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H12-921_V1.0 Sample Questions Answers

Questions 4

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?

Options:

A.

SNAT

B.

IPsec VPN

C.

Virtual systems

D.

EIP

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Questions 5

Which of the following descriptions of Kubernetes' network solution, Macvlan, is wrong?

Options:

A.

Macvlan is one of the features of Linux Kernel, and it is also a network solution that can be natively supported by Docker

B.

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

C.

The Macvlan scheme naturally supports automatic assignment of container IP addresses

D.

Macvlan is an L2 bridging scheme

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Questions 6

In the container network scenario of the CloudFabric solution, when the container L3 is connected, which of the following components undertakes the task of establishing a BGP neighbor relationship with the ServerLeaf?

Options:

A.

Etcd

B.

Bird

C.

CNI Plugin

D.

VSwitch

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Questions 7

As shown in the diagram, when DCs are interconnected via VLAN Hand-off, which of the following describes the error?

Options:

A.

DCI-GW requires VXLAN support

B.

DCI-GW does not learn the routes between the service host and the network

C.

Transmission of common VLAN packets between the Fabric-GW and the DCI-GW

D.

The DCI network only passes the underlay route for the DCI-GW

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Questions 8

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?

Options:

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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Questions 9

Which of the following is not supported by iMaster NCE-FabricInsight MDA in a multi-cloud and multi-DC scenario?

Options:

A.

Visibility of cross-DC application access traffic

B.

Cross-DC network health assessments

C.

Visibility of traffic to and from each other across DC networks

D.

Unified configuration across DC underlay networks

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Questions 10

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

Options:

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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Questions 11

When service packets are connected to a VXLAN network through a Layer 2 sub-interface, different flow encapsulation types need to be configured on different Layer 2 sub-interfaces

The same physical interface can access different data packets. Which of the following is NOT a stream encapsulation type that is supported by a Layer 2 sub-interface?

Options:

A.

QinQ

B.

Untag

C.

Dotlq

D.

Trunk

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Questions 12

In a CloudFabric solution, which concept in the AWS public cloud model does the Logic Router in the MDC orchestration model map to?

Options:

A.

VPC Gateway

B.

Logical Router

C.

VPC route table

D.

Subnet

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Questions 13

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

Options:

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

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Questions 14

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?

Options:

A.

VLAN

B.

routing

C.

IP

D.

MAC

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Questions 15

Which of the following options is wrong in the description of the characteristics of the L2 bridging solution in the container network scenario of the CloudFabric solution?

Options:

A.

Multiple virtual network interfaces can be configured on a single network interface or VLAN subinterface of a host

B.

Virtual network interfaces have separate MAC addresses and IP addresses

C.

Containers have the same networking capabilities as hosts

D.

NAT is required for cross-node container access

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Questions 16

iMaster NCE-Fabric supports the Layer 3 topology intersight function, which of the following is not included?

Options:

A.

Application network topology

B.

Logical network topology

C.

Physical network topology

D.

Business network topology

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Questions 17

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?

Options:

A.

PFC deadlock prevention

B.

PFC deadlock detection

C.

AI ECN

D.

DCQCN

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Questions 18

Which of the following is Huawei's deep learning framework?

Options:

A.

PyTorch

B.

CloudAI

C.

TensorFlow

D.

MindSpore

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Questions 19

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

Options:

A.

Nova-API uses a RESTful API to tell Nova-Schedule to select a physical server

B.

Nova-Schedule will perform two steps of Filter and Weight when allocating compute nodes

C.

By default, Nova-Schedule uses the number of CPUs as the weight value of the physical machine to select the optimal physical machine

D.

The user's virtual machine operation request is passed to the Nova component via the Nova API

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Questions 20

In the Multi-Site scenario of a CloudFabric solution, what are the correct items in the following description of Layer 2 interoperability?

Options:

A.

In the mapped VNI mode, the Fabric GW at both ends uses BGP EVPN to negotiate a mapped VNI, and all packets sent to the peer end are routed using the mapped VNI VXLAN packing

B.

In practice, different sites have their own independent VNI space, so VXLAN tunnels inside different sites are likely to use different VNI C. Layer 2 interconnection is supported in two modes: local VNI and mapped VNI

C.

