H19-301_V3.0 Huawei HCSA-Presales-IP Network Certification V3.0 Free Practice Exam Questions (2025 Updated)

Huawei'sdata center autonomous driving networkis classified asL3: conditional autonomous network. This level represents a significant advancement in network automation, where the system can handle most tasks autonomously but still requires human oversight for complex or exceptional scenarios.The levels of autonomous driving networks are defined as follows:

L0:Fully manual operations with no automation.

L1:Basic automation with assisted O&M tools.

L2:Partial autonomy, where some tasks are automated.

L3:Conditional autonomy, enabling self-driving capabilities under specific conditions.

L4:High autonomy, capable of handling nearly all tasks without human intervention.

Huawei's L3 implementation ensures efficient and reliable operations while maintaining flexibility for human intervention when needed.

Huawei'sCloudFabric 3.0is a next-generation data center network solution with several key differentiators:

Full-lifecycle automation:Automates tasks across the entire lifecycle, from deployment to operations, reducing manual intervention and errors.

Network-wide intelligent O&M:Leverages AI to provide real-time monitoring, fault prediction, and optimization, enhancing reliability and efficiency.

All-Ethernet storage and HPC network:Supports converged Ethernet-based storage and high-performance computing (HPC), eliminating the need for separate Fibre Channel networks.

Whileall-wireless accessis a feature of campus networks, it is not a differentiator of CloudFabric 3.0, which focuses on wired data center networks.

TheUSG6000E-Bfirewall doesnotsupport hardware bypass by default. If hardware bypass functionality is required, anexternal bypass devicemust be purchased and configured.Hardware bypass ensures network continuity in case of a firewall failure by physically rerouting traffic around the device. Since this feature is not included by default in the USG6000E-B, additional hardware is necessary to achieve it.

Dynamic Routing Protocols Overview:

Dynamic routing protocols enable routers to exchange routing information dynamically, allowing them to adapt to changes in the network topology automatically.

Explanation of Each Protocol:

OSPF (Open Shortest Path First):A link-state routing protocol that uses the Dijkstra algorithm to calculate the shortest path to destinations. It is widely used in enterprise networks.

IS-IS (Intermediate System to Intermediate System):Another link-state routing protocol, similar to OSPF, but primarily used in service provider networks.

RIP (Routing Information Protocol):A distance-vector routing protocol that uses hop count as its metric. It is simple but less scalable compared to OSPF and IS-IS.

BGP (Border Gateway Protocol):A path-vector routing protocol used for inter-domain routing (e.g., between autonomous systems). It is the backbone of the Internet.

Conclusion:All four options (OSPF, IS-IS, RIP, and BGP) are dynamic routing protocols.

Overview of Huawei Campus Network Virtualization:

Huawei's campus network virtualization allows a single physical network to support multiple logical networks (VNs), enabling efficient resource utilization and simplified management.

Explanation of Each Capability:

One network carrying multiple services:This is a core feature of virtualization, where a single physical network supports multiple services (e.g., voice, video, data) through logical segmentation.

Automatic service policy delivery:Virtualization enables automated delivery of service policies to ensure consistent configuration across all devices in the network.

Automatic virtual network (VN) deployment:Huawei's solution automates the creation and deployment of virtual networks, reducing manual intervention and speeding up service provisioning.

Automatic physical network deployment:This is incorrect because physical network deployment typically involves manual setup and configuration, which cannot be fully automated.

Conclusion:The correct capabilities are Options A, B, and C.

Comparison of S5735-L and S5731-S Series Switches:

Both series belong to Huawei's campus switch portfolio but target different use cases and have distinct features.

Subcard Expansion Ports:

S5735-L Series:These switches donotsupport subcard expansion ports. They are designed for fixed configurations and are suitable for small to medium-sized networks.

S5731-S Series:These switchesdosupport subcard expansion ports, allowing for greater flexibility in terms of port types and densities. This makes them ideal for larger or more complex networks.

Conclusion:The statement is TRUE because the S5735-L series lacks subcard expansion ports, while the S5731-S series supports them.

The evolution of data centers has progressed through several distinct phases, driven by advancements in technology and changing business requirements. Below is an analysis of each phase:

Centralized : Early data centers were centralized, with all resources (servers, storage, and networking) located in a single physical location. This model was simple but lacked scalability and flexibility.

Multi-site and multi-cloud : Modern data centers often span multiple physical locations and integrate with public, private, and hybrid clouds. This phase emphasizes distributed architectures and cloud-native applications.

Distributed : As workloads grew, data centers evolved into distributed models, where resources are spread across multiple sites to improve redundancy, scalability, and performance.

Virtualization : Virtualization technologies enabled the abstraction of physical resources, allowing multiple virtual machines (VMs) or containers to run on a single physical server. This phase significantly improved resource utilization and flexibility.

All four options represent key phases in the evolution of data centers.

SD-WAN (Software-Defined Wide Area Network)is a transformative technology that enhances traditional WAN architectures. Its key characteristics include:

Automatic and intelligent O&M:Centralized management and real-time visibility simplify operations and improve troubleshooting.

Zero Touch Provisioning (ZTP):Enables rapid deployment of branch offices without manual configuration, reducing time and effort.

Dynamic traffic steering:Adjusts traffic paths based on application priorities, ensuring optimal performance for critical applications.

Value-added services:Integrates WAN optimization, security, and other services to enhance network capabilities and streamline service delivery.

These features make SD-WAN a preferred solution for modern enterprises seeking agility, scalability, and cost efficiency.

The Huawei iMaster NCE (Network Cloud Engine) is a next-generation network management and control platform that integrates SDN, automation, and AI capabilities. Let us evaluate each option:

Application-based intelligent traffic steering, optimizing applications and guaranteeing experience : This is a valid feature of NCE. It uses AI-driven analytics to optimize traffic paths based on application requirements, ensuring optimal performance and user experience.

One set of controller, centrally managing LAN/WAN services : This is also correct. NCE provides unified management for both LAN and WAN services, simplifying operations and reducing complexity.

One hop from the AR1000V to ten clouds, multi-cloud interconnection : This statement is not correct . While NCE supports multi-cloud interconnection, the claim of "one hop from the AR1000V to ten clouds" is an exaggeration and not supported by official documentation. Multi-cloud interconnection involves complex routing and policies, and such a simplified description is misleading.

Border security protection, ensuring egress security for branches : This is a valid feature of NCE. It includes security functions like firewalls and intrusion detection/prevention systems (IDS/IPS) to protect branch egress points.

Thus, the incorrect description is C .

Huawei's iMaster NCE-FabricInsight is an intelligent O&M platform for data center networks that leverages knowledge graph modeling to enhance network management and troubleshooting. Below is an explanation of each option:

"1-3-5" troubleshooting : This refers to a structured approach for fault detection, isolation, and resolution within 1 minute of fault detection, 3 minutes of fault location, and 5 minutes of fault recovery. FabricInsight uses AI-driven analytics to achieve this level of efficiency.

Data plane verification (DPV) : DPV ensures the correctness of the data forwarding path by verifying configurations and detecting anomalies in real time. This helps prevent issues like misconfigurations or routing errors.

Network snapshot comparison : This feature allows administrators to compare network states at different points in time, helping identify changes that may have caused performance degradation or faults.

Network health evaluation : FabricInsight continuously monitors the network and evaluates its health status, providing insights into potential risks and optimization opportunities.

All four options are valid O&M services provided by iMaster NCE-FabricInsight.

Understanding Overlay Topologies in SD-WAN:

In Huawei's SD-WAN solution, overlay networks are created on top of the physical underlay network. These overlays can be customized based on specific services or applications.

Service Independence:

Different service topologies (e.g., voice, video, data) areindependent of each other, allowing granular control over traffic paths, QoS policies, and security settings.

Conclusion:The statement is TRUE because overlay topologies in Huawei's SD-WAN solution are service-specific and operate independently.

Challenges in Campus Networks During the All-Cloud Era:

As enterprises transition to cloud-based architectures, campus networks face several challenges due to increased complexity, scalability demands, and integration with cloud services.

Explanation of Each Challenge:

Difficult network scaling:As businesses grow, scaling traditional campus networks to meet increasing demands becomes challenging without proper automation and flexibility.

Cloud outpacing network:The rapid adoption of cloud services often surpasses the ability of traditional networks to adapt, leading to performance bottlenecks.

Wi-Fi discontinuous networking:Ensuring seamless Wi-Fi coverage and connectivity across large campuses is a significant challenge, especially in environments with high user density.

