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  • Exam Name: HCIE-Data Center Network (Written) V1.0
  • Last Update: Sep 13, 2025
  • Questions and Answers: 239
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H12-921_V1.0 Practice Exam Questions with Answers HCIE-Data Center Network (Written) V1.0 Certification

Question # 6

Which of the following is NOT a core component of Kubernetes?

A.

LoadBalancer

B.

kubelet

C.

etcd

D.

API Server

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Question # 7

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

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Question # 8

Which of the following is NOT a VXLAN proprietary concept?

A.

VRF

B.

VNI

C.

VTEP

D.

NVE

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Question # 9

iMaster NCE-Fabric provides an intelligent event function based on user intent, which can close the loop on fault events. Which of the following is a closed-loop approach to business failures?

A.

This section displays the details of the abnormal re-insurance flow monitoring

B.

Notify the user of a failure

C.

Provide a remediation plan

D.

Fix the network configuration associated with an unknown link

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Question # 10

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

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Question # 11

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

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Question # 12

Centralized storage generally provides data storage by the storage array, which of the following components does the storage array contain?

A.

Power module

B.

controller

C.

Hard disk enclosure

D.

Interface modules

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Question # 13

What are the correct terms of the following description of ECN high and low thresholds?

A.

If the queue cache is higher than the high threshold, all packets are discarded

B.

When the queue cache is above the high threshold, all ECN tokens are performed

C.

The queue cache is above the low threshold but below the high threshold, and the closer it is to the high threshold, the higher the probability of tagging

D.

When the queue cache falls below a low threshold, no ECN tagging is performed

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Question # 14

Which of the following options can be deployed in a lossless CloudFabric network to avoid the header blocking problem (HeadOfLineBlockingHOLB occurs?).

A.

PFC Deadlock Prevention

B.

PFC deadlock detection

C.

AI ECN

D.

INOF

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Question # 15

Which of the following components of open source OpenStack has a core function of providing monitoring services?

A.

Ceilometer

B.

Manila

C.

Trove

D.

Neutron

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Question # 16

Which of the following descriptions of distributed training is wrong?

A.

In data parallelism, each computing node trains the complete model based on local data

B.

Distributed training can support the training of massive data and complex models

C.

Data parallelism and model parallelism are common distributed training methods

D.

In model parallelism, each compute node will only interact with the trained sub-model and obtain the final model through model aggregation

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Question # 17

Device configuration parameters can be adjusted when using the edge intelligence function of iMaster NCE-FabricInsight for specified stream analysis. Which of the following device configurations cannot be automatically delivered during UDP specified stream analysis?

A.

Active aging time

B.

ACL Number

C.

Whether the VXLAN packet is matched

D.

Whether to match TAG packets with a layer 1 VLAN

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Question # 18

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.

By default, VPC interconnection does not support communication between the same subnet under different routers

C.

MDC cross-DC orchestration is not supported

D.

The service chain can be configured for secondary restoration

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Question # 19

In a data center network, which of the following technologies can be used to achieve sub-second data collection?

A.

SNMP

B.

Telemetry

C.

NETCONF

D.

RESTCONF

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Question # 20

In microsegmentation, if the EPG packet information corresponding to the source IP exists in the source leaf, there is no EPG packet message corresponding to the destination IP on the destination side Which of the following behaviors is correct?

A.

On the target side, the leaf matches the default access control policy of the EPG group members

B.

On the source side, Leaf matches the default access control policy of the EPG group members

C.

On the source side, the leaf matches the default access control policy of the unknown EPG group member

D.

On the target side, the leaf matches the default access control policy of the unknown EPG group member

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Question # 21

Which of the following in server virtualization provides a user interface, has functions such as monitoring and managing virtualized resource pools, simplifying virtual machine management processes, and configuring resource scheduling policies and execution rules?

A.

Hypervisor

B.

Virtualization management platform

C.

Virtual machines

D.

Host OS

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Question # 22

Which of the following RDMA networks can implement RDMA across network segments over Ethernet

A.

InfiniBand

B.

RoCE v1

C.

RoCE v2

D.

iWARP

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Question # 23

There are different scenarios for the service orchestration of the data center overlay network, which of the following scenarios needs to be unified through the cloud platform to realize the virtualization and resource pooling of computing, storage, and network resources in the DC?

A.

Cloud-network integration scenario

B.

Container network scenario

C.

