Huawei H19-301_V3.0 - HCSA-Presales-IP Network Certification V3.0

Huawei iMaster NCE-Fabricis anAI-powered SDN controllerfordata center networks, offeringautomated rollback functionsto prevent misconfigurations.

(A) Tenant-Level Rollback (True):Allows rollback oftenant-specific configurations, ensuring isolation between network tenants.

(B) Service-Level Rollback (True):Enables rollback of individualnetwork serviceswithout affecting other operations.

(C) Network-Wide Rollback (True):Provides afull network rollbackto a previous stable state.

(D) Application-Level Rollback (False):Not a feature of iMaster NCE-Fabric; applications operate independently of network configuration rollback.

📖Reference:HCSA-Presales-IP Network Official Study Guide, iMaster NCE-Fabric Rollback Functions

Huawei's datacom portfolio includes the "Four Engines," which represent key product lines for different networking domains:

NetEngine:High-performance routers for enterprise WAN and data center interconnects.

CloudEngine:Data center switches designed for high-density, low-latency environments.

AirEngine:Wireless access points (APs) for Wi-Fi 6 and beyond.

HiSecEngine:Security products, including firewalls and intrusion prevention systems.

The optionAREnginedoes not belong to the "Four Engines" lineup. It appears to be unrelated to Huawei's official datacom product categories.

VXLAN (Virtual Extensible LAN) is a network virtualization technology that addresses the limitations of traditional VLANs and MAC address tables by enabling large-scale Layer 2 networks over Layer 3 infrastructure. It is particularly useful in data centers with a growing number of virtual machines (VMs).

Among the options provided:

CE6881 : This switch supports VXLAN and is designed for high-density data center environments. It provides excellent scalability and performance for VXLAN-based networks, making it the most suitable choice.

CE9860 : While this switch is a high-end model, it is primarily used for core or aggregation layers and may not be the best fit for VXLAN at the access layer.

CE6820 : This switch does not support VXLAN, making it unsuitable for the scenario.

CE5882 : This is an older model and lacks the advanced features required for modern VXLAN deployments.

Thus, the correct answer is A , as the CE6881 is the most appropriate model for VXLAN scenarios.

While Huawei is a major contributor to the development of Wi-Fi standards and actively participates in IEEE 802.11 working groups, it does not serve as the chair of the802.11ax Working Group. The 802.11ax standard, also known as Wi-Fi 6, was developed under the leadership of the IEEE 802.11 working group, with contributions from multiple vendors and organizations.Huawei has played a significant role in advancing Wi-Fi technologies, but the claim that it chairs the 802.11ax Working Group is incorrect.

Huawei firewalls, particularly the USG series, have consistently demonstrated strong performance in terms of innovation, functionality, and market presence. As a result, they have been included in the Gartner Magic Quadrant for Network Firewalls every year since 2013, achieving recognition for nine consecutive years.

This consistent inclusion reflects Huawei's leadership in the firewall market and its ability to meet evolving customer requirements.

Thus, the statement is TRUE .

Comprehensive and Detailed in Depth Explanation:Huawei's wireless backhaul solution for rail transportation is designed to provide high reliability and low latency for mission-critical applications such as train control systems.

Option A: The handover delay in Huawei's solution can indeed be as low as 30 ms. This ensures seamless connectivity during transitions between base stations, which is crucial for real-time applications like train control signaling.

Option B: The solution supports carrying train control signal systems, ensuring safe and efficient operations.

Option C: This statement is incorrect. Huawei's wireless backhaul solution supports high-speed mobility, including trains traveling at speeds up to 160 km/h or higher, without losing connectivity.

Option D: Active-active links are a key feature of the solution, providing redundancy and ensuring high reliability even in challenging environments.

Overview of Audio and Video Service Assurance:

Huawei provides advanced mechanisms to ensure high-quality audio and video services in wireless networks, even under congestion.

Analysis of Each Statement:

Option A:This is incorrect. The correct default priority order isVI -> VO -> BE -> BK(Voice > Video > Best Effort > Background).

Option B:This is correct. Beacon frames can be used to instruct APs to suppress heavy-traffic users, ensuring fair resource allocation.

Option C:This is correct. Huawei's lab tests show that delays for voice and video services in congestion scenarios are56% lowerthan the industry average.

Option D:This is correct. The default scheduling priority order isVI -> VO -> BE -> BK.

Option E:This is incorrect. Heavy-traffic services are not automatically suppressed; suppression requires explicit configuration.

Conclusion:The correct statements are Options B, C, and D.

The Huawei datacom product line is indeed designed to cover six key domains:

Campus Network : Solutions for enterprise campus networks, including switches, Wi-Fi, and IoT integration.

Metro Router : Products tailored for metropolitan area networks (MANs), enabling high-speed connectivity in urban areas.

Data Center Network : Advanced solutions for modern data centers, including CloudFabric and AI Fabric.

Cyber Security : Comprehensive security solutions, including firewalls, intrusion detection/prevention systems (IDS/IPS), and anti-DDoS products.

Network Management : Tools and platforms for managing and monitoring networks, such as iMaster NCE.

Backbone Router : High-performance routers for core networks, supporting large-scale data transmission across regions.

This categorization reflects Huawei's commitment to providing end-to-end networking solutions across various domains. The statement is therefore TRUE .

Overview of Huawei CloudFabric Easy Solution:

Huawei CloudFabric Easy Solution is designed to simplify data center networking through automation, ease of use, and scalability. Its key highlights are summarized under the acronym "EASY."

Explanation of Each Highlight:

EasY-Maintenance:The solution simplifies network operations and maintenance, reducing complexity and operational costs.

Expandability:While expandability is important, it is not one of the four "EASY" highlights explicitly mentioned in the official documentation.

Simplification:The solution focuses on simplifying network deployment, configuration, and management.

Easy Sales:This is not part of the "EASY" highlights. The term refers to technical benefits rather than sales processes.

Automation:The solution leverages automation to streamline tasks such as provisioning, monitoring, and troubleshooting.

Conclusion:The four highlights of Huawei CloudFabric Easy Solution are EasY-Maintenance, Simplification, and Automation.

Option A:In traditional IP routing, each router in the network must maintain a routing table that contains network-wide routes or at least the routes relevant to its operation. This ensures that packets can be forwarded correctly to their destination.

Option B:Traditional IP routing operates on the principle of the "longest match rule." When a router receives a packet, it examines the destination IP address and matches it against the entries in its routing table. The longest prefix match determines the next hop for the packet.

Option C:Traditional IP networks are inherently connectionless, meaning there is no dedicated path established between the source and destination before data transmission. This lack of connection-oriented mechanisms makes it challenging to guarantee Quality of Service (QoS) across the entire network.

Option D:In traditional IP networks, packets are forwarded using a hop-by-hop mechanism. Each router along the path decapsulates the packet, inspects its headers, and forwards it to the next hop based on its routing table.