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

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Viewing questions 51-60 out of questions

Questions # 51:

Which of the following technologies is required when the IPv6 network of a data center interconnects with multiple ISP egresses and provides service access for IPv6 users?

ADDRESS TRANSLATION Between IPV6 AND IPv6?

Options:

NAT64

IVI

NAT44

NAT66

Answer

Explanation

Analysis: NAT66 technology: The carrier assigns a public IPv6 address prefix to the private IPv6 user group, and the public IPv6 prefix may change, and the IPv6 user hopes to obtain it

Public network resources, and there is no need to change the private IP configuration when the public IPv6 prefix changes. In order to meet the above requirements, the NAT66 function is configured on the gateway device at the edge of the network to convert the private network address into the public network address, and protect the privacy and security of the private IPv6 users while accessing the public network to obtain resources . Application scenario: When a data center network is connected to multiple ISPs, you can use NAT66 technology for IPv6 address translation, otherwise you need to configure IPv6 for multiple ISPs address, which increases the O&M workload.

Questions # 52:

Which of the following descriptions of underlay routing is wrong when deploying a data center network?

Options:

OSPF is recommended for small and medium-sized data center networks, and EBGP is recommended for large and medium-sized networks

Compared with OSPF, EBGP has lower computational consumption and better scalability

When EBGP is used for underlay routing, each group of active-active leaves is deployed on an AS

When OSPF is used for underlay routing, only single-region OSPF can be deployed

Answer

Explanation

Analysis: ABC is correct D is incorrect, generally ospf in the design, fabric is ospf non-backbone area, fabric The network between is the backbone of area0.

Questions # 53:

Which of the following types of virtual NICs can be created by the Linux server?

Options:

Tun

Tap

Linux Bridge

OVS

Answer

A, B

Questions # 54:

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

Options:

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

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

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

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

Answer

A, C

Explanation

Resolution: A option error: nova component communicates internally via message queue. Option C error: nova-scheduler calculates the weight value by default based on the amount of free memory of the compute node.

Questions # 55:

Which of the following components of the CloudFabric Intelligent Lossless Network Solution for Multi-Computing Scenarios needs to support lossless features such as AI ECN to improve network performance?

Options:

iMaster NCE-FabricInsight

Router

Data center switches

SmartNICs

Answer

Questions # 56:

In the CloudFabric network service open programmable overall solution, which component is responsible for southbound interconnection with heterogeneous network devices?

Options:

AOC

FabricInsight

Business systems

Runbook

Answer

Explanation

Analysis: AOC is an open platform that can upload SND packages from corresponding vendors and support interconnection with third-party NEs.

Questions # 57:

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

Options:

memory

hard disk

flash memory

CPU

Answer

Questions # 58:

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

Options:

VLAN Hand-off

L3 Underlay

End-to-end VXLAN

Segment VXLAN

Answer

Questions # 59:

Which of the following is wrong in the description of communication between VMs in a DVS distributed virtual switch environment in server virtualization?

Options:

VMs in the same port group, if they are on different hosts, can reach DVS on the destination host through the uplink of DVS and finally complete communication with the remote VM

VMs in different port groups (belonging to different VLANs) need to go through the uplink of the DVS to the physical switch, through which the VLAN is implemented Communications

VMs in the same port group, if they are in the same host, can communicate directly via DVS

VMs that are in different DVSs but belong to the same VLAN port group can communicate directly over DVS

Answer

Explanation

Resolution: VMs that are in different DVSs but belong to the same VLAN port group cannot communicate directly with the DVS

Questions # 60:

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

Options:

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

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

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

Tenants can only use VAS services provided by carriers

Answer

A, B, C

Explanation

Analysis: Option D: In the scenario where the tenant comes with its own gateway, the tenant can have its own VAS value-added equipment. Service issuance process in rack rental scenarios: