2026 Valid H12-893_V1.0 Exam Updates - 2026 Study Guide
H12-893_V1.0 Certification - The Ultimate Guide [Updated 2026]
Huawei H12-893_V1.0 Exam Syllabus Topics:
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NEW QUESTION # 30
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. The network type of spine and leaf nodes can be set to P2P in order to accelerate convergence.
- B. It is recommended that all devices be planned in Area 0.
- C. This routing design is recommended when the DC has more than 300 switches.
- D. 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.
Answer: A,D
Explanation:
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.
NEW QUESTION # 31
Which of the following are advantages of iMaster NCE-FabricInsight's telemetry-based performance metric collection? (Select All that Apply)
- A. Quasi-real-time data collection
- B. One-off subscription and continuous data push
- C. Efficient transmission
- D. Intelligent data analysis and automated troubleshooting
Answer: A,B,C
Explanation:
iMaster NCE-FabricInsight uses telemetry for performance metric collection, offering advanced monitoring in Huawei's CloudFabric Solution. Let's evaluate each option:
A . Efficient transmission: This is true. Telemetry uses streaming data (e.g., gRPC) to reduce overhead compared to traditional polling, enabling efficient transmission of metrics. TRUE.
B . Quasi-real-time data collection: This is true. Telemetry provides near-real-time data (e.g., sub-second updates), improving responsiveness over periodic SNMP polling. TRUE.
C . Intelligent data analysis and automated troubleshooting: This is false. While FabricInsight performs intelligent analysis, automated troubleshooting is a feature of the broader iMaster NCE platform, not specifically a telemetry advantage. Telemetry enables data collection, not the automation itself. FALSE.
D . One-off subscription and continuous data push: This is true. Telemetry operates on a subscription model where a one-time setup leads to continuous data push from devices, reducing manual intervention. TRUE.
Thus, A, B, and D are advantages of telemetry-based performance metric collection.
NEW QUESTION # 32
The figure shows an incomplete VXLAN packet format.
Which of the following positions should the VXLAN header be inserted into so that the packet format is complete?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
VXLAN (Virtual Extensible LAN) is a tunneling protocol that encapsulates Layer 2 Ethernet frames within UDP packets to extend VLANs across Layer 3 networks, commonly used in Huawei's CloudFabric data center solutions. The provided figure illustrates an incomplete VXLAN packet format with the following sequence:
Outer Ethernet Header (Position 1): Encapsulates the packet for transport over the physical network.
Outer IP Header (Position 2): Defines the source and destination IP addresses for the tunnel endpoints.
UDP Header (Position 3): Carries the VXLAN traffic over UDP port 4789.
Inner Ethernet Header (Position 4): The original Layer 2 frame from the VM or endpoint.
Inner IP Header (Position 5): The original IP header of the encapsulated payload.
Payload (Position 6): The data being transported.
The VXLAN header, which includes a 24-bit VXLAN Network Identifier (VNI) to identify the virtual network, must be inserted to complete the encapsulation. In a standard VXLAN packet format:
The VXLAN header follows the UDP header and precedes the inner Ethernet header. This is because the VXLAN header is part of the encapsulation layer, providing the VNI to map the inner frame to the correct overlay network.
The sequence is: Outer Ethernet Header → Outer IP Header → UDP Header → VXLAN Header → Inner Ethernet Header → Inner IP Header → Payload.
In the figure, the positions are numbered as follows:
1: Outer Ethernet Header
2: Outer IP Header
3: UDP Header
4: Inner Ethernet Header
The VXLAN header should be inserted after the UDP header (Position 3) and before the Inner Ethernet Header (Position 4). However, the question asks for the position where the VXLAN header should be "inserted into," implying the point of insertion relative to the existing headers. Since the inner Ethernet header (Position 4) is where the encapsulated data begins, the VXLAN header must be placed just before it, which corresponds to inserting it at the transition from the UDP header to the inner headers. Thus, the correct position is D (2) if interpreted as the logical insertion point after the UDP header, but based on the numbering, it aligns with the need to place it before Position 4. Correcting for the figure's intent, the VXLAN header insertion logically occurs at the boundary before Position 4, but the options suggest a mislabeling. Given standard VXLAN documentation, the VXLAN header follows UDP (Position 3), and the closest insertion point before the inner headers is misinterpreted in numbering. Re-evaluating the figure, Position 2 (after Outer IP Header) is incorrect, and Position 3 (after UDP) is not listed separately. The correct technical insertion is after UDP, but the best fit per options is D (2) as a misnumbered reference to the UDP-to-inner transition. However, standard correction yields after UDP (not directly an option), but strictly, it's after 3. Given options, D (2) is the intended answer based on misaligned numbering.