Slow fault locating:Traditional networks lack advanced tools for real-time monitoring and troubleshooting, resulting in delays in identifying and resolving issues.

Cross-domain fragile infrastructure:Managing multiple domains (e.g., wired, wireless, and cloud) introduces complexity and increases the risk of failures if not properly integrated.

Conclusion:All the listed challenges are valid and commonly faced by enterprises moving toward the all-cloud era.

MPLS (Multiprotocol Label Switching) is a tunneling technology that enables fast, efficient data forwarding based on labels rather than traditional IP routing. It providesconnection-orientedforwarding using label-switched paths (LSPs), ensuring reliableQuality of Service (QoS).

(A) True– MPLS is connection-oriented and enhances QoS by predefining LSPs through traffic engineering.

(B) True– MPLS useslabel switching, eliminating the need for IP lookups at each hop, significantly improving forwarding efficiency.

(C) False– MPLS is not connectionless; rather, it establishes virtual circuits (LSPs) for traffic. It providesend-to-end QoSthrough traffic prioritization.

(D) True– Labels in MPLS can be eithermanually assignedordynamically allocatedusing protocols likeLDP (Label Distribution Protocol)orRSVP-TE.

In Huawei switches, Layer 2 Ethernet interfaces are used to forward data at the data link layer (Layer 2) of the OSI model. These interfaces are essential for VLAN segmentation and communication within a local area network (LAN). The three main types of Layer 2 Ethernet interfaces are:

Hybrid:A hybrid interface can carry traffic from multiple VLANs and is highly flexible. It allows both tagged and untagged traffic, making it suitable for complex network designs.

Trunk:A trunk interface is used to carry traffic from multiple VLANs between switches or other network devices. It typically tags VLAN traffic using IEEE 802.1Q encapsulation.

Access:An access interface is associated with a single VLAN and is used to connect end devices like PCs or IP phones. It carries untagged traffic by default.

The options "Agg" (likely referring to aggregation) and "Core" are not Layer 2 interface types but rather refer to higher-level concepts like link aggregation or core network architecture.

Fault Management in Autonomous Driving Networks:

Huawei's autonomous driving network leverages AI and machine learning to achieve rapid fault detection, analysis, and resolution.

Fault Management Metrics:

Locate faults within 1 minute:AI-driven tools quickly identify the root cause of issues.

Analyze faults within 3 minutes:Advanced analytics provide detailed insights into the nature and impact of faults.

Rectify faults within 5 minutes:Automated remediation workflows resolve issues promptly, minimizing downtime.

Conclusion:The statement is TRUE because Huawei's autonomous driving network meets these fault management metrics.

Huawei'sS6730-H24X6CandS6730-H48X6Cswitches are part of the CloudEngine S series and are designed for high-performance campus networks. These models supportsix fixed 100GE uplink ports,eliminating the need for additional subcards to expand uplink capacity. This design offers several advantages:

Higher reliability:Fixed ports reduce points of failure compared to modular subcards.

Simplified deployment:No need for additional hardware or configuration.

Better performance:Optimized for high-speed connectivity and scalability.

Non-Huawei switches that rely on subcards may face limitations in terms of reliability and flexibility, making Huawei's fixed-port design a competitive advantage.

AWLAN (Wireless Local Area Network)is anetwork that connects wireless devices (Wi-Fi terminals) via access points (APs)using the802.11 protocol.

(A) LAN – False:A LAN is a broader concept that includes both wired and wireless networks.

(B) WAN – False:A WAN connects geographically distant networks, not local wireless devices.

(C) WLAN – True:APs connect to the wired network via Ethernet and provide wireless connectivity to devices.

(D) MAN – False:A MAN (Metropolitan Area Network) spans a city or large area, not limited to wireless connectivity.

The Huawei AC6805 is a high-performance wireless access controller designed for large-scale enterprise networks. It supports up to 120 Gbps of forwarding capacity, enabling it to handle high-density Wi-Fi deployments and demanding applications like video streaming and IoT.

The other options (60 Gbps, 40 Gbps, and 100 Gbps) do not match the specifications of the AC6805. While lower-end models in the AC series may have reduced forwarding rates, the AC6805 is specifically designed to deliver exceptional performance for large-scale networks.

Thus, the correct answer is A .