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H12-893_V1.0試験資料 & H12-893_V1.0模擬練習

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Huawei H12-893_V1.0 認定試験の出題範囲：

>> H12-893_V1.0試験資料 <<

H12-893_V1.0模擬練習、H12-893_V1.0試験解説

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Huawei HCIP-Data Center Network V1.0 認定 H12-893_V1.0 試験問題 (Q57-Q62):

質問 # 57
Which of the following is not included in the physical architecture of a server?

• A. Hardware
• B. VMmonitor
• C. Application
• D. OS

正解：C

解説：
The physical architecture of a server refers to the tangible and low-level components that constitute the server itself, distinct from logical or software layers. Let's evaluate each option:
A . Application: Applications are software running on top of an operating system or virtual machine, not part of the server's physical architecture. They belong to the logical or user layer, not the physical structure. Not Included.
B . VMmonitor (Hypervisor): Assuming "VMmonitor" refers to a hypervisor (e.g., KVM or Xen), it's a software layer, but in Type-1 hypervisor scenarios, it runs directly on hardware, managing VMs. In Huawei's context, it's considered part of the server's operational architecture when deployed physically. Included.
C . OS (Operating System): The OS (e.g., Linux, Windows) runs directly on server hardware or within a VM. In bare-metal servers, it's a core component of the physical deployment. Included.
D . Hardware: Hardware (e.g., CPU, RAM, NICs, disks) is the foundational physical architecture of a server, providing the physical resources for all operations. Included.
Thus, A (Application) is not part of the physical architecture, as it's a higher-level software entity, not a physical component.

質問 # 58
An enterprise builds a DC and deploys iMaster NCE-Fabric to automatically deliver network configurations. After the engineer manually deploys the underlay network and delivers overlay network configurations through iMaster NCE-Fabric, it is found that tenant hosts cannot access external networks. Which of the following is not a possible cause of this fault?

• A. The MAC address of the NVE interface on the VXLAN network is not manually specified.
• B. No firewall security policy is configured when host traffic passes through the firewall.
• C. No return route is configured on the PE.
• D. The engineer did not check whether the service loopback interface needs to be configured on the VXLAN network based on the switch model.

正解：A

解説：
In Huawei's CloudFabric Solution, iMaster NCE-Fabric automates overlay network (e.g., VXLAN) configuration, while the underlay network is manually deployed. Tenant hosts failing to access external networks indicate a connectivity issue, likely at the overlay-underlay boundary or security layer. Let's evaluate each option as a possible cause:
A . No return route is configured on the PE: This is a possible cause. The Provider Edge (PE) device (e.g., border leaf or router) must have a return route to the tenant's VXLAN network for external access. Without it, traffic from external networks cannot reach the DC. POSSIBLE CAUSE.
B . The engineer did not check whether the service loopback interface needs to be configured on the VXLAN network based on the switch model: This is a possible cause. Some Huawei switch models (e.g., CE series) require a service loopback interface as the VTEP source IP. If omitted or misconfigured based on the model, external connectivity fails. POSSIBLE CAUSE.
C . No firewall security policy is configured when host traffic passes through the firewall: This is a possible cause. If a firewall is in the path (e.g., between tenant VPC and external network), a missing security policy (e.g., allowing outbound traffic) blocks access. POSSIBLE CAUSE.
D . The MAC address of the NVE interface on the VXLAN network is not manually specified: This is not a possible cause. The Network Virtualization Edge (NVE) interface in VXLAN does not require a manually specified MAC address; it uses the switch's system MAC or auto-generates one. iMaster NCE-Fabric typically handles this automatically, and manual specification is neither required nor a common fault point for external access issues. NOT A POSSIBLE CAUSE.
Thus, D is not a possible cause of the fault.

質問 # 59
Which of the following statements are true about a routing design that employs OSPF on the underlay network of a DC? (Select All that Apply)

• A. It is recommended that all devices be planned in Area 0.
• B. Typically, the IP address of Loopback0 is configured as the VTEP IP address and the same IP address is planned for active-active leaf nodes in the same group.
• C. The network type of spine and leaf nodes can be set to P2P in order to accelerate convergence.
• D. This routing design is recommended when the DC has more than 300 switches.

正解：B、C

解説：
OSPF (Open Shortest Path First) is a routing protocol used in the underlay network of Huawei's CloudFabric DCNs. Let's evaluate each statement:
A . Typically, the IP address of Loopback0 is configured as the VTEP IP address and the same IP address is planned for active-active leaf nodes in the same group: This is true. Loopback0 IP is commonly used as the VTEP IP for stability, and in active-active leaf node groups (e.g., M-LAG), the same IP can be configured with VRRP or anycast to ensure consistency. TRUE.
B . The network type of spine and leaf nodes can be set to P2P in order to accelerate convergence: This is true. Setting OSPF network type to Point-to-Point (P2P) on spine-leaf links reduces overhead (e.g., no DR/BDR election) and speeds up convergence, a recommended practice in Huawei DCNs. TRUE.
C . This routing design is recommended when the DC has more than 300 switches: This is false. OSPF is suitable for smaller to medium-sized DCNs (e.g., up to 200-300 switches). For larger networks (>300 switches), EBGP is preferred due to better scalability and reduced complexity. FALSE.
D . It is recommended that all devices be planned in Area 0: This is false. While a single Area 0 is possible for small DCNs, multi-area OSPF is recommended for larger networks to manage scalability and reduce routing table size, avoiding a flat Area 0 design. FALSE.
Thus, A and B are true statements about OSPF routing design in a DC underlay.

質問 # 60
Which of the following technologies are Layer 4 load balancing technologies? (Select All that Apply)

• A. PPP
• B. Nginx
• C. HAProxy
• D. LVS

正解：B、C、D

解説：
Layer 4 load balancing operates at the transport layer (OSI Layer 4), using TCP/UDP protocols to distribute traffic based on information like IP addresses and port numbers, without inspecting the application-layer content (Layer 7). Let's evaluate each option:
A . Nginx: Nginx is a versatile web server and reverse proxy that supports both Layer 4 and Layer 7 load balancing. In its Layer 4 mode (e.g., with the stream module), it balances TCP/UDP traffic, making it a Layer 4 load balancing technology. This is widely used in Huawei's CloudFabric DCN solutions for traffic distribution. TRUE.
B . PPP (Point-to-Point Protocol): PPP is a Layer 2 protocol used for establishing direct connections between two nodes, typically in WAN scenarios (e.g., dial-up or VPNs). It does not perform load balancing at Layer 4 or any layer, as it's a point-to-point encapsulation protocol. FALSE.
C . LVS (Linux Virtual Server): LVS is a high-performance, open-source load balancing solution integrated into the Linux kernel. It operates at Layer 4, using techniques like NAT, IP tunneling, or direct routing to distribute TCP/UDP traffic across backend servers. It's a core Layer 4 technology in enterprise DCNs. TRUE.
D . HAProxy: HAProxy is a high-availability load balancer that supports both Layer 4 (TCP mode) and Layer 7 (HTTP mode). In TCP mode, it balances traffic based on Layer 4 attributes, making it a Layer 4 load balancing technology. It's commonly deployed in Huawei DCN environments. TRUE.
Thus, A (Nginx), C (LVS), and D (HAProxy) are Layer 4 load balancing technologies. PPP is not.

質問 # 61
When an SDN controller cluster is deployed in Huawei CloudFabric Solution, which of the following network planes are divided based on carried services? (Select All that Apply)

• A. Southbound service plane
• B. BGP microservice plane
• C. Internal communication plane
• D. Northbound management plane

正解：A、C、D

解説：
In Huawei's CloudFabric Solution, the iMaster NCE-Fabric SDN controller cluster separates network planes based on carried services to ensure scalability and security. Let's evaluate each option:
A . BGP microservice plane: This is not a standard plane in Huawei's SDN architecture. BGP is used in the underlay/overlay but not defined as a separate microservice plane for the controller. FALSE.
B . Southbound service plane: This is true. The southbound plane carries configuration and control data to network devices (e.g., via NETCONF, BGP-EVPN), a critical service plane in SDN. TRUE.
C . Northbound management plane: This is true. The northbound plane provides APIs for management applications and orchestration (e.g., OpenStack integration), handling service requests. TRUE.
D . Internal communication plane: This is true. This plane facilitates communication between controller cluster nodes for synchronization and high availability. TRUE.
Thus, B (Southbound service plane), C (Northbound management plane), and D (Internal communication plane) are the network planes divided based on carried services.

質問 # 62
......

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