In local VNI mode, the local VNI of the local Fabric GW is used as the outbound VXLAN packet to encapsulate VXLAN packets to the VNI

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Questions 21

Which logical network model of iMaster NCE-Fabric can be mapped to a Bridge Domain in VXLAN?

Options:

A.

LogicLink

B.

LogicSwitch

C.

LogicVAS

D.

LogicRouter

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Questions 22

Which of the following interface standards uses SCSI instructions?

Options:

A.

FC

B.

IDE

C.

SAS

D.

SATA

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Questions 23

In Huawei's SDN solution, what is the wrong description of the FusionSphere business model?

Options:

A.

PODs are physical units, i.e. a Fabric network can be thought of as a POD.

B.

VDC is a resource unit, VDC supports cross-POD deployment, and tenants rent resources at VDC granularity.

C.

VPC is a business unit, and VPC supports cross-POD deployment.

D.

VMs are virtual machines, and VMs can be deployed across VPCs.

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Questions 24

When configuring micro-segmentation in an automated orchestration mode on iMaster NCE-Fabric, which of the following attributes can be used to create an EPG??

Options:

A.

Based on MAC address or IP address

B.

According to the port number

C.

Prefix and suffix based on the name of the virtual machine

D.

Prefix and suffix based on the hostname

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Questions 25

How many queues does PFC support in total?

Options:

A.

6

B.

8

C.

4

D.

2

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Questions 26

What are the correct terms of the following descriptions of underlays and overlay networks?

Options:

A.

Underlay is logically isolated from overlay, and as long as the routes between tunnel endpoints are reachable, the failure of the underlay network will not directly affect the overlay network

B.

Overlay Routes for the network are generated by routes that are ingested into the underlay network

C.

When implementing the overlay technology in the underlay network, the original underlay network needs to be modified to a certain extent

D.

From the perspective of an overlay network, the underlay network is transparent to devices connected outside of the VXLAN tunnel endpoints

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Questions 27

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

Options:

A.

Accelerate the node

B.

Fat nodes

C.

MPI node

D.

Log in to the node

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Questions 28

The following: "Support docking with the community or third-party commercial OpenStack + third-party cloud management platform." "What level of the CloudFabric solution architecture is described?"

Options:

A.

Network service layer

B.

Business presentation/collaboration layer

C.

Network Analysis/Control Layer

D.

Compute the access layer

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Questions 29

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

Options:

A.

DAS

B.

IP SAN

C.

NAS

D.

FC SAN

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Questions 30

Linux namespace mainly solves the problem of environmental isolation, we also need to solve the isolation of computer resource use, which of the following techniques is used to achieve this requirement?

Options:

A.

Process ID

B.

Storage I/0

C.

Hypervisor

D.

Cgroup

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Questions 31

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

Options:

A.

L3 VNI is associated with a VPN instance to forward VXLAN packets across subnets, and VPIN instances associated with different L3 VNIs only need to be RT Values can be matched to achieve interoperability

B.

A tenant can have one or more VNIs with a VNI length of 16 bits, supporting millions of tenants

C.

L2 VNI is used to forward VXLAN packets on the same subnet, and different BDs can also use the same L2 VNI to achieve Layer 2 communication on VXLAN networks. All VXLAN packets carry both L2 VNI and L3 VNI

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Questions 32

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

Options:

A.

SFF

B.

SF

C.

sc

D.

SFP

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Questions 33

Which of the following describes the error in the CloudFabric network virtualization scenario?

Options:

A.

Network administrators control the network through iMaster NCE-Fabric

B.

When the compute administrator creates the VM, select the PortGroup for the corresponding network

C.

Compute administrators manage compute resources through VMM

D.

iMaster NCE-Fabric obtains the connection between the host and the TOR port through VMM

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Questions 34

When Huawei switches enable any of the following functions, can ensure the low-latency transmission of HPC small byte packets?

Options:

A.

IQCN

B.

INOF

C.

INC

D.

AI ECN

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Questions 35

Which of the following options is an OpenStackNeutron component?

Options:

A.

Core Plug-in

B.

Service Plug-in

C.

Agent

D.

NeutronServer

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Questions 36

Based on the multiple computing scenarios of Huawei' s CloudFabric intelligent lossless network solution, what are the correct descriptions of HPC cluster network design?

