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Huawei H12-921_V1.0 certification exam is a written exam that consists of multiple-choice questions. H12-921_V1.0 exam has a duration of three hours and is available in multiple languages. The passing score for the exam is 600 out of 1000. Candidates who pass the exam will receive the HCIE-Data Center Network (Written) V1.0 certification.
Huawei H12-921_V1.0 exam is intended for candidates who have a strong understanding of data center networking concepts and technologies. To be eligible for the exam, candidates must have a minimum of five years of experience in IT or networking, as well as a strong understanding of data center networking technologies. Additionally, candidates must have a solid understanding of network security, storage networking, and virtualization technologies.
NEW QUESTION # 33
After a CloudFabric data center network is changed, you can use which of the following functions of iMaster NCE-FabricInsight can be used to perform ARP on the device before and after the change ? Item comparison analysis
- A. Intelligence at the edge
- B. Data plane intent verification
- C. Network health
- D. Device snapshot comparison
Answer: D
Explanation:
Resolution: IMaster NCE-FabricInsight creates a network snapshot task before configuration changes. You can create snapshots by fabric, including resource snapshots, protocol snapshots, configuration file & table entry snapshots, and telemetry metric snapshots.
NEW QUESTION # 34
At which layer of headers is the ECN tag located in the message?
- A. IP Layer Header
- B. Ethernet layer header
- C. TCP layer header
- D. UDP layer header
Answer: A
Explanation:
Parsing: ECN congestion markers use the last two bits of the ToS field in the header of the IP packet
NEW QUESTION # 35
What are the correct terms of the following description of the logical concepts of the CloudFabric solution iMasterNCEFabric?
- A. Logic Switch: Used to connect different VMs to ensure that VMs can communicate with other VMs within the Layer 2 network
- B. LoadPortVM is an access point into the network, and a physical port of a network device can be virtualized as multiple LoaicPorts
- C. Tenant: The basic unit of enterprise business management, and a tenant can only create one VPC
- D. Logic Router: Used to connect VMs located on different networks, ensuring that VMs can communicate with other VMs across a three-layer network
Answer: A,B,D
NEW QUESTION # 36
Which of the following descriptions of open source OpenStack Neutron components is correct?
- A. Core Plug-in provides services including Network, Subnet, Port, and Router
- B. Compute nodes include: Core Plug-in, Agent, and Service Plug-in
- C. The Neutron Server is responsible for receiving the Message Queuing request and invoking the appropriate plug-in to process it
- D. The plug-in agent is deployed on every host running the hypervisor and provides a local virtual switch configuration
Answer: D
Explanation:
Analysis: Plug-in Agent: The plug-in agent needs to be deployed on each host running the hypervisor and provides local virtual switch configuration, depending on the specific plug-in type used.
Common agents include ML2 plug-in agents, OpenSwitch agents, and Linux Bridge agents .
NEW QUESTION # 37
In the CloudFabric cloud-network integration scenario, which of the following descriptions of secondary restore is incorrect?
- A. After services delivered by the cloud platform are restored on iMaster NCE-Fabric, you can use the batch configuration function to perform batch secondary orchestration
- B. The service chain can be configured for secondary restoration
- C. MDC cross-DC orchestration is not supported
- D. By default, VPC interconnection does not support communication between the same subnet under different routers
Answer: C
Explanation:
Resolution: A is correct, please refer to the NCE-fabric manual. D Correct. OpenStack does not support business chain orchestration. B Correct. C is incorrect, MDC cross-DC business orchestration is supported.
NEW QUESTION # 38
Which of the following descriptions of the basic concepts of Neutron is wrong?
- A. Security Group implements basic access control for virtual machine traffic
- B. External Network is a special type of network that enables virtual machines to communicate with external networks
- C. The virtual machine can access the external network through the floating IP, but the outside world cannot access the virtual machine through the FLoating IP
- D. Router is used to connect subnets within a tenant to the same network or between different networks, as well as to connect internal and external networks
Answer: C
NEW QUESTION # 39
Which of the following descriptions of distributed training is wrong?
