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Nokia 4A0-F10 Exam Syllabus Topics:

Section	Objectives
Home Network	- Home devices and connectivity - Wi-Fi fundamentals
Access Network	- Access network architecture - Multicast and QoS principles - OLT functions
Introduction to Fixed Networks	- FTTH, FTTx and FWA solutions - Broadband access fundamentals
Broadband Services	- Lightspan service components - Internet, IPTV and voice services
Fixed Networks Management	- Netconf/YANG and telemetry - NFV and SDN concepts - Altiplano Software-Defined Access Network (SDAN)

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Nokia Fixed Networks Fundamentals Sample Questions (Q22-Q27):

NEW QUESTION # 22
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?

A. Subscriber-authentication intent
B. Uplink-connection intent
C. Wi-Fi-radio intent
D. Multicast-report intent

Answer: B

Explanation:
The uplink-connection intent defines how an OLT connects toward the aggregation or transport network. It is used to configure relevant uplink resources, which can include network-facing interfaces and associated parameters supported by the device and intent model. This intent is distinct from the broader device intent and device-configuration information used to identify and configure the particular access node and its assigned profiles. Subscriber authentication, Wi-Fi radio operation, and multicast membership reporting are separate functional areas and are not substitutes for the OLT uplink-connection intent. By representing uplink connectivity as an intent, Altiplano can translate the desired connection into lower-level device configuration and apply it consistently through model-driven management. The resulting configuration must still match the capabilities and physical resources available on the selected OLT.

NEW QUESTION # 23
Which characteristic distinguishes G.fast from traditional ADSL technologies?

A. G.fast commonly uses high frequencies and time-division duplexing over short copper loops.
B. fast is designed to deliver high broadband rates over relatively short copper loops, frequently using existing building or drop wiring. It uses a much wider and higher-frequency spectrum than traditional ADSL and commonly employs Time Division Duplexing. With TDD, upstream and downstream transmission use the same frequency spectrum during different time intervals. The upstream-to-downstream capacity ratio can therefore be adjusted through the TDD configuration. Higher frequencies can support greater capacity but experience substantial attenuation over distance, which is why G.fast is best suited to short loops. It does not operate through passive optical splitters, although fiber may be deployed close to the subscriber before the final copper segment. G.fast also supports broadband services rather than voice-only delivery.
C. G.fast carries only voice services and does not support broadband data.
D. G.fast requires a separate copper pair for upstream and downstream traffic.
E. G.fast operates only over passive optical splitters.

Answer: A

NEW QUESTION # 24
What is a principal responsibility of the NFV Orchestrator in an NFV environment?

A. Performing physical fiber splicing in the outside plant
B. Assigning Wi-Fi channels independently on every home device
C. Coordinating network-service lifecycle activities and virtualized resources
D. Converting GPON optical signals into subscriber Ethernet signals

Answer: C

Explanation:
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.

NEW QUESTION # 25
In a GPON system using Dynamic Bandwidth Allocation, which device determines when an ONT may transmit upstream traffic?

A. Passive optical splitter
B. Residential gateway
C. Optical line termination
D. Ethernet aggregation switch

Answer: C

Explanation:
The OLT controls upstream access to the shared GPON medium. Multiple ONTs use the same upstream wavelength, so uncoordinated transmissions could overlap and cause collisions. Through Dynamic Bandwidth Allocation, the OLT evaluates bandwidth requirements and assigns upstream transmission grants to the ONTs. These grants specify when an ONT can transmit and how much upstream capacity it may use. Traffic containers, or T-CONTs, help represent different upstream traffic and service requirements. The passive splitter cannot schedule traffic because it has no processing capability. The residential gateway handles subscriber-side functions, while an aggregation switch forwards Ethernet traffic beyond the access network. Centralized upstream scheduling enables efficient bandwidth sharing and helps the operator support different service priorities and performance commitments across subscribers.

NEW QUESTION # 26
A service provider combines two copper pairs to increase the available DSL rate for one subscriber. Which technology is being used?

A. Multicast replication
B. Vectoring
C. Bonding
D. Optical splitting

Answer: C

Explanation:
DSL bonding combines two or more physical copper pairs into a single logical subscriber connection. Traffic is distributed across the available pairs, allowing the aggregate bitrate to increase, provided the individual lines have suitable quality and compatible performance. Bonding can also provide operational benefits where one pair alone cannot deliver the required service rate. It is different from vectoring, which reduces crosstalk among coordinated copper lines by generating compensating signals. Optical splitting divides optical power in a PON and does not combine copper capacity. Multicast replication creates copies of multicast packets for different receiver paths and is unrelated to DSL transmission capacity. Both ends of a bonded DSL connection must support the applicable bonding method and coordinate traffic across the paired lines.

NEW QUESTION # 27
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