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H12-921_V1.0
HCIE-Data Center Network (Written) V1.0 Questions and Answers

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Questions # 31:

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

Options:

Rollback

WithDraw

Commit

DryRun

Answer

A, D

Explanation

Analysis: There are 5 types of runbook actions:

Questions # 32:

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:

Active aging time

ACL Number

Whether the VXLAN packet is matched

Whether to match TAG packets with a layer 1 VLAN

Answer

Questions # 33:

In which of the following scenarios would a physical hard disk be converted into a block device?

Options:

Virtual machines access remote centralized storage devices via NFS

Virtual machines access remote centralized storage devices via iSCSI

The computer uses a local hard disk

Virtual machines access remote centralized storage devices via FC-SCSI

Answer

B, D

Questions # 34:

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?

Options:

Loop detection

Single-path detection

Business simulation

Data consistency check

Answer

Questions # 35:

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

Options:

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

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

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

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

Answer

B, D

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:

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

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

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

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

Answer

A, B, C

Explanation

Parse:

Questions # 37:

iMasterNCEFabricInsight network snapshot analysis function, which of the following objects is supported for analysis?

Options:

OSPF Protocol

Runtime configuration

ARP entries

Number of packets lost on the interface

Answer

A, B, C, D

Questions # 38:

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?

Options:

The controller creates the corresponding tenant VRF and egress VRF on the Border Leaf based on the tenant network and the external network

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

The controller creates the corresponding tenant VRF and egress VRF on the Service Leaf based on the tenant network and the external network

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

Answer

C, D

Questions # 39:

Which of the following components does not typically include in the control node of open source OpenStack?

Options:

Keystone

Nova

Cinder

Horizon

Answer

Questions # 40:

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?

Options:

Dual-stack renovation scheme for Internet access area

Create an IPv6 single-stack solution for Internet access zones

Export NAT64 retrofit scheme

Dual-stack transition and transformation scheme for Internet access area

Answer

Explanation

Analysis: Features: It is suitable for temporary solutions in the initial stage, and is not recommended. Advantages: Only need to transform the egress to dual-stack and deploy NAT64, which requires less transformation work, less impact on live network services, and can quickly provide IPv6 services. Disadvantages: NAT conversion will cause ALG problems, and the solution cannot smoothly evolve to the long-term goal of "network-wide single-stack", and the evolutionability is poor.

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