H19-315 Huawei Certified Pre - sales Associate–Transmission&Access(HCPA-ATR) Free Practice Exam Questions (2025 Updated)

The correct answer is1. TheOptiXtrans DC908is designed to support high-density configurations, allowing an8x200G (2x100GE)WDM system to be deployed using justone chassis.

Here’s a breakdown of how this is achieved:

High Integration:The DC908 integrates multiple components, such as optical modules, amplifiers, and control units, into a single compact2U chassis. This eliminates the need for additional hardware or external devices.

Scalability:The DC908 supports up to8 wavelengths per fiber pair, each operating at200G. This means that all 8x200G channels can be accommodated within a single device.

Service Aggregation:Each 200G wavelength can carry multiple 100GE services, enablingefficient aggregation of traffic. For example, two 100GE services can be mapped onto a single 200G wavelength.

Space Efficiency:By consolidating everything into one chassis, the DC908 minimizes rack space requirements, making it ideal for data centers and edge locations where space is limited.

Other options:

2, 3, or 4 chassis:These would only be necessary for extremely large-scale deployments or if additional redundancy were required. However, for an 8x200G system, a single chassis is sufficient.

This compact design highlights the DC908’s efficiency and cost-effectiveness for modern optical networks.

TheOptiXtrans DC908is a cutting-edge data center interconnect (DCI) solution with several key highlights:

High Security:Provides end-to-end encryption and physical isolation to protect sensitive data.

Intelligent O&M:Leverages AI-driven analytics and automation for efficient network management.

Simplified Provisioning:Enables plug-and-play deployment and automated service provisioning, reducing operational complexity.

Ultra Broadband & High Integration:Supports up to 800G per wavelength and integrates multiple functions into a compact 2U form factor, maximizing capacity and efficiency.

These features make the DC908 ideal for modern data center interconnect scenarios.

References:

Huawei OptiXtrans DC908 Product Documentation

Huawei DCI Solution Guide

TheOptiXtrans DC908supports multiple management systems to ensure efficient operation and monitoring. Here’s an analysis of each option:

NCE-T Lite:The DC908 does not supportNCE-T Lite, as this is a simplified version of the Network Cloud Engine (NCE) designed for smaller-scale deployments.

CLI (Command-Line Interface):The DC908 supports CLI for advanced configuration and troubleshooting tasks.

eSight:While eSight is a powerful network management system, it is not typically used for managing the DC908. Instead, the DC908 relies on NCE or WebGUI.

WebGUI:The DC908 provides aWeb-based Graphical User Interface (WebGUI)for intuitive and user-friendly management.

NCE (Network Cloud Engine):The DC908 integrates withNCEfor centralized control, automation, and intelligent O&M capabilities.

Thus, the correct answers areB (CLI), D (WebGUI), and E (NCE).

References:

Huawei OptiXtrans DC908 Product Documentation

Huawei NCE and WebGUI Management Guide

POL (Passive Optical LAN) is a solution designed for enterprise campus environments, leveraging PON technology to provide converged voice, data, and video services. While POL is highly versatile and can be deployed in various scenarios such as education, healthcare, hospitality, and office environments, itcannot always be sold independentlyin all office scenarios.

The deployment of POL depends on factors such as the existing infrastructure, customer requirements, and the scale of the network. In some cases, additional components like Wi-Fi access points, routers, or switches may be required to complement the POL solution. Therefore, POL is typically sold as part of an integrated solution tailored to the customer's specific needs.

References:

Huawei Campus OptiX Solution Guide

POL Deployment Best Practices

The correct answer is48T. TheHuawei OSN 9800series supports a maximum single-fiber capacity of48 Tbps, making it one of the most advanced optical transport platforms available.

Key factors contributing to this high capacity include:

WDM (Wavelength Division Multiplexing):Combines multiple wavelengths on a single fiber, each carrying data at speeds up to 400G or higher.

OTN (Optical Transport Network):Provides efficient framing and multiplexing, enabling high-density traffic aggregation.

Advanced Modulation Techniques:Uses techniques like QPSK (Quadrature Phase Shift Keying) and QAM (Quadrature Amplitude Modulation) to maximize spectral efficiency.

This level of capacity is critical for backbone and core networks, where large volumes of data need to be transmitted over long distances without bottlenecks.

The correct answers arePower BoardandMain Control Board. Hardware redundancy is a critical feature of Optical Line Terminal (OLT) products to ensure high availability and fault tolerance in carrier-grade networks.

Power Board Redundancy:OLTs like the Huawei EA5800 support dual power supplies to prevent downtime in case of a power supply failure. This redundancy is essential for maintaining continuous service delivery.

Main Control Board Redundancy:The main control board manages system operations and traffic forwarding. Dual control boards ensure that if one fails, the backup takes over seamlessly, minimizing service disruption.