Options:

A.

The HPC cluster network adopts a planar design that considers the business plane, management plane, and computing plane separately

B.

High-performance computing networks are used for communication between computing nodes, requiring networks with low latency and high throughput, and are generally deployed as lossless networks

C.

The service management network is used for cluster management, resource monitoring, and other related business operations, and is usually deployed as a TCP/IP lossy network

D.

Both the high-performance computing network and the storage front-end network must be deployed independently to ensure high network performance and prevent mutual interference

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Questions 37

In the CloudFabric cloud-network integration scenario, which of the following descriptions of secondary restore is incorrect?

Options:

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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Questions 38

After a CloudFabric data center network changes its services, which of the following functions can be used to compare the change results with user intent with the help of iMaster NCE-FabricInsight?

Options:

A.

Data plane intent verification

B.

Network health

C.

Device snapshot comparison

D.

Network snapshot comparison

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Questions 39

In the DCQCN algorithm, which of the following roles sends ECN set packets?

Options:

A.

NP

B.

DP

C.

CP

D.

RP

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Questions 40

In the DCQCN algorithm, which of the following is handled when the RP receives a CNP packet?

Options:

A.

The RP sends an ECN set packet

B.

RP reduces the packet send rate

C.

The RP sends a PFC counterpressure

D.

The RP pauses packet sending

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Questions 41

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

Options:

A.

SNMP

B.

Telemetry

C.

NETCONF

D.

RESTCONF

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Questions 42

In the scenario of the CloudFabric distributed storage network solution, if the storage front-end network and the back-end network are deployed in a converged manner, how many NICs are required for each storage server?

Options:

A.

3

B.

4

C.

2

D.

1

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Questions 43

Which of the following device statistics cannot be viewed in the device management of iMaster NCE-Fabric?

Options:

A.

switchboard

B.

router

C.

firewall

D.

server

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Questions 44

Which of the following components of open-source OpenStack provides management services for the lifecycle of bare metal servers?

Options:

A.

Ironic

B.

Nova

C.

Horizon

D.

Heat

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Questions 45

Which of the following types of network overlay networking does the CloudFabric solution consist of?

Options:

A.

Hub-Spoke

B.

Full-mesh

C.

Centralized gateways

D.

Distributed gateways

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Questions 46

In the CloudFabric network virtualization scenario, which of the following interfaces does iMaster NCE-Fabric use to obtain VM online information?

Options:

A.

SNMP

B.

NETCONF

C.

WebService

D.

gRPC

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Questions 47

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

Options:

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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Questions 48

Which of the following descriptions of NAT64 technology is wrong?

Options:

A.

Static NAT64 requires static configuration of IPv6 and IPv4 address mapping, which does not require refresh or aging

B.

The well-known NAT64 prefix 64: FF9B::/96 already exists by default and does not need to be configured

C.

The custom NAT64 prefix can be of any length, which can be 32, 36, 40, 44, etc

D.

The NAT64 device determines whether the packet performs NAT64 translation based on the IPv6 prefix of the destination address of the IPv6 data packet

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Questions 49

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

Options:

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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Questions 50

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?

Options:

A.

MPI_Scatter

B.

MPI_AllReduce

C.

MPI_Gather

D.

P2P

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Questions 51

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

Options:

A.

None

B.

Host

C.

Bridge

D.

Container

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Questions 52

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?

Options:

A.

Subnet name

B.

Associated routes

C.

Network address

D.

IP version

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Questions 53

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

Options:

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"

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Questions 54

Which of the following describes the error in CloudFabric's ZTP solution?

Options:

A.

In out-of-band networking, iMaster NCE-Fabric must manage out-of-band management switches

B.

In the in-band networking scenario, the iMaster NCE-Fabric must manage the root device

C.

Link comparison after the device is brought online

D.

Supports underlay network detection

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Questions 55

Which of the following components is used to manage Huawei's firewall in the CloudFabric solution cloud-network integration scenario?

Options:

A.

OpenStack Cloud Platform

B.

SecoManager

C.

IMaster NCE-Fabric

D.

NMS

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Questions 56

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?

Options:

A.

VPC2 VRF->VPC1 VRF

B.

VRF2->VRF1

C.

VRF2->VPC1 VRF

D.

VPC2 VRF->VRF 1

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Questions 57

Which of the following descriptions of the business chain is wrong?

Options:

A.

In the NSH implementation, the service chain function is implemented by inserting the NSH header into VXLAN packets

B.

In the PBR implementation, the controller delivers PBR diversion policy routes to SFF and SC nodes hop-by-hop through NETCONF

C.

In PBR implementation, the controller delivers filtering and redirection policies to the SC nodes to selectively redirect service traffic

D.

In the NSH implementation, the SF node must support NSH

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Questions 58

In the Multi-Site solution of the CloudFabric solution, if you want to achieve Layer 2 communication between sites, which of the following interconnection methods can be selected?

Options:

A.

Underlay way

B.

VLAN Hand-off

C.

End-to-end VXLAN

D.

Segment VXLAN

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Questions 59

Which of the following data center deployment scenarios is typically used to achieve business continuity and ensure uninterrupted service to users in the event of a failure?

Options:

A.

Intra-city active-active

B.

Two places and three centers

C.

Edge DC

D.

Hybrid cloud

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Questions 60

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

Options:

A.

memory

B.

hard disk

C.

flash memory

D.

CPU

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Questions 61

Write a Python script to construct a NETCONF message using the ncclient library and configure the system time of the device by calling the API in which of the following options?

Options:

A.

Intent API

B.

Web Services API

C.

Atomic APIs

D.

Business APIs

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Questions 62

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

Options:

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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Questions 63

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?

Options:

A.

NETCONF

B.

SNMP

C.

OpenFlow

D.

RESTful/RPC

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Questions 64

Which of the following hard disk media does not support the NVMe interface protocol in mainstream server scenarios?

Options:

A.

SCM

B.

SSD

C.

DRAM

D.

HDD

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Questions 65

What are the correct descriptions of VAS service provisioning in the network virtualization scenario of Huawei CloudFabric Solution?

Options:

A.

IMaster NCE-Fabric supports backhaul routes delivered to managed third-party VASs to the Fabric network

B.

IMaster NCE-Fabric supports route configuration and VAS service delivery from Huawei VAS to Fabric network

C.

IMaster NCE-Fabric supports the delivery of route configuration from the Fabric network to the VAS side, regardless of whether the VAS is managed by the controller or not

D.

IMaster NCE-Fabric supports business automation orchestration of third-party VAS, as long as the VAS is within the scope of the controller

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Questions 66

Which of the following protocols can implement dynamic VXLAN tunnel establishment in a data center network?

Options:

A.

BGP EVPN

B.

M-LAG

C.

OSPF

D.

MPLS

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Questions 67

What is correct about the following description of Docker?

Options:

A.

Image in Docker can be regarded as a special file system, which only provides the programs required by the container runtime, and the libraries, resources, configurations, and other files required by the container runtime are hosted by the host Machine OS provides

B.

The Docker engine obtains the image from the repository and runs the container on the corresponding host

C.

Image files are stored centrally in a repository and can be public or private

D.

Docker containers are created based on images, and a running container is a process running on a Docker host

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Questions 68

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?

Options:

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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Questions 69

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 ? ?

Options:

A.

Service Policy

B.

Network Policy

C.

Service Manager

D.

Network Manager

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Questions 70

What are the correct items in the following description of lossless network architecture design in multivariate computing scenarios?

Options:

A.

In the case of a two-level network, the Spine switch does not have an uplink interface, and all ports are used to connect to the Leaf switch

B.

When designing a network architecture, a bottom-up approach is generally used to determine how many layers of architecture to use based on the size of the network

C.

In two-tier networking, the number of Spine switches is equal to the total number of upstream interfaces of all leaf switches divided by the number of interfaces per Spine switch and rounded up by D

D.

First, the total number of network access interfaces is determined according to the number of computing nodes in the cluster and the number of service interfaces of each node

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Questions 71

When the cloud platform creates a VM resource, it needs to call multiple components, such as Nova, Cinder, Glance, etc., and the authentication and authentication between the components depends on which of the following options?

Options:

A.

Freezer

B.

Watcher

C.

Keystone

D.

Zun

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Exam Code: H12-921_V1.0
Exam Name: HCIE-Data Center Network (Written) V1.0
Last Update: Dec 3, 2024
Questions: 239
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