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| Section | Objectives |
|---|---|
| Topic 1: Data Center Routing | - Routing Protocols in DC Environment
|
| Topic 2: Data Center Network Fundamentals | - Data Center Architecture Overview
|
| Topic 3: SDN and Network Automation | - Software Defined Networking
|
| Topic 4: VXLAN Technology | - Overlay Networking
|
| Topic 5: O&M and Troubleshooting | - Operations and Maintenance
|
| Topic 6: Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| Topic 7: Network Security and Reliability | - Data Center Security Mechanisms
|
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NEW QUESTION # 50
A tenant experiences intermittent communication after duplicate MAC addresses appear on different leaf switches. Which EVPN capability is designed to detect such situations?
Answer: C
Explanation:
EVPN includes MAC mobility procedures that recognize endpoint movement and detect conflicting advertisements. Sequence numbers help determine the latest valid location, reducing forwarding inconsistencies caused by duplicate MAC announcements.
NEW QUESTION # 51
Which of the following statements are true about IP address planning for a DC? (Select All that Apply)
Answer: B,D
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 # 52
In the VPC interworking scenario, traffic is checked and filtered only by the firewall in the source or destination VPC.
Answer: B
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 # 53
Which of the following statements is false about VM service traffic in the computing scenario?
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 # 54
Which of the following O&M functions are supported in Huawei CloudFabric Solution? (Select All that Apply)
Answer: B,C,D
Explanation:
Huawei's CloudFabric Solution, managed by iMaster NCE-Fabric, provides robust Operations and Maintenance (O&M) capabilities. Let's evaluate each option:
A). Multi-path detection: This is true. CloudFabric supports multi-path detection (e.g., using ECMP) to verify load balancing and path diversity in the network. TRUE.
B). Network connectivity detection, such as IP ping and MAC ping: This is true. Tools like IP ping and MAC ping are supported for troubleshooting connectivity between devices and endpoints.
TRUE.
C). Single-path detection: This is false. While multi-path detection is supported, single-path detection is not a distinct O&M function; connectivity checks typically involve multiple paths or end-to-end verification. FALSE.
D). Visualization of entries (MAC/IP) on logical routers and switches: This is true. CloudFabric provides visualization of MAC and IP entries on logical network elements, aiding in network management and troubleshooting. TRUE.
Thus, A, B, and D are supported O&M functions.
NEW QUESTION # 55
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