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| Section | Objectives |
|---|---|
| Network Security and Reliability | - Data Center Security Mechanisms
|
| VXLAN Technology | - Overlay Networking
|
| O&M and Troubleshooting | - Operations and Maintenance
|
| Data Center Routing | - Routing Protocols in DC Environment
|
| SDN and Network Automation | - Software Defined Networking
|
| Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| Data Center Network Fundamentals | - Data Center Architecture Overview
|
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NEW QUESTION # 35
Which of the following is not included in the physical architecture of a server?
Answer: A
Explanation:
The physical architecture of a server refers to the tangible and low-level components that constitute the server itself, distinct from logical or software layers. Let's evaluate each option:
A). Application: Applications are software running on top of an operating system or virtual machine, not part of the server's physical architecture. They belong to the logical or user layer, not the physical structure. Not Included.
B). VMmonitor (Hypervisor): Assuming "VMmonitor" refers to a hypervisor (e.g., KVM or Xen), it's a software layer, but in Type-1 hypervisor scenarios, it runs directly on hardware, managing VMs.
In Huawei's context, it's considered part of the server's operational architecture when deployed physically. Included.
C). OS (Operating System): The OS (e.g., Linux, Windows) runs directly on server hardware or within a VM. In bare-metal servers, it's a core component of the physical deployment. Included.
D). Hardware: Hardware (e.g., CPU, RAM, NICs, disks) is the foundational physical architecture of a server, providing the physical resources for all operations. Included.
Thus, A (Application) is not part of the physical architecture, as it's a higher-level software entity, not a physical component.
NEW QUESTION # 36
Which of the following technologies are open-source virtualization technologies? (Select All that Apply)
Answer: A,D
Explanation:
Virtualization technologies enable the creation of virtual machines (VMs) by abstracting hardware resources. Open-source technologies are freely available with accessible source code. Let's evaluate each option:
A . Hyper-V: Hyper-V is a hypervisor developed by Microsoft, integrated into Windows Server and available as a standalone product. It is proprietary, not open-source, as its source code is not publicly available. Not Open-Source.
B . Xen: Xen is an open-source hypervisor maintained by the Xen Project under the Linux Foundation. It supports multiple guest operating systems and is widely used in cloud environments (e.g., Citrix XenServer builds on it). Its source code is freely available. Open-Source.
C . FusionSphere: FusionSphere is Huawei's proprietary virtualization and cloud computing platform, based on OpenStack and other components. While it integrates open-source elements (e.g., KVM), FusionSphere itself is a commercial product, not fully open-source. Not Open-Source.
D . KVM (Kernel-based Virtual Machine): KVM is an open-source virtualization technology integrated into the Linux kernel. It turns Linux into a Type-1 hypervisor, and its source code is available under the GNU General Public License. It's widely used in Huawei's virtualization solutions. Open-Source.
Thus, B (Xen) and D (KVM) are open-source virtualization technologies.
NEW QUESTION # 37
Which of the following statements are false about heartbeat link faults in an M-LAG? (Select All that Apply)
Answer: C,D
Explanation:
In Huawei's M-LAG (Multi-Chassis Link Aggregation), the heartbeat link (or peer-link) ensures communication between member devices. A fault in this link can impact M-LAG operation. Let's evaluate each statement:
A . The fault that two master devices exist cannot be detected in the case of a peer-link fault: This is false. A peer-link fault can be detected, and mechanisms like dual-master detection (e.g., via Inter-Chassis Communication Link or ICC) can identify if both devices assume master roles, triggering corrective actions. FALSE.
B . An alarm is triggered: This is true. A peer-link fault generates an alarm to notify administrators, as it's a critical failure in M-LAG operation, per Huawei's fault management system. TRUE.
C . The fault protection mechanism is triggered: This is true. Huawei M-LAG includes protection mechanisms (e.g., failover to backup links or shutdown of conflicting interfaces) to mitigate peer-link faults and maintain service continuity. TRUE.
D . Services are affected: This is false. With proper configuration (e.g., redundant links or fast failover), services should not be affected by a peer-link fault, as M-LAG is designed for high availability. Impact depends on redundancy, but the design goal is uninterrupted service. FALSE.
Thus, A and D are false statements because dual-master faults can be detected, and services are not necessarily affected with adequate redundancy.
NEW QUESTION # 38
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 # 39
A VXLAN tunnel is identified by a pair of VTEP IP addresses. During VXLAN tunnel establishment, the local and remote VTEPs attempt to obtain each other's IP addresses. If the VTEP IP addresses are reachable to each other at Layer 3, a VXLAN tunnel can be established.
Answer: B
Explanation:
VXLAN (Virtual Extensible LAN) tunnels are used to encapsulate Layer 2 traffic over a Layer 3 network, a key feature in Huawei's data center solutions. The endpoints of a VXLAN tunnel are VXLAN Tunnel Endpoints (VTEPs), identified by their IP addresses.
Tunnel Identification: A VXLAN tunnel is uniquely identified by the pair of VTEP IP addresses (local and remote), along with the VNI (VXLAN Network Identifier). This pair ensures the tunnel is specific to the communication path between the two VTEPs.
Tunnel Establishment: During setup, VTEPs exchange information to learn each other's IP addresses. This can occur manually (static configuration) or dynamically (e.g., via BGP EVPN).
The underlay network must provide Layer 3 reachability between the VTEP IP addresses, typically using routing protocols (e.g., OSPF, BGP) to ensure IP connectivity.
Reachability Condition: If the local and remote VTEP IP addresses are reachable at Layer 3, the tunnel can be established, allowing encapsulation and decapsulation of VXLAN traffic. This is a fundamental requirement in Huawei's VXLAN implementation.
The statement is TRUE (A) because a VXLAN tunnel's identification and establishment depend on reachable VTEP IP address pairs at Layer 3.
NEW QUESTION # 40
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