Free Practice Questions for Huawei H19-315 Exam

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.

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.

The statement isTrue. TheOptiXtrans DC908can be managed using aWebGUI (Web Graphical User Interface), providing a user-friendly way to configure, monitor, and troubleshoot the device.

Key features of the WebGUI include:

Ease of Use:The WebGUI offers an intuitive interface for operators, reducing the learning curve compared to command-line tools.

Centralized Management:Provides access to key functions like performance monitoring, fault detection, and service provisioning.

Remote Access:Enables administrators to manage the DC908 from any location with internet connectivity, improving operational efficiency.

Integration with NCE:While the WebGUI is available for standalone management, the DC908 also integrates seamlessly with Huawei’sNCE (Network Cloud Engine)for advanced automation and orchestration.

This flexibility in management options makes the DC908 suitable for both small-scale deployments and large-scale carrier networks.

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

TheNCE-T (Network Cloud Engine - Transport)follows a licensing model that includes both apermanent licenseand anSNS (Software Support and Services)annual fee. Here’s how it works:

Permanent License:Grants access to the core features and functionalities of NCE-T indefinitely. This ensures long-term usability without recurring costs for the base software.

SNS Annual Fee:Covers ongoing support, software updates, bug fixes, and technical assistance. Customers must renew this annually to stay current with the latest enhancements and receive priority support.

This hybrid model is common in enterprise-grade software solutions, balancing upfront investment with ongoing operational costs.

References:

Huawei NCE-T Licensing Guide

Huawei Software Support and Services (SNS) Documentation

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

Huawei has consistently maintained theNo. 1 global market sharein the field ofoptical transmission and access networksfor over a decade. This leadership position is attributed to several factors:

Innovation Leadership:Huawei invests heavily in R&D, driving advancements in technologies like OTN, WDM, PON, and MS-OTN.

Comprehensive Portfolio:Its product portfolio spans from core backbone networks to metro, access, and data center interconnect solutions.

Global Presence:Huawei serves customers across industries and regions, including telecom operators, enterprises, and governments.

Industry Recognition:Reports from firms like Dell’Oro Group and Omdia consistently rank Huawei as the top vendor in optical networking.

This sustained dominance underscores Huawei’s ability to deliver cutting-edge solutions that meet evolving customer needs.

References:

Dell’Oro Group Optical Transport Market Report

Huawei Annual Innovation Report

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.

TheOptiXtrans DC908is specifically designed fordata center interconnect (DCI)applications, not backbone long-distance networks. Its primary use cases include:

Connecting geographically distributed data centers for cloud services, disaster recovery, and load balancing.

Supporting short-reach, high-capacity links (e.g., metropolitan areas) rather than ultra-long-haul backbone networks.

For long-distance backbone networks, Huawei offers other products like theOptiXtrans E9600 seriesorOSN 9800 series, which are optimized for higher capacities and longer distances.

References:

Huawei OptiXtrans DC908 Product Datasheet

Huawei DCI vs. Backbone Network Deployment Guide