.
- D. The route 11.1.0.0/16 is permitted by node 10, and its tost Is set to 300.
正解：D
解説：
The route-policy configuration specifies that node 10 matches the IP prefix 11.1.0.0/16 and applies a cost of
300 to this route. Once a route matches a node, it is no longer processed by subsequent nodes, making option D incorrect. Option B is also incorrect because only specific matching routes have their costs changed .
質問 # 23
Based on IGMP snooping, IGMP snooping proxy enables a switch to act as a substitute for an upstream Layer
3 device to send IGMP Query messages to downstream hosts, and also to act as a substitute for downstream hosts to send IGMP Report/Leave messages to an upstream device. As such, this function conserves bandwidth between the upstream device and the local device.
- A. FALSE
- B. TRUE
正解：B
解説：
GMP Snooping Proxy
* IGMP snooping proxy allows the switch to substitute for upstream Layer 3 devices and downstream hosts, reducing unnecessary bandwidth consumption by consolidating IGMP messages.
HCIP-Datacom-Core Reference
* The IGMP snooping proxy functionality is described in multicast optimization and IGMP configuration chapters
質問 # 24
When receiving a packet that does not match any session table entry, the firewall discards the packet to prevent external attacks and ensure internal information security.
- A. FALSE
- B. TRUE
正解：B
解説：
When a Huawei firewall receives a packet that does not match any existing session table entry, it discards the packet. This is part of the default firewall policy, which ensures that unrecognized traffic is treated as a potential security risk and blocked. This behavior is vital for preventing unauthorized access and mitigating external attacks. The feature aligns with Huawei's default security strategies as detailed in their firewall operation manuals .
質問 # 25
As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode).
Which AC will the connect to?
- A. None
- B. AC1
- C. Random access
- D. AC2
正解：A
質問 # 26
Which of the following parameters are not mandatory during the configuration of a BGP peer?
- A. Peer IP address
- B. password
- C. description
- D. as-number
正解：B、C
解説：
The mandatory parameters for BGP peer configuration are the peer IP address (peer ip-address) and AS number (as-number). A password is optional for MD5 authentication, and a description is an optional comment for reference. These are not required for establishing the peer relationship .
質問 # 27
This configuration is part of RTA configuration. Which of the following statements regarding the configuration are true?
[RTA] ospf 100
[RTA-ospf-100]silent-interface GigabitEthernet 1/0/0
- A. This interface cannot send Hello packets.
- B. Direct routes of GigabitEthernet 1/0/0 can still be advertised.
- C. RTA cannot establish a neighbor relationship with the neighbor that this interface is directly connected to.
- D. GigabitEthernet 1/0/0 is prohibited from sending OSPF packets.
正解：A、C、D
解説：
The silent-interface command disables the sending of OSPF packets, including Hello packets, on the specified interface, which prevents the establishment of OSPF neighbor relationships. However, the interface can still advertise directly connected routes through other interfaces, making Option C incorrect .
質問 # 28
Which of the following scenarios is not suitable for deploying interface PBR?
- A. A core switch needs to forward traffic between the intranet and extranet to an AC device that connects to the core switch in off-path mode.
- B. A device needs to modify the next-hop IP address for locally originated traffic.
- C. A core switch needs to forward the traffic between the intranet and extranet to a security detection device that connects to the core switch in off-path mode.
- D. On an enterprise network with multiple ISP outbound interfaces, each internal network segment accesses the Internet through a particular ISP outbound interface.
正解：B
解説：
Policy-Based Routing (PBR) on interfaces is used to forward traffic based on specific policies rather than the routing table. However, PBR is not suitable for modifying the next-hop of locally originated traffic. Other scenarios listed are typical use cases for interface PBR .
質問 # 29
Both MQC and PBR can be applied on device interfaces to filter received and sent packets or control packet forwarding paths.
- A. FALSE
- B. TRUE
正解：B
解説：
MQC and PBR
* MQC (Modular QoS Command-Line Interface): Applied to interfaces for classifying and controlling traffic.
* PBR (Policy-Based Routing): Used to influence packet forwarding based on policies rather than traditional routing tables.
* Both MQC and PBR can be configured on device interfaces to filter incoming/outgoing packets or control their forwarding paths.
HCIP-Datacom-Core Reference
* The use of MQC and PBR on device interfaces is elaborated in the QoS and routing control chapters.
質問 # 30
To inject IGP routes into BGP routes, you can only use the network command.
