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| Section | Objectives |
|---|---|
| Broadband Services | - Voice services - Value-added and triple-play services - High-speed Internet services - IPTV services - Intent mapping to network layers - Intent-Based Networking (IBN) - Lightspan service components |
| Access Network | - Optical Line Terminal (OLT) functionality - Access network architecture - Quality of Service (QoS) fundamentals - Multicast protocols for video distribution |
| Introduction to Fixed Networks | - FTTH concepts and solutions - FTTx concepts and solutions - Broadband network fundamentals - Broadband access services - Fixed Wireless Access (FWA) |
| Fixed Networks Management | - NETCONF and YANG - NFV and SDN fundamentals - Corteca home device controller - Nokia SDAN solution - Altiplano SDAN Controller - IPFIX telemetry collection |
| Home Network | - Home network connectivity - Home network devices - Wi-Fi fundamentals - Home network device management |
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질문 # 28
What is the primary function of the cladding in an optical fiber?
정답：A
질문 # 29
What is a principal responsibility of the NFV Orchestrator in an NFV environment?
정답：C
설명：
The NFV Orchestrator coordinates the lifecycle of network services composed of one or more virtualized network functions and helps coordinate the infrastructure resources required by those services. It can work with Virtual Network Functions Managers and Virtualized Infrastructure Managers during service instantiation, scaling, modification, and termination. The VNFM focuses on the lifecycle of VNF instances, while the VIM manages virtualized compute, storage, and networking resources. The NFV Orchestrator does not terminate GPON optical signals, manage individual home Wi-Fi radio channels as its primary function, or perform physical fiber installation. Its higher-level coordination role helps translate a network-service definition into the deployment and resource actions necessary to create and maintain that service within the virtualized environment.
질문 # 30
What is the primary purpose of Zero-Touch Provisioning for a newly installed residential Wi-Fi gateway?
정답：D
설명：
Zero-Touch Provisioning allows a newly connected gateway or Wi-Fi device to discover the appropriate management environment and obtain its required configuration with minimal manual intervention. This reduces installation time, lowers the chance of configuration errors, and makes subscriber self-installation more practical. In a managed home-network solution, the device can be associated with the subscriber, receive service parameters, and become visible to the provider's management platform. Zero-Touch Provisioning does not mean that no configuration exists; it means the configuration is delivered automatically instead of being entered locally by a technician. It also does not prevent management communication or turn an active gateway into a passive device. Successful provisioning still depends on network connectivity, device identity, authorization, and compatible management procedures.
질문 # 31
A residential gateway ONT provides routed Internet access to devices in a subscriber's home. Which DHCP role does it normally perform on the home LAN?
정답：A
설명：
A Layer 3 residential gateway normally operates as a DHCP server on the subscriber's home LAN. It assigns private IP addresses and other configuration information, such as the default gateway and DNS server addresses, to connected devices. On its network-facing WAN interface, the gateway may operate as a DHCP client to obtain service parameters from the operator's network. These two DHCP roles must not be confused. The gateway also commonly performs routing, Network Address Translation, firewall enforcement, and local Ethernet or Wi-Fi connectivity. The OLT transports and controls subscriber access traffic but does not normally allocate private LAN addresses directly to individual home devices. This architecture separates the operator-facing connection from the subscriber's private local network and allows multiple home devices to share the broadband service.
질문 # 32
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?
정답：B
설명：
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.
질문 # 33
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