[2024年04月28日]H12-921_V1.0試験ブレーン問題集で学習注釈と理論
合格させるHuawei H12-921_V1.0テスト練習テスト問題試験問題集
Huawei H12-921_V1.0（HCIE-DATA Center Network（Writde）v1.0）認定試験は、データセンターネットワークテクノロジーのスキルと知識の開発に関心のあるIT専門家向けに設計されたグローバルに認められた認定プログラムです。この認定試験は、IT業界のキャリアの見通しを強化し、データセンターネットワーキングの認定専門家になりたいと考えている個人に最適です。
Huawei H12-921_V1.0認定試験は、複数選択の質問で構成される筆記試験であり、英語で実施されます。この試験では、ネットワークアーキテクチャ、仮想化、ストレージ、セキュリティ、自動化など、データセンターネットワークテクノロジーに関連する幅広いトピックをカバーしています。この試験では、Huaweiのデータセンターネットワーク製品とソリューションに関する候補者の知識もテストしています。
質問 # 67
In an iNOF network, which of the following information can be transmitted in an iNOF message?
- A. Layer 2 VNI information
- B. Domain configuration information
- C. Host dynamics
- D. Interface Error-Down information
正解：B、C、D
解説：
Parsing: iNOF packets are TCP-encapsulated packets with TCP port numbers ranging from 10000 to 57999 and 19516 by default , which contains key iNOF information in the Data field of TCP packets. The client can send key iNOF information to the reflector through the iNOF packet, and the reflector summarizes it and then sends it to other clients. Through iNOF messages The following types of information can be transmitted: Connection information: The iNOF reflector and the client need to exchange iNOF packets to establish an iNOF connection, similar to TCP connection. Domain configuration information: In the iNOF system, the device can manage the connected host through the zone, and after the iNOF domain configuration is completed on the iNOF reflector, it will pass through the iNOF The packet sends the domain configuration information to each client. Host dynamic information: When a new host connects to the client or leaves the client, the host will actively send LLDP packets to the client, and the LLDP will be recorded in the packet The change of neighbor information allows other devices in the iNOF system to perceive the host dynamic information. Interface Error-Down Information: Interface Error-Down is triggered when the iNOF device is triggered due to a PFC deadlock or a CRC error packet that reaches the alarm threshold After that, the iNOF packet will carry the interface Error-Down information, so that other devices in the iNOF system can quickly sense it and adjust the path information in time. *After the iNOF system is established, all devices in the system can perceive the changes of the access host at the first time, so that the information can be fed back to each intelligent lossless network function, and the relevant configuration can be intelligently adjusted, so that the network can finally achieve low latency, no packet loss, and high throughput performance.
質問 # 68
Network-wide intelligent O&M is a feature of Huawei's CloudFabric solution, which provides intelligent O&M compared with traditional device-centric O&M It is centered on which of the following, minutes Level of identifying cyber risks?
- A. Configuration
- B. Hardware
- C. Business
- D. Agreement
正解：C
質問 # 69
Which of the following is not part of the analysis scope of the iMaster NCE-FabricInsight network snapshot function?
- A. BGP and OSPF protocols
- B. Number of packets lost on the interface
- C. Device startup configuration
- D. ARP entries
正解：C
質問 # 70
Which of the following is a hypervisor among the basic concepts of computing virtualization technology?
- A. Guest OS
- B. Hypervisor
- C. Guest Machine
- D. Host OS
正解：B
質問 # 71
Which of the following layers is not included in the overall architecture of the CloudFabric solution?
- A. Forwarding layer
- B. Server layer
- C. Application layer
- D. Control & Analysis Layer
正解：B
質問 # 72
Which of the following components does calico consist?
- A. Felix
- B. BGP client
- C. Route Reflector
- D. etcd
正解：A、B、C、D
質問 # 73
How many switches do PFC deadlock detection need to work together?
- A. Four units are synergistic
- B. Two units work together
- C. It is completed independently by a single unit
- D. Three units are synergistic
正解：C
質問 # 74
Which of the following descriptions of Kubernetes' network solution, Macvlan, is wrong?
