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H12-921_V1.0 Huawei HCIE-Data Center Network (Written) V1.0 Free Practice Exam Questions (2025 Updated)

Prepare effectively for your Huawei H12-921_V1.0 HCIE-Data Center Network (Written) V1.0 certification with our extensive collection of free, high-quality practice questions. Each question is designed to mirror the actual exam format and objectives, complete with comprehensive answers and detailed explanations. Our materials are regularly updated for 2025, ensuring you have the most current resources to build confidence and succeed on your first attempt.

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Total 239 questions

How many queues does PFC support in total?

A.

6

B.

8

C.

4

D.

2

Which of the following components of open-source OpenStack provides a Dashboard for users to use?

A.

Cinder

B.

Heat

C.

Horizon

D.

Keystone

Which of the following descriptions of the data plane intent verification function of iMaster NCE-FabricInsight is incorrect?

A.

This feature is modeled based on data plane information, such as routing forwarding entries and ARP entries

B.

This function can determine whether the actual forwarding behavior of the network is consistent with the user's service intent

C.

Data plane intent verification verifies the impact of configuration changes on the network in advance through pre-simulation modeling

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

Which of the following options are common container management platforms?

A.

Docker

B.

Kubernetes

C.

Swarm

D.

Mesos

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 reserved field in the VXLAN packet header

B.

In the 802. 1Q header carries the source EPG group ID

C.

Carry the source EPG group ID in the G flag in the header of the VXLAN packet

D.

Carry the source EPG group ID in the VNI field in the VXLAN packet header

In the CloudFabric cloud-network integration scenario, what are the correct items described below?

A.

The IP address range corresponding to the "external gateway" on IMaster NCE-Fabric needs to be the same as the "external network" created by OpenStack "Unanimous

B.

If you need to access different VMs within the same VPC within the same VPC , you must create an external network on OpenStack

C.

If you want to access the Internet, you need to create an external network on OpenStack and an external gateway on iMaster NCE-Fabric

D.

The name of the "external gateway" on IMaster NCE-Fabric needs to be the same as the name of the "external network" created by OpenStack, or OpenStack creates a prefix for the name of the "external network"

With respect to CloudFabric's ZTP scenario, which of the following types of servers does the device get the configuration file from?

A.

DHCP server

B.

Intermediate file servers

C.

Version File Server

D.

Syslog server

Which of the following descriptions of open source OpenStack Nova components is wrong?

A.

When Nova creates a virtual machine, it calls the network interface of Glance to create the virtual machine

B.

Nova supports creating, modifying, and deleting virtual machines

C.

Nova relies on Keystone for certification services

D.

Nova is used to provide virtual computing resource services for the OpenStack cloud platform

The CPU command defines a hierarchical protection domain, in which of the following levels has the highest authority to directly operate the hardware?

A.

Ring0

B.

Ring1

C.

Ring2

D.

Ring

Which of the following is not included in an open-source OpenStack node?

A.

Control nodes

B.

Compute nodes

C.

Service nodes

D.

Network nodes

How many switches do PFC deadlock detection need to work together?

A.

Three units are synergistic

B.

It is completed independently by a single unit

C.

Two units work together

D.

Four units are synergistic

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.

Device startup configuration

C.

Number of packets lost on the interface

D.

ARP entries

In an enterprise data center, the customer assigns a virtual firewall (VSYS1 and VSYS2) to the finance department (VPC1) and the sales department (VPC2), VSYS1 If it is located in the same ServiceLeaf as VSYS2, what are the correct descriptions of traffic orchestration in this scenario?

A.

In the scenario where the Border Leaf and Service Leaf are separated, the traffic between the VPC and the VPC needs to pass through the Border Leaf

B.

In the scenario where the Border Leaf and Service Leaf are separated, the controller will create VPC1 and VPC2 on the Service Leaf according to the VPC interoperability requirements Associated VRF

C.

The tenant needs to specify the interworking VRF on the controller to complete the VPC interworking in this scenario

D.

Regardless of whether the Border Leaf and Service Leaf are co-located or separated, the traffic model is consistent

Which of the following options is NOT part of the application layer in the AI industry?

A.

Machine learning

B.

Robots

C.

Autonomous driving

D.

Smart speaker

What are the correct descriptions of the following CloudFabric solution rack rental scenarios?

A.

The controller delivers the orchestrated services to the network device for automatic configuration

B.

When a tenant submits a lease intention to an operator, it must specify the lease form, bandwidth, and value-added services

C.

The tenant obtains the server's IP , account number, password, and other information from the carrier and uses the network

D.

Tenants can only use VAS services provided by carriers

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.

HTML

C.

JSON

D.

PROTOBUF

Which of the following is NOT a disadvantage of PCIe-based NVMe?

A.

Multi-host sharing is inconvenient

B.

Limited scalability, up to 255 nodes

C.

Direct connection to the CPU is not supported

D.

Can't pull it far

In the CloudFabric solution architecture, which of the following interfaces does the control layer interconnect with the application layer, receive the service instructions issued by the application layer, and return status information to the application layer?

A.

NETCONF

B.

SNMP

C.

OpenFlow

D.

RESTful/RPC

Which of the following descriptions of the open source OpenStack Glance component is correct?

A.

Modifying an instance that is started based on an image is actually modifying the image

B.

Glance provides the ability to discover, register, and retrieve virtual machine images

C.

Virtual Machine Instance images provided by Glance can only be placed in object storage provided by Swift

D.

You can launch only one instance from the same image

Which of the following server components is used as a temporary place to store program instructions, data, and intermediate results during computation?

A.

memory

B.

hard disk

C.

flash memory

D.

CPU

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