Other options:

Uplink Port:While uplink ports are critical for connecting the OLT to the core network, they are not typically redundant at the hardware level. Instead, redundancy is achieved through network design (e.g., multiple uplinks).

Service Port:Service ports connect to ONUs and are not individually redundant. However, the OLT’s distributed architecture ensures that a failure in one port does not affect the entire system.

Optical modules are categorized based on their transmission distance and power budget. The most commonly used classes in commercial deployments are:

Class B+:Supports distances up to 20 km and is widely used in urban and suburban areas.

Class C+:Supports distances up to 40 km and is suitable for medium-range deployments.

Class D:Supports distances up to 60 km and is ideal for long-haul connections in remote areas.

ClassesEandFare either outdated or not commercially viable due to their limited use cases.

References:

ITU-T G.984 Standard - Optical Module Specifications

Huawei Optical Module Product Guide

All the options are correct. TheNCE-T (Network Cloud Engine for Transport)offers a comprehensive suite of features to enhance optical transport network management and service delivery. Here’s a breakdown of each highlight:

Visualized Bandwidth Resources:

Provides a graphical representation of bandwidth utilization across the network.

Enables operators to identify bottlenecks, optimize resource allocation, and plan capacity upgrades.

Optical VPN (OVPN):

Creates dedicated virtual paths (hard pipes) for specific services or customers, ensuring isolation and security.

Ideal for applications like financial trading, government communications, and enterprise connectivity.

Optical Service Provisioning:

Automates the provisioning of optical services, reducing manual intervention and speeding up service delivery.

Supports diverse services like OTN, Ethernet, and SDH.

CPE Plug and Play:

Simplifies the deployment of customer premises equipment (CPE) by automating configuration and activation.

Reduces installation time and operational costs, especially for large-scale rollouts.

Optical Latency Map:

Provides real-time visualization of latency across the network.

Helps operators optimize routing for low-latency applications like cloud computing, AI, and 5G backhaul.

These features collectively enhance the efficiency, reliability, and profitability of optical transport networks.

Campus OptiX (POL) delivers significant value to customers through the following key benefits:

Simple Architecture:POL simplifies network design by using a single fiber infrastructure to deliver multiple services (voice, data, video), reducing complexity and cost.

Smart O&M:With centralized management tools like eSight, POL enables efficient monitoring, troubleshooting, and automation of network operations.

Easy to Evolve:POL supports future-proof technologies like XG-PON and NG-PON2, allowing seamless upgrades to higher bandwidths.

High Reliability:The passive nature of POL (no active components in the ODN) ensures high reliability and low maintenance requirements.

These advantages make POL an attractive solution for enterprise campuses and other large-scale deployments.

References:

Huawei Campus OptiX Solution Guide

POL Deployment Best Practices

TheNCE-FAN Home Networksolution is designed to enhance the management and performance of home networks in Fiber-to-the-Home (FTTH) deployments. Its key highlights include:

Intelligent O&M for Home Networks:Uses AI-driven analytics to monitor and troubleshoot issues remotely, reducing the need for field visits.

High-Quality Home Network Deployment:Ensures optimal placement of Wi-Fi access points and ONTs for seamless coverage and fast service activation.

Accurate Insight:Provides detailed visibility into network performance and user behavior, helping service providers identify upsell opportunities.

Automatic Service Deployment:Automates the provisioning and configuration of services, accelerating time-to-market for new offerings.

These features improve customer satisfaction while reducing operational costs for service providers.

References:

Huawei NCE-FAN Product Documentation

Huawei Home Network Solution Guide

The correct definition ofPOL (Passive Optical LAN)is that it is the application of PON (Passive Optical Network) technology in the enterprise campus environment. POL leverages the advantages of fiber optics, such as high bandwidth, long transmission distances, and low maintenance costs, to provide a converged network solution for enterprises. It replaces traditional copper-based LANinfrastructure with an all-optical network, supporting services like data, voice, and video over a single fiber.

Procurement on Line, Purchasing Online System:This is unrelated to POL and refers to online procurement systems.

Point of Load:Refers to power electronics and is unrelated to optical networks.

Port of Loading:A logistics term referring to the location where goods are loaded onto a carrier, unrelated to POL.

The statement isTrue. TheOptiXtrans E9605is a compact and modular optical transmission device, often deployed inOLA (Optical Line Amplifier)stations.

Key characteristics of the OptiXtrans E9605 include:

Small Form Factor:Its compact design makes it ideal for space-constrained environments, such as OLA stations where only amplification is required.

Amplification Capability:Equipped with optical amplifiers (e.g., EDFA), it boosts optical signals to compensate for attenuation over long distances.

Simplified Deployment:The device is easy to install and maintain, reducing operational complexity in OLA applications.

OLA stations are intermediate points in optical networks where signals are amplified without being regenerated or processed electrically. The OptiXtrans E9605 is specifically optimized for such scenarios.