Corrected answer: After re-evaluating the standard VXLAN packet structure and the figure's
NEW QUESTION # 33
Which of the following are the application scenarios of Huawei CloudFabric Solution? (Select All that Apply)
- A. Container network
- B. Hosting
- C. OpenFlow network
- D. Cloud-network integration
- E. Computing
Answer: A,B,D
Explanation:
Huawei's CloudFabric Solution supports various data center scenarios. Let's evaluate each option:
A . Container network: This is true. CloudFabric supports containerized environments (e.g., Kubernetes) with VXLAN and SDN integration. TRUE.
B . OpenFlow network: This is false. CloudFabric primarily uses BGP-EVPN and proprietary protocols, not OpenFlow, which is more associated with other SDN platforms. FALSE.
C . Hosting: This is true. CloudFabric is suitable for hosting environments, providing multi-tenant network services. TRUE.
D . Cloud-network integration: This is true. It integrates with cloud platforms (e.g., OpenStack) for unified management. TRUE.
E . Computing: This is false. While it supports computing resources, "computing" is not a primary scenario; it's an enabler (e.g., server connectivity). FALSE.
Thus, A, C, and D are application scenarios.
NEW QUESTION # 34
Which of the following technologies are open-source virtualization technologies? (Select All that Apply)
- A. KVM
- B. FusionSphere
- C. Hyper-V
- D. Xen
Answer: A,D
Explanation:
Virtualization technologies enable the creation of virtual machines (VMs) by abstracting hardware resources. Open-source technologies are freely available with accessible source code. Let's evaluate each option:
A . Hyper-V: Hyper-V is a hypervisor developed by Microsoft, integrated into Windows Server and available as a standalone product. It is proprietary, not open-source, as its source code is not publicly available. Not Open-Source.
B . Xen: Xen is an open-source hypervisor maintained by the Xen Project under the Linux Foundation. It supports multiple guest operating systems and is widely used in cloud environments (e.g., Citrix XenServer builds on it). Its source code is freely available. Open-Source.
C . FusionSphere: FusionSphere is Huawei's proprietary virtualization and cloud computing platform, based on OpenStack and other components. While it integrates open-source elements (e.g., KVM), FusionSphere itself is a commercial product, not fully open-source. Not Open-Source.
D . KVM (Kernel-based Virtual Machine): KVM is an open-source virtualization technology integrated into the Linux kernel. It turns Linux into a Type-1 hypervisor, and its source code is available under the GNU General Public License. It's widely used in Huawei's virtualization solutions. Open-Source.
Thus, B (Xen) and D (KVM) are open-source virtualization technologies.
NEW QUESTION # 35
In the CloudFabric Solution, SecoManager and iMaster NCE-Fabric are deployed independently. After SecoManager is installed, it needs to be manually interconnected with iMaster NCE-Fabric.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
In Huawei's CloudFabric Solution, SecoManager (Security Manager) and iMaster NCE-Fabric (Network Controller) are components of the SDN ecosystem. SecoManager handles security policy management, while iMaster NCE-Fabric manages network orchestration.
Deployment: These components can be deployed independently but are designed to integrate seamlessly. Huawei's architecture supports automated interconnection after installation, leveraging northbound/southbound APIs or pre-configured integration workflows.
Interconnection: Manual interconnection is not required post-installation; the system automates the process once both are deployed and configured within the same management domain (e.g., via IP addressing and authentication).
The statement is FALSE (B) because interconnection is automated, not manual.
NEW QUESTION # 36
VXLAN is a network virtualization technology that uses MAC-in-UDP encapsulation. What is the destination port number used during UDP encapsulation?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
Explanation:
VXLAN (Virtual Extensible LAN) is a network overlay technology that encapsulates Layer 2 Ethernet frames within UDP packets to extend Layer 2 networks over Layer 3 infrastructure, widely used in Huawei's CloudFabric data center solutions. The encapsulation process, often referred to as "MAC-in-UDP," involves wrapping the original Ethernet frame (including MAC addresses) inside a UDP packet.
UDP Encapsulation: The VXLAN header follows the UDP header, and the destination UDP port number identifies VXLAN traffic. The Internet Assigned Numbers Authority (IANA) has officially assigned UDP port 4789 as the default destination port for VXLAN.
Options Analysis:
A . 4787: This is not a standard VXLAN port and is not recognized by IANA or Huawei documentation.
B . 4789: This is the correct and widely adopted destination port for VXLAN, as specified in RFC 7348 and implemented in Huawei's VXLAN configurations.
C . 4790: This port is not associated with VXLAN and is unused in this context.
D . 4788: This is not a standard VXLAN port; it may be confused with other protocols but is not correct for VXLAN.
Thus, the destination port number used during UDP encapsulation in VXLAN is B (4789), aligning with Huawei's VXLAN implementation standards.
NEW QUESTION # 37
Which of the following can be used as the conditions for microsegmentation to divide EPGs? (Select All that Apply)
- A. MAC address
- B. VM name
- C. Operating system
- D. IP address
Answer: A,B,C,D
Explanation:
Microsegmentation in Huawei's data center networks (e.g., CloudFabric with SDN) divides Endpoint Groups (EPGs) to enforce fine-grained security policies. EPGs group endpoints (e.g., VMs) based on attributes. Let's evaluate each option:
A . Operating system: This is true. The OS type (e.g., Linux, Windows) can be used to segment EPGs, enabling policy enforcement based on OS-specific security needs. TRUE.
B . VM name: This is true. VM names can be used as identifiers for microsegmentation, allowing policies to target specific VMs. TRUE.
C . IP address: This is true. IP addresses are commonly used to define EPG boundaries, especially for network-based segmentation. TRUE.
D . MAC address: This is true. MAC addresses can segment EPGs, particularly for Layer 2-based policies or device-specific isolation. TRUE.
All options A, B, C, and D are valid conditions for microsegmentation to divide EPGs in Huawei's implementation.
NEW QUESTION # 38
Which of the following statements are true about the tenant service model? (Select All that Apply)
- A. One logical router is mapped to one VRF.
- B. An EPG can have only one subnet.
- C. A tenant can apply for independent compute, storage, and network resources.
- D. A subnet supports the access of only one VM.
Answer: A,C
Explanation:
The tenant service model in Huawei's data center networks (e.g., CloudFabric with SDN) organizes resources for multi-tenancy. Let's evaluate each statement:
A . A tenant can apply for independent compute, storage, and network resources: This is true. Tenants in a multi-tenant environment can request isolated compute (VMs), storage (volumes), and network (VLANs/VXLAN VNIs) resources, a core feature of Huawei's tenant isolation model. TRUE.
B . One logical router is mapped to one VRF: This is true. A Virtual Routing and Forwarding (VRF) instance is associated with a logical router to provide isolated Layer 3 routing for a tenant, a standard practice in Huawei's network virtualization. TRUE.
C . An EPG can have only one subnet: This is false. An Endpoint Group (EPG) in Huawei's ACI-like models can span multiple subnets, grouping endpoints (e.g., VMs) based on policies, not limited to a single subnet. FALSE.
D . A subnet supports the access of only one VM: This is false. A subnet can support multiple VMs, as it defines an IP address range for a network segment, not a one-to-one VM mapping. FALSE.
Thus, A and B are true statements about the tenant service model.
NEW QUESTION # 39
Which of the following statements are true about common storage types used by enterprises?
- A. Block storage typically applies to remote backup storage.
- B. Block storage applies to databases that require high I/O.
- C. FTP servers are typically used for file storage.
- D. Object storage devices are typically disk arrays.
Answer: B,C
Explanation:
Comprehensive and Detailed in Depth
A . FTP servers are typically used for file storage.
This is correct. FTP (File Transfer Protocol) servers are indeed a common way to store and share files. They are widely used for basic file storage and transfer needs.
B . Object storage devices are typically disk arrays.
This is incorrect. Object storage devices are not typically disk arrays in the traditional sense. Object storage is designed for massive amounts of unstructured data. While they use disks for persistence, they present data as objects with metadata, rather than as blocks or files. Object storage solutions often use distributed systems across many servers, not just a single array.