Rack rental scenario

D.

Calculate the linkage scenario

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Question # 24

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.

Business

B.

Configuration

C.

Hardware

D.

Agreement

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Question # 25

Which of the following types does the iMasterNCEFabricRunbook work contain?

A.

Do

B.

Retry

C.

Rollback

D.

DryRun

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Question # 26

What is wrong in the following description of the open source OpenStack Nova component?

A.

Nova relies on Keystone, Neutron, Glance, and Heat when creating virtual machines

B.

In some previous versions of OpenStack, Nova was responsible for implementing compute, storage, and networking functions

C.

Nova deploys Nova Compute on the control node to connect with hypervisors of different platforms to achieve virtualization platform agnosticism

D.

Nova supports the management of bare metal, virtual machines, and containers

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Question # 27

In an HPC solution, which of the following nodes is typically installed on a GPU?

A.

Accelerate the node

B.

Fat nodes

C.

MPI node

D.

Log in to the node

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Question # 28

In the service chain, firewall (FW), load balancing (LB), application accelerator, legitimacy interception, NAT, etc. are collectively referred to as which of the following?

A.

SFF

B.

SF

C.

sc

D.

SFP

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Question # 29

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.

Service connectivity testing

B.

Business simulation

C.

Tenant snapshot rollback

D.

Fault alarms

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Question # 30

Which of the following Linux namespaces implements process IDs that can be duplicated but do not affect each other?

A.

IPC

B.

PID

C.

UIS

D.

UID

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Question # 31

As shown in the figure, in the Multi-Site scenario of the CloudFabric solution, traffic destined for VM2 to VM1 passes through the two fabrics in the order of which of the following options GW's VRF?

H12-921_V1.0 question answer

A.

VPC2 VRF->VPC1 VRF

B.

VRF2->VRF1

C.

VRF2->VPC1 VRF

D.

VPC2 VRF->VRF 1

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Question # 32

In Huawei's CloudFabric solution, if you want to use a third-party VAS device to provide value-added services, which of the following VAS device management modes should you use if the VAS device cannot be managed by the controller ? ?

A.

Service Policy

B.

Network Policy

C.

Service Manager

D.

Network Manager

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Question # 33

How many core-layer switches are required in a typical 4-element Fat-Tree topology in an HPC solution?

A.

6

B.

8

C.

2

D.

4

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Question # 34

Which of the following IPv6 transformation solutions for data center networks only needs to transform the egress gateway to support IPV4/IPv6 dual-stack services, which requires less transformation effort and less impact on existing network services?

A.

Dual-stack renovation scheme for Internet access area

B.

Create an IPv6 single-stack solution for Internet access zones

C.

Export NAT64 retrofit scheme

D.

Dual-stack transition and transformation scheme for Internet access area

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Question # 35

Which of the following descriptions of BD in a VXLAN network is correct?

A.

BD messages are encapsulated in VXLAN packets to identify a large Layer 2 broadcast domain

B.

In a VXLAN network, the BD and the VLAN tag of the connected service packet form a 1:N mapping

C.

In a VXLAN network, BD is a local concept, and as long as the L2 VNI is the same on different leaves, it can be considered to be in the same large Layer 2 broadcast domain

D.

Multiple BDs can share a single VBDIF interface

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Question # 36

Which of the following descriptions of the Underlay Distributed Gateway Networking Solution (VLAN Scheme) of Multivariate Computing Lossless Network is wrong?

A.

This solution uses different BDs to achieve inter-tenant isolation to meet the security requirements of multi-tenant isolation

B.

Spine is deployed as a stand-alone L3 device and forms ECMP with Leaf to achieve traffic load balancing

C.

The Leaf switch is deployed as an L3 gateway and needs to enable the ARP Any-Agent feature

D.

Spine-Leaf supports Layer 2 or Layer 3 networking

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Question # 37

In the container network scenario of the CloudFabric solution, when the container L3 is connected, the calico CNI plug-in does not need to configure which parameters of the container NIC?

A.

VLAN

B.

routing

C.

IP

D.

MAC

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Question # 38

What are the correct items in the following description of the deployment of CloudFabricNoF solution?

A.

The iNOF feature is enabled on the switch

B.

The iNOF feature is enabled on the storage node

C.

SNSD is enabled on the storage node

D.