- A. MACVLAN requires the physical NIC to support promiscuous mode, the container gateway is on the physical switch, and the container IP relies on manual configuration and management
- B. Macvlan is one of the features of Linux Kernel, and it is also a network solution that can be natively supported by Docker
- C. The Macvlan scheme naturally supports automatic assignment of container IP addresses
- D. Macvlan is an L2 bridging scheme
正解：C
解説：
Analysis: Macvlan is one of the features of Linux Kernel, and it is also a network solution that can be natively supported by Docker, which is configured through Macvlan for container networks and host networks Containers have the same network capabilities as hosts, and cross-node container access does not require NAT. Macvlan can be used on one of the host's network interfaces either Multiple virtual network interfaces are configured on the VLAN sub-interfaces for use by the container, and these virtual network interfaces have independent MAC addresses and IP addresses. *Macvlan requires a physical NIC to support promiscuous mode, and the container gateway is on the physical switch, which has the disadvantage of not having IPAM (IP Address Mangement) and container IP Rely on manual configuration and management.
質問 # 75
Which of the following descriptions of the data plane intent verification function of iMaster NCE-FabricInsight is incorrect?
- A. Data plane intent verification verifies the impact of configuration changes on the network in advance through pre-simulation modeling
- B. This function can determine whether the actual forwarding behavior of the network is consistent with the user's service intent
- C. This feature is modeled based on data plane information, such as routing forwarding entries and ARP entries
- D. This function verifies the connectivity of the entire network and tests whether there are problems such as routing black holes and routing loops in the network
正解：A
解説：
Analysis: Option C is incorrect: Data plane validation is based on real-time analysis of data to verify whether the results are in line with intent.
質問 # 76
Which of the following options is a software platform in the HPC scenario of Huawei's CloudFabric solution ?
- A. Math Library
- B. Operating System
- C. Scheduler
- D. Compiler
正解：A、B、C、D
質問 # 77
In the process of open and programmable evolution of CloudFabric network services, APIs evolve from atomic APIs to network service APIs and then to intent APIs Which of the following is a web service API?
- A. NETCONF API
- B. RESTful API
- C. RESFCONF API
- D. Service Chain API
正解：D
質問 # 78
Which of the following is one of the following benefits of CloudFabric Easy?
- A. Simplified provisioning: second-level provisioning, simulation verification, and intelligent O&M
- B. Stand-alone version is supported
- C. Simplified architecture: Simplified networking, simplified control, and pre-installed devices
- D. Simplified configuration: bundles cost less
正解：A、B、C、D
質問 # 79
When the source VM and the destination VM are connected to the same Leaf switch, the EPG packet information is easy to obtain if micro-segmentation is deployed. However, in the cross-leaf scenario, if the source VM and the destination VM are not connected to the same leaf switch, the packet information needs to be passed in the packet Which of the following scenarios was used?
- A. Carry the source EPG group ID in the G flag in the header of the VXLAN packet
- B. In the 802. 1Q header carries the source EPG group ID
- C. Carry the source EPG group ID in the VNI field in the VXLAN packet header
- D. Carry the source EPG group ID in the reserved field in the VXLAN packet header
正解：D
質問 # 80
After installing a CloudFabric data center network based on iMasterNCEFabric, the connectivity test is performed in iMasterNCEFabric, and the result is displayed as "FailedWhich of the following features is recommended for further detection?
- A. Business simulation
- B. Loop detection
- C. Data consistency check
- D. Single-path detection
正解：D
質問 # 81
An MPI collection operation is when all processes in a communication space work together to accomplish a specific data operation and transmission. Which of the following items fall into a common collection action type?
- A. MPI_Scatter
- B. P2P
- C. MPI_Gather
- D. MPI_AllReduce
正解：A、C、D
質問 # 82
Which one is wrong in the description of calico, the networking solution for Kubernetes?
- A. Think of the server running the container as a router, and then run the specified routing protocol on the router
- B. Felix is primarily used to store the metadata of the calico and to serve as a communication hub for the various components of the calico
- C. Use BGP as the routing protocol
- D. In large-scale networking, a route reflector is used to synchronize pod routes across the network
正解：B
質問 # 83
Which concept in the MDC orchestration model is mapped to the TGW routing table in the AWS public cloud model in the CloudFabric solution?
- A. TransitVAS
- B. TGW Router
- C. External gateways
- D. TransitRouter
正解：D
解説：
Resolution: A transit router is mapped to a TGW route table . Please refer to the MDC manual.