C . Block storage applies to databases that require high I/O.
This is correct. Block storage is ideal for applications that demand high I/O performance, such as databases. Block storage provides raw, unformatted data blocks, giving applications direct control and low latency.
D . Block storage typically applies to remote backup storage.
This is partially true, but not the typical primary use case. While block storage can be used for remote backups, it is generally considered less efficient and more expensive than object storage for this purpose. Object storage is better suited for large, unstructured backup datasets. Block storage is better for applications that need fast read/write speeds, such as databases and virtual machines.
Therefore, the correct answers are A and C.
Reference to Huawei Data Center Network documents:
Huawei storage product documentation detailing block storage (e.g., OceanStor Dorado), file storage, and object storage (e.g., OceanStor Pacific) characteristics and use cases.
Huawei white papers on data center storage architectures, which compare and contrast different storage types.
Huawei HCIP-Storage training materials, which will have very detailed information regarding each of the storage types, and their use cases.
NEW QUESTION # 40
Which of the following statements is false about centralized gateway deployment using BGP EVPN?
- A. When BGP EVPN is used to dynamically establish a VXLAN tunnel, the local and remote VTEPs first establish a BGP EVPN peer relationship and then exchange BGP EVPN routes to transmit VNI and VTEP IP address information. A VXLAN tunnel is then dynamically established between them.
- B. A VXLAN tunnel is identified by a pair of VTEP IP addresses and can be established if the local and remote VTEP IP addresses are reachable to each other at Layer 3.
- C. When configuring a VTEP, you need to create a Layer 2 BD and bind a VNI to the Layer 2 BD.
- D. When configuring a VTEP, you need to create an EVPN Instance in the Layer 2 BD and configure an RD for the local EVPN instance. You do not need to configure an RT.
Answer: D
Explanation:
Centralized gateway deployment using BGP EVPN in Huawei's data center networks (e.g., CloudFabric) involves a gateway handling Layer 3 routing for VXLAN overlays. Let's evaluate each statement:
A . When configuring a VTEP, you need to create a Layer 2 BD and bind a VNI to the Layer 2 BD: A Bridge Domain (BD) is a Layer 2 broadcast domain in VXLAN, and a Virtual Network Identifier (VNI) is bound to it to segment traffic. This is a standard step when configuring a VXLAN Tunnel Endpoint (VTEP) to map the overlay network. TRUE.
B . A VXLAN tunnel is identified by a pair of VTEP IP addresses and can be established if the local and remote VTEP IP addresses are reachable to each other at Layer 3: VXLAN tunnels are established between VTEPs using their IP addresses as endpoints. Layer 3 reachability (e.g., via underlay routing) is required for tunnel establishment. TRUE.
C . When BGP EVPN is used to dynamically establish a VXLAN tunnel, the local and remote VTEPs first establish a BGP EVPN peer relationship and then exchange BGP EVPN routes to transmit VNI and VTEP IP address information. A VXLAN tunnel is then dynamically established between them: In BGP EVPN, VTEPs establish a BGP peer relationship, exchange routes (e.g., Type 2 for MAC/IP or Type 3 for multicast), and share VNI and VTEP IP details, enabling dynamic tunnel setup. TRUE.
D . When configuring a VTEP, you need to create an EVPN Instance in the Layer 2 BD and configure an RD for the local EVPN instance. You do not need to configure an RT: An EVPN Instance (EVI) is created within a BD, and a Route Distinguisher (RD) is configured to make routes unique. However, Route Targets (RTs) are also required to control route import/export between EVPN peers, ensuring proper VNI and route distribution. Stating that RT configuration is not needed is incorrect, as RTs are essential for BGP EVPN operation. FALSE.
Thus, D is the false statement because RT configuration is necessary in centralized gateway deployment with BGP EVPN.
NEW QUESTION # 41
Which of the following can be deployed to enhance DC reliability? (Select All that Apply)
- A. Monitor Link
- B. Power supply redundancy
- C. M-LAG
- D. Controller cluster
Answer: B,C,D
Explanation:
Reliability in Huawei's CloudFabric data centers is enhanced through various mechanisms. Let's evaluate each option:
A . Power supply redundancy: This is true. Redundant power supplies (e.g., dual PSUs) ensure uninterrupted operation during power failures, a key reliability feature. TRUE.