- A. In model parallelism, each compute node will only interact with the trained sub-model and obtain the final model through model aggregation
- B. Data parallelism and model parallelism are common distributed training methods
- C. In data parallelism, each computing node trains the complete model based on local data
- D. Distributed training can support the training of massive data and complex models
Answer: A
NEW QUESTION # 40
When service provisioning fails in the CloudFabric data center network, which of the following functions can be used to simulate service provisioning in iMaster NCE-Fabric to view specific problems
- A. Fault alarms
- B. Tenant snapshot rollback
- C. Service connectivity testing
- D. Business simulation
Answer: D
NEW QUESTION # 41
Which of the following descriptions of multivariate computation is wrong?
- A. The supercomputing power corresponding to high-performance computing mainly refers to the computing power provided by high-performance computing clusters such as supercomputers
- B. The basic computing power corresponding to the basic general technology mainly refers to the computing power provided by the server based on the CPU chip
- C. Multivariate computing can provide basic general-purpose computing, artificial intelligence computing, and high-performance computing, all of which need to be carried over lossless networks
- D. The intelligent AI computing power corresponding to AI computing mainly refers to the computing power provided by accelerated computing platforms based on chips such as CPUs, NPUs, and FPGA ASICs to provide AI training and inference
Answer: C
NEW QUESTION # 42
IN THE CLOUDFABRIC SOLUTION, WHEN USING MDC TO ROW AWS HAS A CLOUD NETWORK, IGWS IN THE AWS TYPE WILL BE PROJECTED AS WHICH OF THE FOLLOWING OPTIONS? ?
- A. External Gateways
- B. IGW routing table
- C. Logic Router
- D. TransitRouter
Answer: A
NEW QUESTION # 43
In the Huawei CloudFabric solution, the network controller uses the NETCONF device to deliver configurations. Which of the following encodings does NETCONF information use?
- A. XML
- B. PROTOBUF
- C. JSON
- D. HTML
Answer: A
NEW QUESTION # 44
In the CloudFabric Cloud-Network Integration OpenStack scenario, two dual-stack VMs in a company's intranet are in the same VPC, and they want to send files to each other (without going through the firewall). In this case, when you create a subnet on the OpenStack cloud platform, you do not need to specify which of the following parameters?
- A. Associated routes
- B. IP version
- C. Subnet name
- D. Network address
Answer: A
NEW QUESTION # 45
Which of the following descriptions of lossless network prioritization design for multivariate computing is wrong?
- A. Huawei data center switches support the PFC function based on DSCP priority
- B. Huawei data center switches support the 8021p priority-based PFC function
- C. You need to plan a separate priority queue for RoCE traffic and enable the PFC feature
- D. In a VXLAN lossless network, switching devices can directly schedule traffic based on the priority of the IP header in the inner layer of VXLAN
Answer: D
Explanation:
Resolution: A or B are two priority identities that can be trusted and queued for either of them. Option C is a best practice and is designed non-destructively for RoCE traffic alone. Priority scheduling is based on the outer priority identifier of the tunnel protocol. The vxlan protocol is no exception, so D is incorrect.
NEW QUESTION # 46
Which of the following describes the error in CloudFabric's ZTP solution?
- A. In the in-band networking scenario, the iMaster NCE-Fabric must manage the root device
- B. In out-of-band networking, iMaster NCE-Fabric must manage out-of-band management switches
- C. Link comparison after the device is brought online
- D. Supports underlay network detection
Answer: B
Explanation:
Analysis: For out-of-band networking, there is no root device, but an out-of-band management switch is used to form an independent management network for all devices, servers, and iMaster NCE. In out-of-band networking, devices and servers to be brought online are no different from those in in-band networking.