質問 # 84
When a Huawei switch enables any of the following functions, it can quickly manage and control access hosts?
- A. AI ECN
- B. NPCC
- C. IQCN
- D. INOF
正解：D
質問 # 85
Which of the following descriptions of underlay routing is wrong when deploying a data center network?
- A. When OSPF is used for underlay routing, only single-region OSPF can be deployed
- B. OSPF is recommended for small and medium-sized data center networks, and EBGP is recommended for large and medium-sized networks
- C. Compared with OSPF, EBGP has lower computational consumption and better scalability
- D. When EBGP is used for underlay routing, each group of active-active leaves is deployed on an AS
正解：A
解説：
Analysis: ABC is correct D is incorrect, generally ospf in the design, fabric is ospf non-backbone area, fabric The network between is the backbone of area0.
質問 # 86
In Huawei's CloudFabric solution, in the scenario where the Border Leaf and Service Leaf are separated, what are the correct descriptions of the following principles for traffic orchestration between internal and external networks?
- A. The route to the external network on the border leaf is delivered by the iMaster NCE-Fabric controller, and only static routes can be delivered to connect with the external network
- B. The controller creates the corresponding tenant VRF and egress VRF on the Border Leaf based on the tenant network and the external network
- C. The controller creates the corresponding tenant VRF and egress VRF on the Service Leaf based on the tenant network and the external network
- D. The backhaul route from the external network to the tenant network needs to be configured by the external network and cannot be delivered by the iMaster NCE-Fabric controller
正解：C、D
質問 # 87
The following is about CloudFabric Data Center IPv6 Network Underlay Routing (OSPFv3 and BGP4+).
Which one is correct?
- A. Compared with BGP4+, OSPFv3 has complex configurations and large routing domains
- B. If the TOR size is less than 100, we recommend that BGP4+ be used for the Under1ay route
- C. Compared with OSPFv3, BGP4+ has flexible routing control and is suitable for large-scale networking
- D. When the TOR scale is greater than 200, we recommend that OSPFv3 be used for underlay routes
正解：C
質問 # 88
What are the correct descriptions of VXLAN Overlay multicast in the following descriptions?
- A. The VXLAN tunnel can still be configured as headend replication without special configuration
- B. When deploying multicast using PIM-SM mode, separate RPs need to be deployed on both the underlay and the overlay
- C. BGP NG MVPN carries I-PMSI information for I-PMSI tunnel establishment
- D. There is no need to deploy multicast in the underlay
正解：B、C
解説：
Analysis: *The RP of the underlay multicast network needs to be configured in the VPN instance that carries the overlay multicast traffic for the overlay network RP of an overlay multicast network . That is, the RP of both the underlay and the overlay need to be configured in the same physical network (in the figure, Public VRF refers to the underlay ). The network control plane is not a VPN entity that carries specific services Example). * Since the access location of the overlay service multicast source is uncertain, the underlay multicast uses the ASM service model. *Configure PIM SM function enablement on all Layer 3 interfaces of Leaf and Spine interconnection, built on top of the PIM SM protocol Underlay multicast trees. *From the perspectives of network architecture, stability, and alleviating the pressure on VTEP devices, it is recommended that Spine do RP and publish the RP address to Underlay Network. To alleviate the burden of a single RP, implement RP backup, optimize the multicast data forwarding path, and deploy Anycast RP on 2 Spines with dual-node redundancy.
質問 # 89
Linux systems are divided into user space and kernel space, which of the following types of data encapsulation is not completed in kernel space?
- A. Transport layer encapsulation
- B. Data link layer encapsulation
- C. Physical layer encapsulation
- D. Network layer encapsulation
正解：C
質問 # 90
Which of the following RDMA networks can implement RDMA across network segments over Ethernet
- A. RoCE v2
- B. iWARP
- C. InfiniBand
- D. RoCE v1
正解：A、B
質問 # 91
The data center CloudFabric solution is ahead of competitors in terms of competitiveness and cases, which of the following is not a function of the CloudFabric solution?
- A. NSH and microsegmentation
- B. Active/standby control clusters
- C. Simulation verification is supported
- D. The control supports the deployment of a single controller
正解：D
質問 # 92
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