AIECN is enabled on the switch

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Question # 39

In the container network scenario of the CloudFabric solution, when the container accesses the network through the L3 route mode, which of the following components establishes a BGP neighbor relationship with the ToR ?

A.

CNI Plugin

B.

vRouter

C.

bird

D.

etcd

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Question # 40

Data center networks usually use the Spine-Leaf architecture, in which VAS devices such as FW and LB are connected to the data center network through which of the following nodes?

A.

Border Leaf

B.

Spine

C.

Service Leaf

D.

ServerLeaf

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Question # 41

iMaster NCE-Fabric supports the three-level rollback function, which of the following refers to the backup and rollback of a single point of service of a single tenant?

A.

Network-wide rollback

B.

Configure rollback

C.

Tenant rollback

D.

Business rollback

Full Access
Question # 42

Which of the following is not included in the PCIe fabric?

A.

Router

B.

Switch

C.

Root Complex

D.

PCIe Endpoint

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Question # 43

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.

Subnet name

B.

Associated routes

C.

Network address

D.

IP version

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Question # 44

Which of the following is one of the following benefits of CloudFabric Easy?

A.

Simplified architecture: Simplified networking, simplified control, and pre-installed devices

B.

Simplified provisioning: second-level provisioning, simulation verification, and intelligent O&M

C.

Simplified configuration: bundles cost less

D.

Stand-alone version is supported

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Question # 45

In a CloudFabric-based data center network, which of the following security functions can be used to enable external access by hosts on the external network to actively and securely access the services provided by the internal network?

A.

SNAT

B.

IPsec VPN

C.

Virtual systems

D.

EIP

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Question # 46

Centralized storage generally provides data storage by the storage array, which of the following components does the storage array contain?

A.

Power module

B.

controller

C.

Hard disk enclosure

D.

Interface modules

Full Access
Question # 47

In the CloudFabric Cloud-Network Integration OpenStack scenario, a company wants the VMs created in the data center to be able to access the Internet Which of the following is the key content created on OpenStack?

A.

Business chain

B.

Security group

C.

External Networks

D.

External gateways

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Question # 48

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

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Question # 49

In which of the following storage network architectures does the storage array provide file storage to the server?

A.

IP SAN

B.

FC SAN

C.

DAS

D.

NAS

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Question # 50

In the open-source OpenStack business model, which of the following is the mapping between the Router and the Network?

A.

1:1

B.

1:N

C.

N:1

D.

N:N

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Question # 51

In a CloudFabric multi-computing lossless network, if a device wants to remove the PFC deadlock by not responding to a backpressure frame, which of the following lossless functions needs to be deployed?

A.

PFC deadlock prevention

B.

PFC deadlock detection

C.

AI ECN

D.

DCQCN

Full Access
Question # 52

Which of the following descriptions of data center interconnection solutions is wrong?

A.

The VLAN hand-off mode enables L2 communication between data centers

B.

In SegmentVXLAN mode, EVPN routes are transmitted in a three-stage mode to implement L3 communication between data centers

C.

The E2E EVPNVXLAN mode directly establishes a VXLAN tunnel between the VTEPs in two data centers

D.

After a VXLAN is established in the local mode in the segment VXLAN mode, packets are encapsulated with the local DCILeaf when they arrive at the local DCI Leat and are sent to the peer DCI Leat VNI, not the VNI of the peer DCI Leaf

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Question # 53

Which of the following items can be detected by the underlay network post-event verification function implemented on iMaster NCE-Fabric?

A.

Routing black holes

B.

Network configuration parameters

C.

Routing loops

D.

Path connectivity

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Question # 54

Which of the following options are included in the action type of a runbook in the CloudFabric network business open programmable overall solution?

A.

Rollback

B.

WithDraw

C.

Commit

D.

DryRun

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Question # 55

Which of the following types of routes does BGPMVPN advertise multicast source information?

A.

Type 1 Routing (Intra-ASI-PMSIA-Droute).

B.

5 Class Routing (SourceActiveA-Droute).

C.

6 Class Routing (Share Tree Join route).

D.

7 Class Routing (SourceTreeJoinroute).

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Question # 56

Which of the following descriptions of the OpenStack business model is wrong?

A.

Multiple sets of independent AZs can be set up in a DC, and a DC can also be planned as an AZ

B.

A router can only associate one vFW and vice versa

C.

A Project is a unit of resources, and a Project can be deployed within one or more PoDs, and a PoD can host multiple sets of resources

D.