Huawei is a global leader in telecommunications and networking technologies, and it has consistently rankedNo. 1 in ITU patent contributions. The International Telecommunication Union (ITU) is a specialized agency of the United Nations responsible for standardizing global telecommunications technologies. Huawei's significant contributions to ITU standards, particularly in areas like 5G, optical transport, and PON technologies, reflect its commitment to innovation and leadership in the industry.

These contributions not only demonstrate Huawei's technical expertise but also ensure that its products are aligned with the latest global standards, providing customers with cutting-edge solutions.

References:

ITU Patent Contribution Reports

Huawei Annual Innovation Report

GPON (Gigabit Passive Optical Network) does not use AES-128 encryption for downstream traffic. Instead, GPON uses AES-128 encryptiononly for upstream trafficto ensure data security between the Optical Network Unit (ONU) and the Optical Line Terminal (OLT). Downstream traffic in GPON is broadcasted to all ONUs, and encryption is not applied because the data is intended for multiple users. The encryption key is dynamically managed by the OLT and distributed securely to the ONUs.

This behavior is defined in theITU-T G.984 standard, which specifies the GPON architecture and security mechanisms. For downstream traffic, the security relies on higher-layer protocols (e.g., IPsec or application-level encryption).

References:

ITU-T G.984 Standard - GPON Architecture and Security

Huawei GPON Technical Documentation

TheeSightoffering includes both the software and hardware components required for network management. Specifically, when quoting eSight, the package typically includes:

TheeSight software, which provides comprehensive network management capabilities.

Thehardware server(e.g., Huawei FusionServer or TaiShan Server) on which the software is deployed.

Options like "Network Cloud Engine-FAN" and "NCE_FusionCompute" are unrelated to eSight, while "eSight Outsourcing" refers to managed services rather than a hardware-inclusive package.

References:

Huawei eSight Product Documentation

Huawei Network Management Solution Guide

The correct answer isFiber Doctor. TheFiber Doctorfeature is specifically designed to monitor the status of optical fibers and quickly identify fault points in the network.

Here’s how Fiber Doctor works and why it’s essential:

Real-Time Monitoring:Continuously monitors fiber health, detecting issues like attenuation, breaks, or degradation.

Fault Localization:Uses advanced algorithms to pinpoint the exact location of faults, reducing the time and effort required for troubleshooting.

Proactive Maintenance:Identifies potential issues before they impact service, enabling preventive maintenance and minimizing downtime.

Visualization:Provides a graphical representation of the fiber network, making it easier for operators to understand and address problems.

Other options:

Optical Doctor:Focuses on optimizing optical signal quality but does not specialize in faultlocalization.

Service Doctor:Monitors service performance (e.g., latency, packet loss) rather than physical fiber status.

Wavelength Doctor:Ensures proper wavelength allocation in WDM systems but does not monitor fiber health.

TheNCE-FAN (Network Cloud Engine - Fiber Access Network)is a comprehensive platform for managing fiber access networks. It consists of three core modules:

Management Module:Handles device configuration, fault monitoring, and performance management.

Control Module:Provides centralized control over network resources, enabling features like automatic service provisioning and policy enforcement.

Analysis Module:Uses AI and big data analytics to provide insights into network performance, user behavior, and potential issues.

These modules work together to deliver intelligent, efficient, and scalable management of fiber access networks.

References:

Huawei NCE-FAN Product Documentation

Huawei Fiber Access Network Solution Guide

The statement isTrue. TheOptiXtrans E9600 seriesincludes multiple models, such as theE9624,E9612, andE9605, each designed for specific use cases in optical transmission networks.

Here’s an overview of the models:

OptiXtrans E9624:A high-capacity device used in backbone and core networks, supporting large-scale traffic aggregation and long-distance transmission.

OptiXtrans E9612:A mid-range device suitable for metro and regional networks, balancing capacity and cost-effectiveness.

OptiXtrans E9605:A compact device primarily used in OLA stations for optical signal amplification.

The modular design of the E9600 series allows operators to select the appropriate model based on their network requirements, ensuring optimal performance and scalability.

TheFTTx (Fiber-to-the-x)solution is a versatile technology that enables the delivery of multiple services over a single fiber-optic infrastructure. The key services provided by FTTx include:

High-Speed Internet:Delivers broadband connectivity to homes, businesses, and institutions.

Home-WiFi:Supports wireless networking within premises using Wi-Fi-enabled ONTs or routers.

Telephone:Provides Voice over IP (VoIP) services for telephony applications.

IPTV:Enables high-quality video streaming for entertainment and educational purposes.

FTTx solutions are widely used in Fiber-to-the-Home (FTTH), Fiber-to-the-Building (FTTB), and Fiber-to-the-Curb (FTTC) deployments, offering converged services to meet diverse customer needs.

References:

Huawei FTTx Solution Guide

ITU-T G.984 Standard - FTTx Applications