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NEW QUESTION # 78
In the spine-leaf DCN architecture, the border leaf node and service leaf node can be deployed on the same device.
Answer: A
Explanation:
In Huawei's spine-leaf data center network (DCN) architecture, the topology consists of spine nodes (core) and leaf nodes (access/aggregation). Leaf nodes can serve different roles:
Border Leaf Node: Connects the DCN to external networks or other domains, handling Layer 3 routing.
Service Leaf Node: Connects to internal services (e.g., servers, VMs), often handling Layer
2/Layer 3 traffic.
In practice, a single physical device can be configured to perform both roles (border and service) if it has the necessary interfaces and routing capabilities. Huawei's CloudFabric documentation supports this flexibility, allowing a leaf switch to act as both a border and service node based on configuration (e.g., using VRFs or VXLAN gateways). This reduces hardware costs and simplifies deployment in smaller DCNs.
The statement is TRUE (A) because the border leaf and service leaf roles can be deployed on the same device in a spine-leaf architecture.
NEW QUESTION # 79
During deployment of an EVPN VXLAN fabric, the operations team wants remote VTEPs to discover BUM replication information without using multicast routing. Which EVPN route type distributes this information between participating VTEPs?
Answer: C
Explanation:
Type 3 Inclusive Multicast Ethernet Tag routes advertise VTEP participation for BUM traffic handling. They allow ingress replication without relying on an underlay multicast network. Type 2 advertises endpoint information, while Types 1 and 5 serve different EVPN purposes.
NEW QUESTION # 80
In the VPC interworking scenario, traffic is checked and filtered only by the firewall in the source or destination VPC.
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 # 81
In the DCN architecture, spine nodes connect various network devices to the VXLAN network.
Answer: A
Explanation:
In Huawei's Data Center Network (DCN) architecture, particularly with the CloudFabric solution, the spine-leaf topology is a common design for scalable and efficient data centers. VXLAN (Virtual Extensible LAN) is used to create overlay networks, enabling large-scale multi-tenancy and flexible workload placement.
Spine Nodes' Role: In this architecture, spine nodes act as the backbone, interconnecting leaf nodes (which connect to servers, storage, or other endpoints) and facilitating high-speed, non-blocking communication. Spine nodes typically handle Layer 3 routing and serve as VXLAN tunnel endpoints (VTEPs) or connect to devices that do, integrating the physical underlay with the VXLAN overlay network.
Connection to VXLAN: Spine nodes ensure that traffic from various network devices (via leaf nodes) is routed efficiently across the VXLAN fabric. They provide the high-bandwidth, low-latency backbone required for east-west traffic in modern data centers, supporting VXLAN encapsulation and decapsulation indirectly or directly depending on the deployment.
Thus, the statement is TRUE (A) because spine nodes play a critical role in connecting the underlay network (various devices via leaf nodes) to the VXLAN overlay, as per Huawei's DCN design principles.
NEW QUESTION # 82
Which of the following statements are true about the tenant service model? (Select All that Apply)
Answer: B,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 # 83
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