2024 Latest Huawei H12-921_V1.0 Real Exam Dumps PDF
H12-921_V1.0 Exam Dumps, H12-921_V1.0 Practice Test Questions
Huawei H12-921_V1.0 (HCIE-Data Center Network (Written) V1.0) Certification Exam is a globally recognized certification program designed for IT professionals who are interested in developing their skills and knowledge in data center network technologies. HCIE-Data Center Network (Written) V1.0 certification exam is ideal for individuals who are looking to enhance their career prospects in the IT industry and want to become a certified expert in data center networking.
NEW QUESTION # 43
Which of the following descriptions of CloudFabric component deployments is correct?
- A. IMaster NCE-FabricInsight is an optional component, and its collector and analyzer must be co-deployed
- B. SecoManager is an optional component that can be deployed in conjunction with iMaster NCE-Fabric
- C. When a large data center requires multiple sets of iMaster NCE-Fabric, MDAs can be deployed to work with multiple sets of controllers to implement cross-data center VPC service orchestration
- D. IMaster NCE-Fabric is a required component and can only be deployed in clusters
Answer: B
NEW QUESTION # 44
Which of the following components of open-source OpenStack provides management services for the lifecycle of bare metal servers?
- A. Heat
- B. Nova
- C. Horizon
- D. Ironic
Answer: D
Explanation:
Analysis: Ironic is responsible for the management of bare metal services.
NEW QUESTION # 45
Which of the following descriptions of the OpenStack business model is wrong?
- A. A router can only associate one vFW and vice versa
- B. 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
- C. A Project can contain multiple Routers
- D. Multiple sets of independent AZs can be set up in a DC, and a DC can also be planned as an AZ
Answer: A
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
NEW QUESTION # 46
As shown in the diagram, when DCs are interconnected via VLAN Hand-off, which of the following describes the error?
- A. DCI-GW requires VXLAN support
- B. Transmission of common VLAN packets between the Fabric-GW and the DCI-GW
- C. The DCI network only passes the underlay route for the DCI-GW
- D. DCI-GW does not learn the routes between the service host and the network
Answer: D
Explanation:
Resolution: Option B is wrong because there are no routes on DCI-GW for hosts and networks within the DCI, it only has routes for the inter-DCI GW to communicate. For other options, please refer to the following networking instructions.
*Networking Description: Add VXLAN-enabled devices as DCI-GW in the data center. BGP EVPN is deployed between DCI-GW to establish VXLAN tunnels, and BGP EVPN is deployed within Fabric , Fabric-GW As the endpoint of the VXLAN in the fabric, the common VLAN between the Fabric-GW and the DCI-GW is interconnected. Fabric-GW and DCI-GW are configured with VLAN access to VXLAN respectively. Cross-data center packets are decapsulated by Fabric-GW and turned into ordinary Ethernet packets, which are received by DCI-GW and then renewed The VXLAN encapsulation enters the VXLAN tunnel of the DCI and is sent to the peer data center. During L2 communication, Layer 2 broadcast domains between different data centers are opened, and different Layer 2 DNIs are mapped to different DCI VNIs through different VLANs. In L3 interconnection, the Logic Router of the VPC that requires Layer 3 interconnection is passed through DCI on the Fabric-GW of each data center The VXLAN tunnel is directly connected to Layer 2 and an eBGPIPv4 private neighbor is established to pass VPC private routes across DCs VLANs are then mapped to different DCI VNIs for isolation, ensuring communication and isolation between VMs across the data center.
NEW QUESTION # 47
In a data center network, which of the following technologies can be used to achieve sub-second data collection?
- A. NETCONF
- B. Telemetry
- C. SNMP
- D. RESTCONF
Answer: B
NEW QUESTION # 48
Which of the following layers does the CloudFabric cloud-network integration solution architecture consist of?
- A. Network Analysis/Control Layer
- B. Business presentation layer/collaboration layer
- C. Storage access layer
- D. Network service layer
Answer: A,B,D
Explanation:
Parse:
NEW QUESTION # 49
What are the following descriptions of micro-segmentation, and what are the errors?
- A. In the cross-device forwarding scenario, the destination EPG group number is written to the VXLAN packet header and forwarded to the remote VTEP
- B. Group members of the same EPG can communicate directly with each other, and there is no restriction on how they cannot communicate with each other
- C. In the local forwarding scenario, the source VM and destination VM are on the same network device, and the EPG packet information is maintained on the network device
- D. GBP is a flow control policy based on EPG packets + protocol number + port number, which specifies the flow control policies within EPG packets and between EPG packets
Answer: A,B
Explanation:
Analysis: Option A: Error, Restrict communication can also be implemented in the group Option B: Error, the source EPG group number is written to the vxlan header, and the non-destination EPG group number is written.
NEW QUESTION # 50
In the computing linkage scenario of the CloudFabric solution, when the VM is wired, iMasterNCEFabric senses the port on which of the host connects to the leaf point through which of the following protocols? ?
