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| Section | Objectives |
|---|---|
| Topic 1: Broadband Services | - IPTV services - Lightspan service components - Intent mapping to network layers - Value-added and triple-play services - Intent-Based Networking (IBN) - Voice services - High-speed Internet services |
| Topic 2: Access Network | - Optical Line Terminal (OLT) functionality - Access network architecture - Quality of Service (QoS) fundamentals - Multicast protocols for video distribution |
| Topic 3: Fixed Networks Management | - NETCONF and YANG - Altiplano SDAN Controller - NFV and SDN fundamentals - IPFIX telemetry collection - Corteca home device controller - Nokia SDAN solution |
| Topic 4: Introduction to Fixed Networks | - Broadband network fundamentals - Fixed Wireless Access (FWA) - FTTx concepts and solutions - Broadband access services - FTTH concepts and solutions |
| Topic 5: Home Network | - Home network devices - Home network device management - Home network connectivity - Wi-Fi fundamentals |
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質問 # 26
A provider wants to separate every subscriber's traffic throughout the access network, even when subscribers use the same service. Which VLAN model best meets this requirement?
正解：D
解説：
A VLAN-per-subscriber model assigns a distinct VLAN context to each subscriber, providing clear Layer 2 separation between subscribers even when they consume the same service. This can simplify subscriber identification and support individual policy or forwarding treatment, but it requires the network to accommodate a larger number of VLANs. In a VLAN-per-service model, multiple subscribers using the same service can share a service VLAN toward the aggregation network. The access node must then preserve subscriber isolation through other forwarding controls and map traffic correctly between subscriber-facing and network-facing interfaces. Using one untagged VLAN for the entire access network provides insufficient segmentation. Assigning a VLAN to each multicast channel categorizes content rather than uniquely separating individual subscribers and therefore does not meet the stated requirement.
質問 # 27
In intent-based networking, what does an operator primarily specify through an intent?
正解：C
解説：
An intent describes the desired network outcome or target state rather than requiring the operator to manually enter every device-level command. The intent system maps the requested outcome to the configurations and resources needed on the relevant network elements. It can then compare the intended state with the observed operational state and take corrective action when supported. Intent types, profiles, and associated models provide the logic and parameters required for this translation. An intent does not normally specify the electrical construction of hardware or list every packet to be forwarded. Optical measurements may be used as operational inputs, but they are not the general definition of an intent. This abstraction improves consistency, supports automation, and reduces repetitive device-by-device configuration work.
質問 # 28
A subscriber installs several coordinated Wi-Fi access points to provide consistent coverage throughout a large home. What type of solution is this?
正解：D
解説：
A Wi-Fi mesh system uses multiple coordinated Wi-Fi nodes or access points to extend wireless coverage across a home or other large area. The nodes operate as part of one managed system and can steer clients or select paths to improve coverage and user experience. This differs from a single Wi-Fi router, which combines routing, switching, and wireless access functions in one device but may not adequately cover a large property. A passive optical network delivers fiber access and does not describe the in-home wireless topology. DSL bonding combines copper pairs, while a virtual network function is a software implementation of a network function running on virtualized infrastructure. Placement, backhaul quality, interference, and radio-resource management all affect mesh performance.
質問 # 29
Which component of a typical Optical Distribution Network requires no electrical power to perform its primary function?
正解：C
解説：
A passive optical splitter divides an incoming optical signal into multiple output paths without requiring electrical power. It is a fundamental component of the Optical Distribution Network connecting an OLT to multiple ONTs or ONUs. The splitter does not regenerate, amplify, or actively switch the optical signal. Consequently, splitting introduces optical loss that must be considered when calculating the PON power budget. The OLT and ONT are active devices because they require power to transmit, receive, process, and convert signals. A residential gateway also requires power to provide functions such as routing, firewall enforcement, DHCP, Ethernet switching, and Wi-Fi connectivity. The use of passive splitters reduces the need for powered equipment in the outside plant, which can simplify field maintenance and lower operational costs.
質問 # 30
What is the primary function of the cladding in an optical fiber?
正解：D
質問 # 31
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