Out-of-band management switches: iMaster NCE does not accept out-of-band management switches for forwarding devices on out-of-band management networks, and you need to manually underlay the out-of-band management switches . Spine and leaf devices communicate with the DHCP server through out-of-band management switches, and DHCP Relay is not required in Layer 2 networking scenarios and configuration is required on out-of-band management switches in Layer 3 networking scenarios DHCP Relay Management network port: that is, the interface corresponding to the management cable of the switch in the figure. Except for out-of-band management switches, all METH ports are used as management network ports. The out-of-band management network is divided into out-of-band Meth port management network and VPN isolated out-of-band management network, the difference between the two is that the configuration of the management network port is different, and the management network port in the out-of-band Meth port management network binds the device management IP, and The management port of the out-of-band management network in the VPN isolation management network is bound to the management VPN. Powered device: indicates the device at the previous level of the device to be brought online. In out-of-band networking, no online device exists when a Spine device goes online with ZTP, and when a server leaf device goes online with ZTP, the online device is Spine Equipment. *For in-band networking: iMaster NCE: used to perform ZTP deployment tasks and manage them to be launched Equipment. Root device: The root device is a device that has been managed by iMaster NCE to connect to the device to be brought online, and as the DHCP Relay of the device to be brought online, it applies for a temporary IP address from the DHCP server for the device to be brought online . In the in-band networking scenario, a root device exists, and the root device needs to be manually managed by the user. Spine and Leaf:
CE switches that perform ZTP on-line operations. Currently, Spine and Server Leaf are mainly supported to go live via ZTP. If you want to use ZTP to go online to Border Leaf, you need to use the device as a Server Leaf first, and then use iMaster NCE to set the device Border Leaf configures external gateways, etc. Pending Device: A CE switch device that is performing the ZTP onboarding task . Powered device: indicates the device at the previous level of the device to be brought online. In the in-band networking scenario, when a Spine device goes online with ZTP, the online device is the root device, and when a server leaf device goes online with ZTP, the online device is Spine devices. DHCP Server: Used to assign temporary management IP addresses, default gateways, DNS server addresses, and SFTP to devices that perform ZTP Server address and other information. The DHCP server can use a third-party server (third-party server scenario) or the built-in DHCP function of iMaster NCE (built-in scenario). There is no dashed frame in the built-in scene. SFTP server: used to save the Python scripts, version files, and license files that need to be loaded by the device during the ZTP process. The SFTP server can use a third-party server (third-party server scenario) or the built-in SFTP function of iMaster NCE (built-in scenario), which has a built-in part without a dotted box in the scene.
NEW QUESTION # 47
In the DCQCN algorithm, which of the following roles sends ECN set packets?
- A. CP
- B. RP
- C. DP
- D. NP
Answer: A
NEW QUESTION # 48
Which of the following components in Huawei's intelligent lossless network solution architecture for multi-computing scenarios offloads the RDMA input layer and the following protocol stacks to the NIC hardware, so that peripherals can directly access the memory of the remote host?
- A. NIC driver
- B. SmartNIC
- C. iMasterNCEFabric
- D. Network equipment
Answer: B
NEW QUESTION # 49
Which of the following monitoring log levels does iMaster NCE-FabricInsight support?
- A. 0 ~ 6
- B. 0 ~ 5
- C. 0 ~ 7
- D. 0 ~ 4
Answer: D
NEW QUESTION # 50
Which of the following descriptions of open source OpenStack storage components is correct?
- A. Cinder provides object storage services
- B. Cinder is generally used for long-term storage of persistent type of data at rest
- C. Swift provides block storage services
- D. Swift is generally used to store virtual machine images, data backups, etc
Answer: D
NEW QUESTION # 51
Runbook action (An action is composed of multiple steps, in which of the following APIs should each step be required??)
- A. RESTful
- B. gRPC
- C. OpenFlow
- D. NETCONF
Answer: A
NEW QUESTION # 52
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Huawei H12-921_V1.0 (HCIE-Data Center Network (Written) V1.0) Certification Exam is a highly sought-after certification for professionals in the field of data center networking. HCIE-Data Center Network (Written) V1.0 certification is designed to validate the skills and knowledge required for designing, building, and managing data center networks. H12-921_V1.0 exam covers a range of topics, including network architecture, cloud computing, virtualization, storage, and security.
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