- A. NETCONF
- B. HTTP
- C. LLDP
- D. gRPC
Answer: C
NEW QUESTION # 51
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?
- A. IP
- B. VLAN
- C. routing
- D. MAC
Answer: B
NEW QUESTION # 52
Which of the following describes the error in the CloudFabric network virtualization scenario?
- A. Compute administrators manage compute resources through VMM
- B. Network administrators control the network through iMaster NCE-Fabric
- C. When the compute administrator creates the VM, select the PortGroup for the corresponding network
- D. iMaster NCE-Fabric obtains the connection between the host and the TOR port through VMM
Answer: D
NEW QUESTION # 53
Which of the following types of virtual NICs can be created by the Linux server?
- A. Tap
- B. Linux Bridge
- C. OVS
- D. Tun
Answer: A,D
NEW QUESTION # 54
The Telemetry function of iMaster NCE-FabricInsight supports measurement for a variety of table entries, which of the following is not supported by Telemetry?
- A. ARP entries
- B. MAC entries
- C. FIB entries
- D. ND table entry
Answer: B
NEW QUESTION # 55
If a company provides services with large bursts of traffic, large gaps in business needs between peaks and valleys, and a wide distribution of users, which of the following methods should the company adopt to deploy its services based on cost and user experience considerations?
- A. Intra-city active-active
- B. Hybrid cloud
- C. Two places and three centers
- D. Edge DC
Answer: B
Explanation:
Analysis: Typical application scenarios of hybrid cloud: business bursts, application load expansion: In order to cope with the peak demand caused by seasonality or emergencies, public cloud resources are temporarily leased to quickly improve business response capabilities and computing processing capabilities.
NEW QUESTION # 56
Which of the following components does not typically include in the control node of open source OpenStack?
- A. Nova
- B. Horizon
- C. Keystone
- D. Cinder
Answer: D
NEW QUESTION # 57
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 ? ?
- A. Network Manager
- B. Network Policy
- C. Service Policy
- D. Service Manager
Answer: B
NEW QUESTION # 58
Which of the following descriptions of dynamic NAT64 mapping is wrong when an IPv6 user accesses an IPv4 service?
- A. The NAT64 device creates a session table that records address mappings
- B. Dynamic NAT64 technology converts a large number of IPv6 addresses into a small number of IPv4 addresses with the help of address pooling
- C. DNS64 resolves the IPv4 service address and directly replies with the IPv4 address to the IPv6 user
- D. After receiving the response packets from the servers on the IPv4 network, the NAT64 device converts the IPv4 packets into IPv6 packets based on the session table
Answer: C
Explanation:
Resolution: After receiving the request packet, DNS64 parses the AAAA request, and if the IPv6 address cannot be resolved, it parses the A request, and finds that the service address is IPv4 ( 1.1.1.1), synthesizing the NAT64 address (64:FF9B::101:101) based on the configured Prefix64::/n(64:FF9B::/96). ), and then send it to the user to complete the address resolution. After receiving the DNS64 reply packet, the user sends the resolved address as the destination address to the remote server.
NEW QUESTION # 59
Which of the following monitoring log levels does iMaster NCE-FabricInsight support?
- A. 0 ~ 5
- B. 0 ~ 6
- C. 0 ~ 7
- D. 0 ~ 4
Answer: D
NEW QUESTION # 60
Which of the following objects does the OpenStackFWaaSv model consist of?
- A. Firewall
- B. FirewalAction
- C. Firewall Policy
- D. Firewall Rule
Answer: A,C,D
NEW QUESTION # 61
Of the basic concepts of computing virtualization technology, which of the following is the operating system running within a VM?
- A. Guest Machine
- B. Hypervisor
- C. Host OS
- D. Guest OS
Answer: D
Explanation:
Resolution: *The physical host running the virtual machine is called the host, i.e., the Host Machine, and the operating system that the host installs and runs is called the host operating system, i.e., the Host OS. Run The virtual machine on the host is called a guest, or Guest Machine . The operating system that the virtual machine runs on is called the guest operating system, or Guest OS . Located at Host Between the Machine and the Guest Machine is the core of all virtualization technologies - the hypervisor, which can also be called VMM . *In the physical architecture, the host has only two layers, namely the hardware layer Host Machine and the operating system layer HostOS, and the application is installed on the Host OS, while in the virtualization architecture, the host is divided into three layers, the hardware The Host Machine, which is the hypervisor, and the Guest Machine and its operating system, Guest OS, are installed in Guest OS. You can create and run multiple guest machines on a single host machine. *Guest machine and VM in the rest of this textbook refer to virtual machines.
NEW QUESTION # 62
How many core-layer switches are required in a typical 4-element Fat-Tree topology in an HPC solution?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION # 63
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?
- A. Network address
- B. Associated routes
- C. IP version
- D. Subnet name
Answer: B
NEW QUESTION # 64
Which of the following components of open source OpenStack has a core function of providing monitoring services?
- A. Manila
- B. Neutron
- C. Ceilometer
- D. Trove
Answer: C
NEW QUESTION # 65
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