B . M-LAG (Multi-Chassis Link Aggregation): This is true. M-LAG provides high availability by allowing active-active forwarding and failover between switches, enhancing network reliability. TRUE.
C . Monitor Link: This is false. Monitor Link is a Huawei feature for link status monitoring, not a direct reliability enhancement mechanism like redundancy or clustering. FALSE.
D . Controller cluster: This is true. A clustered SDN controller (e.g., iMaster NCE-Fabric) ensures high availability and failover, improving network management reliability. TRUE.
Thus, A, B, and D enhance DC reliability.
NEW QUESTION # 42
Which of the following statements is false about VM service traffic in the computing scenario?
- A. Traffic between VAS devices and service leaf nodes is VLAN encapsulated.
- B. Traffic inside a fabric is VXLAN encapsulated.
- C. Traffic between vSwitches on virtual servers and server leaf nodes is VLAN encapsulated.
- D. Inter-VPC traffic must pass through the firewall.
Answer: D
Explanation:
In Huawei's CloudFabric computing scenario, VM service traffic involves virtualized environments with VXLAN overlays and traditional VLANs. Let's evaluate each statement:
A . Traffic inside a fabric is VXLAN encapsulated: This is true. Within a CloudFabric network, VXLAN encapsulation is used to transport traffic across the fabric, enabling overlay networking for VMs. TRUE.
B . Inter-VPC traffic must pass through the firewall: This is false. Inter-VPC (Virtual Private Cloud) traffic can be routed directly between VPCs using a gateway or router (e.g., with EVPN Type 5 routes) without necessarily passing through a firewall, depending on security policies. Firewalls are optional for inter-VPC traffic, not mandatory. FALSE.
C . Traffic between VAS devices and service leaf nodes is VLAN encapsulated: This is true. Value-Added Services (VAS) devices (e.g., load balancers) often connect to service leaf nodes using VLAN encapsulation, especially in traditional or hybrid deployments. TRUE.
D . Traffic between vSwitches on virtual servers and server leaf nodes is VLAN encapsulated: This is true. Traffic from virtual switches (vSwitches) on hypervisors to physical server leaf nodes typically uses VLAN encapsulation over the physical NICs, before VXLAN overlay if applicable. TRUE.
Thus, B is the false statement because inter-VPC traffic does not always require a firewall.
NEW QUESTION # 43
Which of the following is not an advantage of link aggregation on CE series switches?
- A. Load balancing supported
- B. Improved forwarding performance of switches
- C. Improved reliability
- D. Increased bandwidth
Answer: B
Explanation:
Link aggregation, often implemented using Link Aggregation Control Protocol (LACP) on Huawei CloudEngine (CE) series switches, combines multiple physical links into a single logical link to enhance network performance and resilience. The primary advantages include:
Load Balancing Supported (B): Link aggregation distributes traffic across multiple links based on hashing algorithms (e.g., source/destination IP or MAC), improving load distribution and preventing any single link from becoming a bottleneck.
Increased Bandwidth (C): By aggregating multiple links (e.g., 1 Gbps ports into a 4 Gbps logical link), the total available bandwidth increases proportionally to the number of links.
Improved Reliability (D): If one link fails, traffic is automatically redistributed to the remaining links, ensuring continuous connectivity and high availability.
However, Improved Forwarding Performance of Switches (A) is not a direct advantage. Forwarding performance relates to the switch's internal packet processing capabilities (e.g., ASIC performance, forwarding table size), which link aggregation does not inherently enhance. While it optimizes link utilization, it doesn't improve the switch's intrinsic forwarding rate or reduce latency at the hardware level. This aligns with Huawei's CE series switch documentation, where link aggregation is described as enhancing bandwidth and reliability, not the switch's core forwarding engine.
NEW QUESTION # 44
Which of the following statements is false about VXLAN tunnel establishment?
- A. Dynamic tunnels depend on EVPN Type 5 routes to transmit information.
- B. After a tunnel is established, if one end of the tunnel goes Down, the other end may not go Down.
- C. For a static tunnel, you need to manually configure the local and remote VNIs.
- D. A VXLAN tunnel is identified by a pair of VTEPs.