- A. TRUE
- B. FALSE
正解：B
解説：
IGP routes can be injected into BGP using multiple methods, not just the network command. The import-route command can also be used to redistribute IGP routes into BGP. The network command requires the route to exist in the routing table, while import-route allows direct redistribution .
質問 # 31
In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.
- A. FLASE
- B. TRUE
正解：A
解説：
Inter-area route calculation in OSPF involves Summary LSAs (Type 3) for summarizing routes across areas and ASBR Summary LSAs (Type 4) for locating ASBRs. While Router LSAs and Network LSAs describe the internal structure of an area, they do not directly participate in inter-area route calculation. Thus, the statement that only Router, Network, and Summary LSAs are involved is false .
質問 # 32
OSPF supports area authentication and interface authentication. If both authentication modes are configured, Interface authentication takes preference over area authentication.
- A. FALSE
- B. TRUE
正解：B
解説：
OSPF supports both area-level and interface-level authentication. When both are configured, interface authentication takes precedence over area authentication. This hierarchy ensures that specific interface-level configurations override the broader area-level settings when applicable .
質問 # 33
Which of the following LSAs are advertised only within a single area?
- A. Network LSA
- B. AS External LSA
- C. Summary LSA
- D. Router LSA
正解：A、D
解説：
Router LSAs (Type 1) and Network LSAs (Type 2) are advertised only within a single OSPF area, as they describe the topology within the area. In contrast, Summary LSAs (Type 3) and AS External LSAs (Type 5) are used for inter-area and external routing, respectively .
質問 # 34
Compress the 2001:0DBB:B8:0000:C030:0000:0000:09A0:CDEF address.___________(if the answer contains letters, capitalize them.)
正解：
解説：
pending
質問 # 35
Which of the following statements regarding an IP prefix are true?
- A. An IP prefix filter is used to filter IP address prefixes and can match an IP prefix number and a prefix length at the same time.
- B. An IP prefix filter can be used to filter data packets.
- C. An IP prefix filter cannot be used to filter data packets.
- D. An IP prefix filter is used to filter IP address prefixes and cannot match an IP prefix number and a prefix length at the same time.
正解：A
解説：
An IP prefix filter is designed to match both the IP address and its prefix length, making it suitable for filtering routing information rather than data packets. Options A and D are incorrect because IP prefix filters do not work directly on data packets, and they can match both prefix numbers and lengths .
質問 # 36
Which of the following statements regarding DR/BDR are false?
- A. In a broadcast network, DR and BDR must be elected. A broadcast network without a DR or BDR cannot operate normally.
- B. DR others listen on the network address 224.0.0.6.
- C. DR others listen on the multicast address 224.0.0.5.
- D. All DR others establish neighbor relationships with DR and BDR only.
正解：B
解説：
In OSPF, DR and BDR listen on the multicast address 224.0.0.6, while all OSPF routers (including DR others) listen on 224.0.0.5. DR others establish neighbor relationships with DR and BDR, but they do not listen on 224.0.0.6. This makes Option D incorrect, as only DR and BDR use 224.0.0.6 .
質問 # 37
Which of the following statements regarding OSPF is true?
- A. OSPF performs LSDB update every 30 minutes.
- B. OSPF uses the Bellman-Ford algorithm, and each router independently runs this algorithm.
- C. OSPF floods a LSU packet at an interval of 5s.
- D. OSPF does not have an acknowledgement mechanism. Therefore, OSPF relies on the upper-layer protocol, TCP, for acknowledgement.
正解：A
解説：
OSPF routers refresh and flood LSAs in the Link-State Database (LSDB) every 30 minutes by default to maintain topology consistency. OSPF does not rely on TCP; it uses its own acknowledgment mechanism. It also uses the Dijkstra algorithm, not Bellman-Ford. The flooding interval for LSU packets is shorter, typically
5 seconds .
質問 # 38
Which of the following configurations are not mandatory when an administrator configures VRRP?
- A. Virtual router priority
- B. Preemption delay
- C. Preemption mode
- D. Virtual IP address
正解：D
質問 # 39
In an OSPF routing domain, two routers must be specified as one DR and one BDR in a broadcast or NBMA network with at least two routers.
- A. FALSE
- B. TRUE
正解：B
解説：
In an OSPF broadcast or NBMA network with at least two routers, one router must act as the DR (Designated Router), and another as the BDR (Backup Designated Router) to ensure efficient communication and reduce the number of adjacencies. This is a requirement for OSPF operation in such network types .
質問 # 40
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