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

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Questions # 1:

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:

Data plane intent verification

Network health

Device snapshot comparison

Network snapshot comparison

Answer

Questions # 2:

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

Options:

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

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

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

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

Answer

Explanation

Analysis: Plug-in Agent: The plug-in agent needs to be deployed on each host running the hypervisor and provides local virtual switch configuration, depending on the specific plug-in type used.

Common agents include ML2 plug-in agents, OpenSwitch agents, and Linux Bridge agents .

Questions # 3:

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

Options:

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

If you need to access different VMs within the same VPC within the same VPC , you must create an external network on OpenStack

If you want to access the Internet, you need to create an external network on OpenStack and an external gateway on iMaster NCE-Fabric

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"

Answer

A, C, D

Explanation

Parse:

Questions # 4:

After the dual-stack transformation of the Internet access area of the data center network, which of the following methods can the network egress choose to interconnect with the operator's IPv network?

Options:

Static IPv6 routes

OSPFv3

IBGP4+

EBGP+

Answer

A, D

Questions # 5:

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

Options:

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

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

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

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

Answer

A, C

Explanation

Resolution: Nova-compute is deployed on compute nodes

Questions # 6:

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

Options:

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

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

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

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

Answer

Explanation

Resolution: VTEP2 needs to have a matching import RT to receive routes, so EVPN instances or IP VPN instances must have 100:1 to receive routes.

Questions # 7:

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

Options:

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

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

Simplified configuration: bundles cost less

Stand-alone version is supported

Answer

A, B, C, D

Questions # 8:

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:

Based on MAC address or IP address

According to the port number

Prefix and suffix based on the name of the virtual machine

Prefix and suffix based on the hostname

Answer

A, C, D

Explanation

Parse:

Questions # 9:

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:

Underlay way

VLAN Hand-off

End-to-end VXLAN

Segment VXLAN

Answer

B, D

Explanation

Analysis: There are three ways to implement inter-site interconnection in the Multi-Site solution : Segment VXLAN, L3 Underlay, and VLAN Hand-off. L3 Underlay mode: Layer 3 interconnection between Fabric underlays, through IGP or BGP Routes are cleared from the service CIDR block, VXLAN packets are directly decapsulated on the Fabric Gateway, and forwarded through the underlay based on IGP/BGP routes.

Questions # 10:

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

Options:

VPC Gateway

Logical Router

VPC route table

Subnet

Answer

Explanation

Resolution: Use Logic Router in MDC's Unified Logic Model to map to AWS's VPC routing table, and one Logic Router to one VPC route table. Therefore, the association of the subnet with the Logic Router is mapped to the association of the subnet with the VPC routing table on AWS.

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