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| Section | Objectives |
|---|---|
| Topic 1: Network Security and Reliability | - Data Center Security Mechanisms
|
| Topic 2: Data Center Network Fundamentals | - Data Center Architecture Overview
|
| Topic 3: Data Center Routing | - Routing Protocols in DC Environment
|
| Topic 4: O&M and Troubleshooting | - Operations and Maintenance
|
| Topic 5: VXLAN Technology | - Overlay Networking
|
| Topic 6: Data Center Switching Technologies | - Ethernet Switching in Data Centers
|
| Topic 7: SDN and Network Automation | - Software Defined Networking
|
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NEW QUESTION # 69
Which of the following operations need to be performed before deployment in Easy mode?
(Select All that Apply)
Answer: B,D
Explanation:
The Easy mode in Huawei's iMaster NCE-Fabric simplifies VXLAN fabric deployment with automated configuration. Certain pre-deployment steps are required. Let's evaluate each option:
A). Disable data synchronization upon going online for the first time: This is false. Data synchronization is typically enabled by default to ensure consistency; disabling it is not a standard pre-deployment step and is optional based on specific needs. FALSE.
B). Load the license: This is true. A valid license must be loaded into iMaster NCE-Fabric before deployment to unlock features, including Easy mode functionality. TRUE.
C). Pre-configure the access ports: This is true. Access ports on devices (e.g., server leaf nodes) need to be pre-configured (e.g., with VLANs or basic settings) to ensure connectivity before Easy mode automation begins. TRUE.
D). Configure an SSH fingerprint verification policy: This is false. SSH fingerprint verification is part of security configuration but is not a mandatory pre-deployment step for Easy mode; it can be set post- deployment or is automated. FALSE.
Thus, B (Load the license) and C (Pre-configure the access ports) are required operations before deployment in Easy mode.
NEW QUESTION # 70
How many rollback levels does Huawei's iMaster NCE-Fabric support?
Answer: C
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 # 71
Which underlay characteristic is most important for ensuring reliable VXLAN overlay communication across a spine-leaf fabric?
Answer: C
Explanation:
VXLAN relies entirely on an IP underlay. Every VTEP must reach every other VTEP through stable IP routing. Layer 2 mechanisms such as STP or native VLAN settings are not primary overlay requirements.
NEW QUESTION # 72
Which of the following technologies are Layer 4 load balancing technologies? (Select All that Apply)
Answer: A,C,D
Explanation:
Layer 4 load balancing operates at the transport layer (OSI Layer 4), using TCP/UDP protocols to distribute traffic based on information like IP addresses and port numbers, without inspecting the application-layer content (Layer 7). Let's evaluate each option:
A). Nginx: Nginx is a versatile web server and reverse proxy that supports both Layer 4 and Layer
7 load balancing. In its Layer 4 mode (e.g., with the stream module), it balances TCP/UDP traffic, making it a Layer 4 load balancing technology. This is widely used in Huawei's CloudFabric DCN solutions for traffic distribution. TRUE.
B). PPP (Point-to-Point Protocol): PPP is a Layer 2 protocol used for establishing direct connections between two nodes, typically in WAN scenarios (e.g., dial-up or VPNs). It does not perform load balancing at Layer 4 or any layer, as it's a point-to-point encapsulation protocol.
FALSE.
C). LVS (Linux Virtual Server): LVS is a high-performance, open-source load balancing solution integrated into the Linux kernel. It operates at Layer 4, using techniques like NAT, IP tunneling, or direct routing to distribute TCP/UDP traffic across backend servers. It's a core Layer 4 technology in enterprise DCNs. TRUE.
D). HAProxy: HAProxy is a high-availability load balancer that supports both Layer 4 (TCP mode) and Layer 7 (HTTP mode). In TCP mode, it balances traffic based on Layer 4 attributes, making it a Layer 4 load balancing technology. It's commonly deployed in Huawei DCN environments.
TRUE.
Thus, A (Nginx), C (LVS), and D (HAProxy) are Layer 4 load balancing technologies. PPP is not.
NEW QUESTION # 73
Which of the following statements are true about the Easy mode? (Select All that Apply)
Answer: A,B,C
Explanation:
The Easy mode in Huawei's iMaster NCE-Fabric simplifies network deployment for basic VXLAN fabrics. Let's evaluate each statement:
A). This mode has low networking requirements: This is true. Easy mode is designed for simple topologies (e.g., small spine-leaf networks) with minimal configuration complexity. TRUE.
B). iMaster NCE-Fabric automatically generates configuration script files: This is true. Easy mode automates script generation based on user inputs, reducing manual effort. TRUE.
C). On iMaster NCE-Fabric, you need to manually create and configure fabric resource pools, managed devices, device groups, device roles, tenants, and VPCs one by one in the Configuration Wizard menu: This is false. Easy mode automates these tasks, minimizing manual configuration compared to advanced modes. FALSE.
D). Layer 2 and Layer 3 basic services in a VPC are orchestrated on the Easy page: This is true.
Easy mode supports automated orchestration of L2 (e.g., BDs) and L3 (e.g., gateways) services within a VPC. TRUE.
Thus, A, B, and D are true statements about Easy mode.
NEW QUESTION # 74
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