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| Section | Objectives |
|---|---|
| Home Network | - Wi-Fi fundamentals - Home network device management - Home network devices - Home network connectivity |
| Access Network | - Optical Line Terminal (OLT) functionality - Quality of Service (QoS) fundamentals - Multicast protocols for video distribution - Access network architecture |
| Fixed Networks Management | - Corteca home device controller - Nokia SDAN solution - NFV and SDN fundamentals - IPFIX telemetry collection - Altiplano SDAN Controller - NETCONF and YANG |
| Introduction to Fixed Networks | - Broadband network fundamentals - Fixed Wireless Access (FWA) - Broadband access services - FTTx concepts and solutions - FTTH concepts and solutions |
| Broadband Services | - Intent mapping to network layers - IPTV services - Lightspan service components - Value-added and triple-play services - High-speed Internet services - Intent-Based Networking (IBN) - Voice services |
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質問 # 28
Which of the following statements correctly describes downstream and upstream transmission in a GPON network?
正解：C
解説：
GPON uses different transmission methods in the downstream and upstream directions. In the downstream direction, the OLT sends a continuous stream through the passive optical splitter. This stream reaches every connected ONT, but each ONT processes only the frames intended for it. Encryption can protect subscriber traffic from other ONTs on the same PON. In the upstream direction, several ONTs share the same optical fiber and cannot transmit simultaneously without coordination. The OLT therefore assigns transmission opportunities using Time Division Multiple Access. Dynamic Bandwidth Allocation can adjust these upstream grants according to traffic demand and service requirements. Separate fibers are not required for each subscriber because GPON commonly uses wavelength separation to carry downstream and upstream traffic over the same fiber infrastructure.
質問 # 29
Within the ETSI NFV management and orchestration architecture, which functional block manages virtualized compute, storage, and networking resources?
正解：C
解説：
The Virtualized Infrastructure Manager manages the compute, storage, and networking resources that form the NFV Infrastructure. Its responsibilities can include allocating resources to virtual workloads, tracking available capacity, and controlling the virtualized environment. The Virtual Network Functions Manager has a different role: it manages the lifecycle of VNF instances, including operations such as instantiation, scaling, updating, and termination. Higher-level NFV orchestration coordinates network services and resources across the NFV environment. A traditional Network Management System can perform fault, configuration, accounting, performance, and security management, but it is not the NFV functional block specifically defined to control virtual infrastructure resources. An ONT is subscriber-premises access equipment and is unrelated to NFV infrastructure resource management.
Batch 2: Questions 11-20
質問 # 30
Which connection is normally used by a Fixed Wireless Access indoor gateway to reach the service provider's access network?
正解：B
解説：
A Fixed Wireless Access indoor gateway normally uses a 4G or 5G radio connection to reach the service provider's mobile or fixed-wireless access network. Inside the home, the gateway can provide Ethernet and Wi-Fi connectivity to subscriber devices. This separates the wide-area access technology from the in-home distribution technology: cellular radio connects the premises to the operator, while Wi-Fi connects local user devices. A DSLAM is associated with copper-based DSL access, and a passive optical splitter belongs to a PON deployment. A subtending interface connects access nodes rather than a subscriber gateway to a radio network. Depending on the deployment, the FWA gateway may also be remotely provisioned and monitored using an external management platform and standardized CPE-management mechanisms.
質問 # 31
Which Wi-Fi 7 capability allows a compatible device to use more than one frequency-band link as part of the same connection?
正解：C
質問 # 32
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
正解：B
質問 # 33
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