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| Section | Objectives |
|---|---|
| SDN and Network Automation | - Software Defined Networking
|
| Data Center Routing | - Routing Protocols in DC Environment
|
| Data Center Network Fundamentals | - Data Center Architecture Overview
|
| O&M and Troubleshooting | - Operations and Maintenance
|
| Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| VXLAN Technology | - Overlay Networking
|
| Network Security and Reliability | - Data Center Security Mechanisms
|
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NEW QUESTION # 66
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 # 67
How many rollback levels does Huawei's iMaster NCE-Fabric support?
Answer: A
Explanation:
Huawei's iMaster NCE-Fabric is an SDN controller for the CloudFabric data center network solution, providing network management and automation. The rollback feature allows administrators to revert configuration changes to previous states in case of errors. According to Huawei's documentation, iMaster NCE-Fabric supports four rollback levels, enabling the system to store and restore up to four previous configuration versions. This ensures flexibility in undoing changes during network management tasks like upgrades or policy adjustments.
Options Analysis:
A . 3: Incorrect, as it underestimates the supported levels.
B . 4: Correct, aligning with Huawei's specified rollback capability.
C . 2: Incorrect, as it is fewer than the supported levels.
D . 1: Incorrect, as it limits rollback to a single state, which is insufficient for complex management.
Thus, the answer is B (4).
NEW QUESTION # 68
In network overlay, both endpoints of a VXLAN tunnel are physical switches.
Answer: A
Explanation:
In a network overlay, VXLAN (Virtual Extensible LAN) tunnels extend Layer 2 networks over a Layer 3 underlay, commonly implemented in Huawei's data center solutions. The endpoints of a VXLAN tunnel are VXLAN Tunnel Endpoints (VTEPs), which encapsulate and decapsulate traffic.
VTEP Roles: VTEPs can be physical switches (e.g., Huawei CloudEngine series), virtual switches (e.g., Open vSwitch on a hypervisor), or routers with VXLAN support. The endpoints are defined by their IP addresses, not their physical nature.
Deployment Flexibility: In modern data centers, VXLAN tunnels often connect physical switches to virtualized environments where VTEPs reside on hypervisors or servers hosting VMs. For example, a VM's vNIC might connect to a virtual switch (VTEP) that tunnels to a physical switch VTEP. Thus, both endpoints are not always physical switches; one or both can be virtual.
The statement is FALSE (B) because both endpoints of a VXLAN tunnel are not necessarily physical switches; they can include virtual VTEPs in hypervisors or other devices.
NEW QUESTION # 69
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.
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 # 70
A company designs a modern Huawei data center emphasizing automation, scalability, and simplified operations. Which architecture best aligns with these objectives?
Answer: A
Explanation:
A spine-leaf EVPN VXLAN architecture provides scalable Layer 3 forwarding, tenant isolation, efficient ECMP load balancing, workload mobility, and centralized control-plane learning. These characteristics make it the preferred architecture for modern cloud-oriented data center deployments.
NEW QUESTION # 71
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