A Project can contain multiple Routers

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Question # 57

Which of the following does not support cross-site L2 interoperability in the Multi-Site interconnection scenario of the CloudFabric solution?

A.

VLAN Hand-off

B.

L3 Underlay

C.

End-to-end VXLAN

D.

Segment VXLAN

Full Access
Question # 58

Which of the following objects does the OpenStackFWaaSv model consist of?

A.

Firewall

B.

Firewall Policy

C.

Firewall Rule

D.

FirewalAction

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Question # 59

In the computing linkage scenario of the CloudFabric solution, when the VM is wired, iMasterNCEFabric senses the port on which of the host connects to the leaf point through which of the following protocols? ?

A.

LLDP

B.

NETCONF

C.

HTTP

D.

gRPC

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Question # 60

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

Full Access
Question # 61

What are the major scenarios covered by Huawei's CloudFabric solution?

A.

Cloud-network integration scenario

B.

Interface with third-party controllers, such as VMwareNSX controllers

C.

underlay, which is configured through a third-party configuration tool such as Ansible

D.

Computing linkage (virtualization) scenarios

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Question # 62

In a VXLAN network, VTEP1 sends an IRB route with an RT value of 100:1 to VTEP2 VTEP2 will drop the route?

A.

In VTEP2, the inbound RT of EVPN instances is 100:1, and the inbound RT of IP VPN instances is 200:1

B.

In VTEP2, the inbound RT of EVPN instances is 200:1, and the inbound RT of IP VPN instances is 100:1

C.

In VTEP2, the inbound RT of EVPN instances is 100:1, and the inbound RT of IP VPN instances is 100:1

D.

In VTEP2, the inbound RT of EVPN instances is 200:1, and the inbound RT of IP VPN instances is 200:1

Full Access
Question # 63

In which of the following storage network architectures does the storage array provide file storage to the server?

A.

DAS

B.

IP SAN

C.

NAS

D.

FC SAN

Full Access
Question # 64

Which of the following descriptions of open source OpenStack Neutron components is correct?

A.

The plug-in agent is deployed on every host running the hypervisor and provides a local virtual switch configuration

B.

Compute nodes include: Core Plug-in, Agent, and Service Plug-in

C.

Core Plug-in provides services including Network, Subnet, Port, and Router

D.

The Neutron Server is responsible for receiving the Message Queuing request and invoking the appropriate plug-in to process it

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Question # 65

In a CloudFabric solution, the fault detection and fault-tolerant design of the firewall includes ?().

A.

A heartbeat cable is deployed between the two FWs to check the status of the peer FW and the heartbeat link connectivity

B.

It is recommended that each FW and service be connected in a single-arm mode, and the upstream and downstream logical ports fail at the same time, resulting in higher failover performance

C.

Link fault: If any link on the edge leaf of the FW primary connection fails, the M-lag member port goes down, and the double homing becomes single homing, which does not affect the forwarding of FW primary traffic

D.

FW fault: After the FW is switched over to the primary/standby, the FW sends a free ARP packet to trigger the refresh of the forwarding entries on the switch and direct the traffic to the FW standby

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Question # 66

Which of the following options is an OpenStackNeutron component?

A.

Core Plug-in

B.

Service Plug-in

C.

Agent

D.

NeutronServer

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Question # 67

In the cross-device forwarding scenario, which of the following VXLAN segments is used to obtain EPG group information between the source VM and the destination VM on the same device?

The transmission of?

A.

VNI

B.

BD

C.

Group Policy ID

D.

EPGID

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Question # 68

When using one of the following network modes, the communication between the Docker machine and the external network needs to be realized through NAT?

A.

None

B.

Host

C.

Bridge

D.

Container

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Question # 69

Which of the following describes the error of the three-level rollback function supported by iMaster NCE-Fabric?

A.

Network-wide rollback allows you to roll back the entire network configuration to before the configuration change to quickly restore services

B.

The three-level rollback function supports manual backup and automatic backup, and supports automatic recovery when the network is abnormal

C.

Tenant snapshots are backups and restores of the network at tenant granularity

D.

Service rollback supports single-point service recovery

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Question # 70

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

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Question # 71

Which of the following NoF implementations is Huawei's CloudFabricNoF solution?

A.

NVMe over RoCE

B.

NVMe over FC

C.

NVMe over TCP

D.

NVMeoverUDP

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