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| Section | Weight | Objectives |
|---|---|---|
| CloudFabric Data Center Network Solution Overview | 10% | - CloudFabric Solution Components and Functions - Data Center Network Challenges and Trends - Huawei CloudFabric Solution Architecture |
| CloudEngine Switch Configuration | 20% | - QinQ and VLAN Extension Technologies - BGP EVPN Configuration - VXLAN Configuration on CloudEngine - CloudEngine OS Overview |
| Data Center Network Security and O&M | 10% | - Network Troubleshooting Methods - iMaster NCE-FabricInsight Analytics - Traffic Audit and Monitoring - Network Security Policies |
| Underlying Transport Network Technologies | 15% | - Underlay Network Planning and Design - Spine-Leaf Architecture - Overlay Network Technologies (VXLAN, NVGRE) |
| iMaster NCE-Fabric Management | 15% | - Underlay Network Automation Deployment - Overlay Network Configuration - Network Simulation and Verification - Fabric Management Concepts |
| Data Center Interconnect | 10% | - EVPN Multi-Site Solution - Cross-Domain VXLAN Extension - DCI Technology Overview |
| VXLAN and EVPN Technologies | 20% | - BGP EVPN Fundamentals - VXLAN Principles and Deployment - Multi-Site VXLAN EVPN Deployment - EVPN Route Types and Applications |
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NEW QUESTION # 42
Which of the following protocols is used to back up session tables between the active and standby firewalls in the hot standby scenario?
Answer: C
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 # 43
An engineer configures anycast gateways on every leaf switch. Which benefit is achieved for attached virtual machines?
Answer: B
Explanation:
Anycast gateways allow hosts to use the same default gateway IP and MAC throughout the VXLAN fabric. Workloads can move between racks without changing gateway settings, simplifying mobility and reducing traffic tromboning.
NEW QUESTION # 44
Which of the following statements are true about the tenant service model? (Select All that Apply)
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 # 45
In the DCN architecture, spine nodes connect various network devices to the VXLAN network.
Answer: B
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 # 46
Which of the following statements are true about common storage types used by enterprises?
Answer: C,D
Explanation:
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.
NEW QUESTION # 47
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