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Huawei HCSP-Presales-Data Center Network Planning and Design V1.0 Sample Questions:

1. Which of the following nodes allows tenant access to a VXLAN network and intra-subnet communication on the network?

A) Default VXLAN gateway
B) Layer 2 VXLAN gateway
C) Layer 3 VXLAN gateway
D) Centralized VXLAN gateway

2. Which of the following is not an advantage of the distributed VXLAN gateway networking?

A) Inter-subnet traffic can be centrally managed, and gateway deployment and management are simple.
B) Leaf nodes only need to learn the ARP entries of the servers connected to them, reducing resource consumption.
C) A single device does not need to learn the ARP entries of all servers, and the network scalability is improved.
D) A leaf node can function as both a Layer 2 VXLAN gateway and a Layer 3 VXLAN gateway, supporting flexible deployment.

3. Which of the following are characteristics of distributed VXLAN gateways?

A) The number of ARP entries supported is a bottleneck. A single Layer 3 gateway is used. For tenants whose traffic is forwarded by the Layer 3 gateway, ARP entries must be generated for the tenants on the Layer 3 gateway, but only a limited number of ARP entries are allowed by the Layer 3 gateway, which impedes data center network expansion.
B) Forwarding paths are not optimal. Inter-subnet Layer 3 traffic between devices connected to the same gateway in a data center must be transmitted to a unified Layer 3 gateway for forwarding.
C) A distributed VXLAN gateway (leaf node) only needs to learn the ARP entries of servers connected to it, whereas a centralized Layer 3 VXLAN gateway needs to learn the ARP entries of all servers on a network. Therefore, the number of ARP entries supported is no longer a bottleneck on distributed VXLAN gateways, and the network scalability is improved.
D) A leaf node can function as both a Layer 2 VXLAN gateway and a Layer 3 VXLAN gateway, supporting flexible deployment.

4. (Reliability design is important for the physical network design of a data center. Which of the following are true about reliability design principles?)

A) Peer-link fault: When the peer-link in an M-LAG fails, the DAD mechanism prevents dual master devices on the network and improves reliability.
B) Uplink reliability of leaf nodes: ECMP is implemented between leaf and spine nodes through multiple links.
C) When modular switches are deployed on the network, the inter-card connection is recommended for uplinks and downlinks, stack link, and peer-link of modular switches to implement card-level reliability.
D) Server link reliability: One server is dual-homed to two server leaf nodes, and NICs on a server work in load balancing or active/standby mode. If one server link fails, services are switched to the redundant or standby link.

5. To facilitate resource pooling and management in a data center, the data center is divided into one or more physical partitions, known as points of delivery (PoDs).

A) FALSE
B) TRUE

Solutions: