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| Section | Objectives |
|---|---|
| Broadband Services | - High-speed Internet services - Lightspan service components - Intent mapping to network layers - Voice services - Value-added and triple-play services - Intent-Based Networking (IBN) - IPTV services |
| Introduction to Fixed Networks | - FTTH concepts and solutions - FTTx concepts and solutions - Broadband access services - Fixed Wireless Access (FWA) - Broadband network fundamentals |
| Home Network | - Home network devices - Home network connectivity - Wi-Fi fundamentals - Home network device management |
| Fixed Networks Management | - IPFIX telemetry collection - Corteca home device controller - NETCONF and YANG - Altiplano SDAN Controller - Nokia SDAN solution - NFV and SDN fundamentals |
| Access Network | - Quality of Service (QoS) fundamentals - Access network architecture - Optical Line Terminal (OLT) functionality - Multicast protocols for video distribution |
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質問 # 39
Why does an access automation platform store operational state, logs, and telemetry in a common data lake?
正解：D
解説：
A common data lake provides a centralized location for operational state, telemetry, logs, alarms, and other information collected from access-network devices and applications. Centralized data enables monitoring tools to correlate information across multiple nodes, evaluate network health, identify trends, and support analytics-driven automation. Historical data can also assist with troubleshooting, performance baselining, capacity planning, and detection of abnormal behavior. The data lake does not replace physical access devices; it stores information describing their operation. It is intended to make relevant information available to authorized applications rather than prevent historical access. It also does not automatically transform subscriber unicast traffic into multicast. Forwarding behavior is controlled through service and network configuration, whereas the data lake supports visibility, analysis, and operational decision-making.
質問 # 40
Which characteristic distinguishes G.fast from traditional ADSL technologies?
正解：A
質問 # 41
In a voice service delivered through an ONT, which component commonly provides signaling toward the operator's SIP infrastructure?
正解：B
解説：
A voice-capable ONT commonly contains a SIP agent that handles signaling toward the operator's SIP registrar and proxy infrastructure. An analog telephone can connect to a telephone interface on the ONT, which converts between the analog user interface and the packet-based voice service. Within the access node, voice traffic can be carried through a voice forwarder and an appropriate VPLS toward the aggregation network. A passive optical splitter merely divides optical power and cannot originate or terminate SIP signaling. A Wi-Fi mesh satellite extends wireless coverage, while IGMP snooping manages Layer 2 forwarding for multicast groups. SIP signaling establishes and manages communication sessions, whereas the actual media stream is commonly carried separately using a real-time transport protocol once the call has been established.
質問 # 42
Within the ETSI NFV management and orchestration architecture, which functional block manages virtualized compute, storage, and networking resources?
正解：D
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 # 43
Which transport protocol is commonly used to provide a secure connection for NETCONF sessions?
正解：C
解説：
NETCONF is commonly transported over Secure Shell, which provides encryption, integrity protection, and peer authentication for the management session. After establishing the secure transport connection, the client and server exchange NETCONF capabilities and use RPC messages to retrieve or modify device data. IGMP manages IPv4 multicast group membership and does not provide a secure management transport. ARP resolves IPv4 addresses to Layer 2 hardware addresses within a local network. SIP establishes and manages communication sessions such as voice calls. Although NETCONF can conceptually operate over supported secure transports, NETCONF over SSH is the widely recognized deployment model. Secure transport is particularly important because NETCONF can expose operational information and perform configuration changes that materially affect access-network devices and subscriber services.
質問 # 44
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