H19-315 Practice Questions

The correct answer isN402. TheN402 boardis specifically designed to support400G per

wavelengthtransmission, making it ideal for high-capacity optical networks.

Key features of the N402 board include:

High-Speed Transmission:Supports data rates up to 400G per wavelength, enabling efficient traffic

aggregation in backbone and core networks.

Advanced Modulation:Uses modulation schemes like DP-16QAM (Dual Polarization 16 Quadrature

Amplitude Modulation) to achieve high spectral efficiency.

Flexibility:Compatible with various network architectures, including OTN, WDM, and SDH.

Scalability:Can be integrated into existing networks to boost capacity without requiring a complete

overhaul.

Other options:

N220:Typically supports lower data rates (e.g., 100G).

N502:Designed for mid-range applications, not 400G.

N602:Focuses on access networks rather than high-speed backbone transmission.

Reference:

Huawei N402 Board Specifications

ITU-T G.709 Standards for OTN

The correct answer isEG8080P. Afaceplate ONUis a compact Optical Network Unit designed to be

mounted on a wall or faceplate, typically used in Fiber-to-the-Room (FTTR) or Fiber-to-the-Desk

(FTTD) scenarios. TheEG8080Pis specifically designed for such applications, providing high-speed

internet, voice, and video services in a small form factor.

Other options:

EG8240P:A standard home gateway ONU, not a faceplate model.

EG8145V5:A residential gateway ONU, not suitable for faceplate mounting.

EG8020P:A business-class ONU, but not a faceplate model.

Reference:

Huawei ONT/ONU Product Portfolio

Huawei FTTR Solution Documentation

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.

Reference:

Huawei OptiXtrans DC908 Product Documentation

ITU-T G.698 Standards for WDM

The correct answer is38.4T. TheOptiXtrans DC908supports a maximum single-fiber capacity of38.4

Tbps, making it one of the most advanced solutions for high-capacity optical transport.

Here’s how the DC908 achieves this capacity:

WDM Technology:Combines multiple wavelengths on a single fiber, each carrying data at speeds up

to400G.

Advanced Modulation:Uses modulation schemes like DP-16QAM to maximize spectral efficiency,

enabling higher data rates within the same fiber spectrum.

High Density:Supports up to96 wavelengths per fiber, resulting in a total capacity of38.4 Tbps(96 x

400G).

Future-Proofing:Designed to accommodate emerging technologies like 800G wavelengths, ensuring

scalability for future demands.

This level of capacity is critical for applications like data center interconnects, where large volumes of

data need to be transmitted over long distances without bottlenecks.

Reference:

Huawei OptiXtrans DC908 Product Documentation

ITU-T G.698 Standards for WDM

The correct answers areA, B, and C. Here’s a detailed explanation of each statement:

A . MS-OTN is short for Multi-Service Optical Transport Network:This is correct.MS-OTNintegrates

multiple technologies (e.g., OTN, SDH, Ethernet) into a single platform, enabling converged transport

for diverse services.

B . MS-OTN supports SDH, PKT, and OTN services:This is correct. MS-OTN supportsSDH (Synchronous

Digital Hierarchy)for legacy services,PKT (Packet)for Ethernet-based traffic, andOTN (Optical

Transport Network)for high-capacity transport.

C . MS-OTN supports ODUk cross-connections:This is correct. MS-OTN leveragesODUk (Optical

Channel Data Unit-k)cross-connections to efficiently switch and route traffic at the optical layer,

ensuring high performance and scalability.

D . OSN 1800V, 1800II E, and 1800I E all can support MS-OTN:This is incorrect. While theOSN

1800Vand1800II Esupport MS-OTN, the1800I Eis a simpler device designed for access networks and

does not fully support MS-OTN capabilities.

Reference:

Huawei MS-OTN Solution White Paper

ITU-T G.709 Standards for OTN

The statement isTrue. TheOptiXtrans DC908is primarily designed forbackbone long-distance

networks, where high capacity, low latency, and reliability are critical.

Here’s why the DC908 is well-suited for backbone networks:

High Capacity:The DC908 supports up to38.4 Tbps per fiber pair, making it ideal for transporting

massive volumes of data over long distances.

Long-Distance Transmission:Leveraging advanced technologies likeEDFA (Erbium-Doped Fiber

Amplifier)andRaman amplification, the DC908 can transmit data over distances exceeding1,000

kmwithout regeneration.

Low Latency:Designed for ultra-low latency, the DC908 ensures minimal delay for mission-critical

applications like cloud computing, AI, and big data analytics.

Reliability:Features likeoptical protection switchingandhard pipe isolationensure uninterrupted

service even in the event of failures.

While the DC908 can also be used for shorter distances (e.g., metro or regional networks), its

primary application is inlong-haul backbone networksthat connect major cities, data centers, and

international gateways.

Reference:

Huawei OptiXtrans DC908 Product Documentation

ITU-T G.698 Standards for WDM

The correct answer isRoom-like scenarios, including education, hotel, medical, apartment. Campus

OptiX (POL) is primarily designed for enterprise campus environments where high bandwidth, low

latency, and simplified network architecture are required. Common scenarios include:

Education:Connecting classrooms, dormitories, and administrative offices.

Hotels:Providing high-speed internet and IPTV services to guests.

Medical:Supporting hospital networks for patient care, imaging, and telemedicine.

Apartments:Delivering triple-play services (data, voice, video) to residents.

While options like video backhaul and Wi-Fi backhaul are valid use cases for optical networks, they

are typically associated with carrier-grade solutions rather than enterprise-focused Campus OptiX

deployments.

Reference:

Huawei Campus OptiX (POL) Solution White Paper

IEEE 802.3ah Standards for PON

TheFlex-PON boardsupports multiple PON technologies, including:

GPON:Gigabit Passive Optical Network, widely used for residential and small business applications.

XG-PON:10G Asymmetric Passive Optical Network, offering higher upstream and downstream

bandwidths.

XGS-PON:10G Symmetric Passive Optical Network, providing equal upstream and downstream

speeds.

Combo PON:Combines GPON and XG(S)-PON on the same port, enabling seamless upgrades from

GPON to XG(S)-PON without replacing hardware.

The only option not supported by Flex-PON isXG-PON Combo, as "Combo" typically refers to the

integration of GPON and XG(S)-PON, not just XG-PON alone.

Reference:

Huawei Flex-PON Technology White Paper

ITU-T G.984.x and G.988 Standards for PON

The correct answer isNetwork Doctor. TheNetwork Doctorfeature provides real-time monitoring,

early warnings, and optimization capabilities to ensure high-quality network performance.

Here’s how Network Doctor works:

Real-Time Monitoring:Tracks key performance indicators (KPIs) such as latency, jitter, packet loss, and

bandwidth utilization.

Pre-Warning System:Detects anomalies and predicts potential issues before they impact services,

enabling proactive intervention.

Link Optimization:Automatically adjusts network parameters to optimize link performance and

prevent deterioration.

AI and Analytics:Leverages artificial intelligence and big data analytics to provideactionable insights

and recommendations.

Other options:

Fiber Doctor:Focuses on physical fiber health rather than overall network quality.

Optical Doctor:Optimizes optical signal quality but does not monitor end-to-end network

performance.

Service Doctor:Monitors specific services (e.g., IPTV, VoIP) but does not provide comprehensive

network-wide insights.

Reference:

Huawei Network Doctor Technology White Paper

ITU-T G.872 Standards for Optical Network Architecture

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.

Reference:

Huawei OptiXtrans E9600 Series Product Documentation

ITU-T G.694 Standards for Optical Amplifiers