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

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Questions # 21:

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

Options:

IPC

PID

UIS

UID

Answer

Explanation

Resolution: Process ID space (PID NS , Process ID namespace): so that the process IDs in different PID namespaces can be duplicated without affecting each other;

Questions # 22:

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

Options:

Router

Switch

Root Complex

PCIe Endpoint

Answer

Explanation

Parse:

Questions # 23:

Which of the following is a hypervisor among the basic concepts of computing virtualization technology?

Options:

Hypervisor

Guest OS

Guest Machine

Host OS

Answer

Questions # 24:

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:

Subnet name

Associated routes

Network address

IP version

Answer

Questions # 25:

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

Options:

DAS

IP SAN

NAS

FC SAN

Answer

Explanation

Resolution: Both AB and D are block storage.

Questions # 26:

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:

PFC deadlock prevention

PFC deadlock detection

AI ECN

DCQCN

Answer

Questions # 27:

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

Options:

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

A router can only associate one vFW and vice versa

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

A Project can contain multiple Routers

Answer

Explanation

Resolution: Option A is correct, Resolution: AZ and DC can be flexibly mapped according to the actual deployment situation. For example, in a large-scale public cloud, an AZ can contain multiple DCs, in a small and medium-sized private cloud, multiple sets of independent AZs can be set up in a DC, and a DC can be planned as one AZ, where DC and AZ are equivalent. Option B is wrong, as can be seen in the following diagram

The ratio of Router to vFW is N:1

Questions # 28:

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?

Options:

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

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

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

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

Answer

Questions # 29:

When any of the following functions is enabled on a Huawei switch, can it send CNP packets?

Options:

AI ECN

INOF

NPCC

INC

Answer

Questions # 30:

Which of the following descriptions of the RTT requirements between different PoDs is correct in the Multi-PoD scenario of the CloudFabric solution?

Options:

No more than 50ms

No more than 100ms

No more than 10ms

No more than 1s

Answer

Explanation

Analysis: When using the Multi-PoD solution, it is recommended that the iMaster NCE-Fabric and the central DC device pull the RTT latency by <=50 ms. It is recommended that the iMaster NCE-Fabric and Edge DC Leaf extend the RTT latency by <=300 ms. If the active/standby disaster recovery deployment mode of iMaster NCE-Fabric controllers is used, the latency between controllers is < = 20 ms.

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