Answer: A
Explanation:
VXLAN (Virtual Extensible LAN) tunnels are used to encapsulate Layer 2 traffic over a Layer 3 network, a key component in Huawei's CloudFabric data center solutions. Let's evaluate each statement:
A . A VXLAN tunnel is identified by a pair of VTEPs: This is true. A VXLAN tunnel is identified by the pair of VXLAN Tunnel Endpoint (VTEP) IP addresses (local and remote), along with the VNI (VXLAN Network Identifier). This ensures unique tunnel identification. TRUE.
B . After a tunnel is established, if one end of the tunnel goes Down, the other end may not go Down: This is true. VXLAN tunnels are unidirectional, and the status of one end does not automatically affect the other unless the underlay network connectivity (e.g., Layer 3 reachability) is lost. The remote VTEP may remain operational if it can still encapsulate/decapsulate traffic. TRUE.
C . For a static tunnel, you need to manually configure the local and remote VNIs: This is true. In a static VXLAN tunnel, administrators must manually configure the VNI and VTEP IP addresses on both ends, as there is no dynamic control plane (e.g., BGP EVPN) to automate the process. TRUE.
D . Dynamic tunnels depend on EVPN Type 5 routes to transmit information: This is false. Dynamic VXLAN tunnels rely on BGP EVPN as the control plane, but Type 5 routes (IP Prefix routes) are specifically used for advertising host IP routes and external network routes, not for general tunnel establishment. Dynamic tunnel setup primarily uses Type 2 (MAC/IP Advertisement) and Type 3 (Multicast) routes to exchange VNI and VTEP information. Type 5 routes are relevant for Layer 3 routing, not the initial tunnel setup. FALSE.
Thus, D is the false statement because dynamic tunnels depend on EVPN Type 2 and Type 3 routes, not Type 5, for initial establishment.
NEW QUESTION # 45
In the VPC interworking scenario, traffic is checked and filtered only by the firewall in the source or destination VPC.
- A. FALSE
- B. TRUE
Answer: A
Explanation:
In Huawei's CloudFabric Solution, Virtual Private Clouds (VPCs) enable isolated network environments, and interworking scenarios involve traffic between VPCs. The statement claims that traffic is checked and filtered only by the firewall in the source or destination VPC. Let's evaluate:
VPC Interworking: Traffic between VPCs can be routed via a gateway (e.g., a Layer 3 gateway or centralized router) and may involve multiple security checkpoints depending on the design. Firewalls can be deployed in the source VPC, destination VPC, or a centralized location (e.g., a service chain or border gateway).
Firewall Role: The statement implies exclusivity (only one firewall), but in practice, traffic may be filtered by firewalls at both ends, a centralized firewall, or additional security devices (e.g., VAS nodes) in the path. For example, inter-VPC traffic might pass through a firewall in the source VPC for egress filtering and another in the destination VPC for ingress filtering, or a shared firewall in a hub-and-spoke model. Huawei's security architecture (e.g., with SecoManager) supports distributed or centralized filtering, not limited to a single VPC's firewall.
The statement is FALSE (B) because traffic is not restricted to being checked and filtered only by the firewall in the source or destination VPC; multiple firewalls or security devices may be involved.
NEW QUESTION # 46
Which of the following statements are true about IP address planning for a DC? (Select All that Apply)
- A. Service addresses refer to the IP addresses of servers, hosts, and gateways.
- B. IP address allocation should be simple and easy to manage, reflect network layers, and simplify network management and network expansion.
- C. IP addresses must be contiguous. The routes with contiguous IP addresses can be summarized easily on a hierarchical network.
- D. IP addresses with a 24-bit mask are recommended for use as interconnection IP addresses.
Answer: A,B
Explanation:
IP address planning is critical in Huawei's CloudFabric data center networks to ensure scalability and efficiency. Let's evaluate each statement:
A . Service addresses refer to the IP addresses of servers, hosts, and gateways: This is true. Service addresses are assigned to endpoints (servers, hosts) and gateways, distinguishing them from management or interconnection IPs in DC planning. TRUE.
B . IP addresses with a 24-bit mask are recommended for use as interconnection IP addresses: This is false. A 24-bit mask (/24) is typically used for service subnets, while interconnection IPs (e.g., between spine and leaf) often use smaller masks (e.g., /31 or /30) to conserve addresses and align with point-to-point links. FALSE.
C . IP addresses must be contiguous. The routes with contiguous IP addresses can be summarized easily on a hierarchical network: This is false. Contiguity is desirable for summarization but not mandatory; non-contiguous blocks can still be managed with proper routing design (e.g., using BGP). FALSE.
D . IP address allocation should be simple and easy to manage, reflect network layers, and simplify network management and network expansion: This is true. Huawei recommends structured allocation (e.g., by layer or function) to streamline management and support future growth. TRUE.
Thus, A and D are true statements about IP address planning.
NEW QUESTION # 47
Which of the following protocols is used to back up session tables between the active and standby firewalls in the hot standby scenario?
- A. BFD
- B. VRRP
- C. M-LAG
- D. HRP
Answer: D
Explanation:
In a hot standby scenario, firewalls (e.g., Huawei USG series) maintain high availability by synchronizing session tables between active and standby devices to ensure seamless failover. Let's evaluate each protocol:
A . M-LAG (Multi-Chassis Link Aggregation): M-LAG is a link aggregation technology for switches, not designed for session table backup between firewalls. Incorrect.
B . VRRP (Virtual Router Redundancy Protocol): VRRP provides gateway redundancy by electing a master router, but it does not handle session table synchronization between firewalls. Incorrect.
C . BFD (Bidirectional Forwarding Detection): BFD is a fast failure detection protocol used with routing protocols, not for session table backup. Incorrect.
D . HRP (Hot Standby Redundancy Protocol): HRP is Huawei's proprietary protocol specifically designed for firewall hot standby scenarios. It synchronizes session tables, configuration data, and status information between active and standby firewalls to ensure stateful failover. Correct.
Thus, the answer is D (HRP).
NEW QUESTION # 48
A hypervisor virtualizes the following physical resources: memory, and input/output (I/O) resources. (Enter the acronym in uppercase letters.)
Answer:
Explanation:
CPU
Explanation:
A hypervisor is a software layer that creates and manages virtual machines (VMs) by abstracting physical resources from the underlying hardware. The question specifies that the hypervisor virtualizes "memory" and "input/output (I/O) resources," and the task is to provide the missing resource acronym in uppercase letters. In virtualization contexts, including Huawei's FusionCompute or OpenStack with KVM, the primary physical resources virtualized by a hypervisor are:
CPU: The central processing unit (CPU) is virtualized to allocate processing power to VMs, enabling multi-tenancy and workload isolation.
Memory: Virtualized to provide RAM allocation to VMs, abstracted via memory management units (MMUs).
I/O Resources: Input/output resources (e.g., NICs, disks) are virtualized to allow VMs to communicate and store data, often through virtual NICs (vNICs) or virtual disks.
The question lists "memory" and "I/O resources" explicitly, implying the missing resource is CPU, as it completes the standard triad of virtualized resources in hypervisor design. Thus, the answer is CPU.
NEW QUESTION # 49
Which of the following statements is false about M-LAG deployment?
- A. Multi-level M-LAG is mainly used to construct a large Layer 2 network in a DCN or directly connect DCNs at Layer 2.
- B. In multi-level M-LAG networking, you can manually configure the root bridge to prevent STP loops.
- C. M-LAG networking can be classified into single-level M-LAG networking and multi-level M-LAG networking.
- D. Multi-level M-LAG must be configured based on V-STP.
Answer: D
Explanation:
M-LAG (Multi-Chassis Link Aggregation) on Huawei CE series switches enhances high availability and load balancing by making two switches appear as one. Let's evaluate each statement:
A . Multi-level M-LAG is mainly used to construct a large Layer 2 network in a DCN or directly connect DCNs at Layer 2: This is true. Multi-level M-LAG extends the topology across multiple layers or data centers, facilitating large Layer 2 domains, a common use case in Huawei DCNs. TRUE.
B . In multi-level M-LAG networking, you can manually configure the root bridge to prevent STP loops: This is true. Manual configuration of the root bridge (e.g., using STP priority) is supported to optimize path selection and prevent loops, especially in complex M-LAG setups. TRUE.
C . Multi-level M-LAG must be configured based on V-STP: This is false. While V-STP can be used to prevent loops, M-LAG does not require V-STP specifically. Standard STP, RSTP, or MSTP can also be configured, depending on the network design. The requirement is loop prevention, not a mandatory V-STP dependency. FALSE.
D . M-LAG networking can be classified into single-level M-LAG networking and multi-level M-LAG networking: This is true. Single-level M-LAG connects two switches directly to devices, while multi-level M-LAG extends across additional layers or devices, a recognized classification in Huawei documentation. TRUE.
Thus, C is the false statement because multi-level M-LAG does not mandate V-STP configuration.
NEW QUESTION # 50
Which of the following servers are built into iMaster NCE-Fabric to provide related services? (Select All that Apply)
- A. Version file server
- B. DNS server
- C. DHCP server
- D. RADIUS authentication server
Answer: A,C
Explanation:
Huawei's iMaster NCE-Fabric is an SDN controller for the CloudFabric Solution, providing network orchestration and management. It includes built-in servers to support its operations. Let's evaluate each option:
A . DNS server: This is false. iMaster NCE-Fabric does not include a built-in DNS server; it relies on external DNS services for name resolution, configured during deployment. FALSE.
B . RADIUS authentication server: This is false. RADIUS authentication is typically handled by external AAA servers; iMaster NCE-Fabric integrates with them but does not embed a RADIUS server. FALSE.
C . DHCP server: This is true. iMaster NCE-Fabric includes a built-in DHCP server to assign temporary IP addresses during Zero Touch Provisioning (ZTP) or initial device configuration. TRUE.
D . Version file server: This is true. A version file server is built into iMaster NCE-Fabric to store and deliver software images or configuration files for device upgrades and management. TRUE.
Thus, C (DHCP server) and D (Version file server) are built into iMaster NCE-Fabric.
NEW QUESTION # 51
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. Northbound management plane
- B. Internal communication plane
- C. Southbound service plane
- D. BGP microservice plane
Answer: A,B,C
Explanation:
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.
NEW QUESTION # 52
In Huawei CloudFabric Solution, OSPF or BGP can be used on the underlay network of a DC.
- A. TRUE
- B. FALSE
Answer: A
Explanation:
In Huawei's CloudFabric Solution, the underlay network provides the physical infrastructure for VXLAN overlays. Both OSPF (Open Shortest Path First) and BGP (Border Gateway Protocol) are supported routing protocols:
OSPF: Suitable for smaller to medium-sized DCNs, offering fast convergence and simplicity.
BGP: Preferred for large-scale DCNs, providing scalability and multi-tenancy support (e.g., EBGP for inter-AS or iBGP for intra-DC).
Huawei documentation confirms flexibility in choosing OSPF or BGP based on network size and requirements. The statement is TRUE (A).
NEW QUESTION # 53
In the computing scenario of Huawei CloudFabric Solution, which of the following services are optional for controller interconnection? (Select All that Apply)
- A. Interconnection with the authentication server
- B. Interconnection with eSight
- C. Interconnection with the VMM
- D. Interconnection with FabricInsight
Answer: B,D
Explanation:
In Huawei's CloudFabric Solution, the iMaster NCE-Fabric controller manages the network in computing scenarios (e.g., virtualized environments). Controller interconnection with external systems can be mandatory or optional depending on functionality. Let's evaluate each option:
A . Interconnection with FabricInsight: This is optional. FabricInsight is an analytics and assurance tool that enhances visibility and troubleshooting but is not required for basic controller operations in the computing scenario. OPTIONAL.
B . Interconnection with the authentication server: This is mandatory. Authentication servers (e.g., RADIUS, TACACS+) are essential for securing access to the controller and managed devices, a core requirement in computing scenarios. NOT OPTIONAL.
C . Interconnection with eSight: This is optional. eSight is a network management platform that provides additional monitoring and management capabilities, but it is not necessary for core controller functionality. OPTIONAL.
D . Interconnection with the VMM (Virtual Machine Manager): This is mandatory. Interconnection with a VMM (e.g., FusionCompute, OpenStack) is required to manage virtualized computing resources and orchestrate network services in the computing scenario. NOT OPTIONAL.
Thus, A (Interconnection with FabricInsight) and C (Interconnection with eSight) are optional services for controller interconnection.
NEW QUESTION # 54
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