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Nokia 4A0-F10 Exam Syllabus Topics:

Section	Objectives
Home Network	- Home network devices - Home network device management - Home network connectivity - Wi-Fi fundamentals
Broadband Services	- IPTV services - Intent mapping to network layers - Lightspan service components - Value-added and triple-play services - Voice services - High-speed Internet services - Intent-Based Networking (IBN)
Access Network	- Multicast protocols for video distribution - Quality of Service (QoS) fundamentals - Optical Line Terminal (OLT) functionality - Access network architecture
Fixed Networks Management	- Corteca home device controller - IPFIX telemetry collection - NETCONF and YANG - Nokia SDAN solution - NFV and SDN fundamentals - Altiplano SDAN Controller
Introduction to Fixed Networks	- FTTx concepts and solutions - Broadband network fundamentals - Broadband access services - Fixed Wireless Access (FWA) - FTTH concepts and solutions

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Nokia Fixed Networks Fundamentals Sample Questions (Q26-Q31):

NEW QUESTION # 26
Which Wi-Fi 7 capability allows a compatible device to use more than one frequency-band link as part of the same connection?

A. Dynamic Bandwidth Allocation
B. DSL vectoring
C. VLAN stacking
D. Multi-Link Operation

Answer: D

NEW QUESTION # 27
A QoS policy examines a packet's markings and assigns it to a forwarding class. Which QoS function is being performed?

A. Classification
B. Shaping
C. Policing
D. Optical amplification

Answer: A

Explanation:
Classification examines packet information and determines how the packet should be treated by the QoS system. The decision can use fields such as VLAN priority, Differentiated Services Code Point, protocol information, or interface context. After classification, the packet is assigned to an appropriate forwarding class and queue so that scheduling, congestion management, and other policies can provide the intended treatment. Shaping controls an outgoing rate by buffering excess traffic, while policing enforces a traffic profile by dropping or remarking nonconforming packets. Optical amplification increases optical signal power and is unrelated to packet classification. Effective classification is essential when a fixed-access network carries services with different requirements, such as voice, IPTV, management traffic, and best-effort Internet access.

NEW QUESTION # 28
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. G.fast operates only over passive optical splitters.
C. 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.
D. G.fast carries only voice services and does not support broadband data.
E. G.fast requires a separate copper pair for upstream and downstream traffic.

Answer: A

NEW QUESTION # 29
Which of the following statements correctly describes downstream and upstream transmission in a GPON network?

A. Downstream and upstream traffic require separate optical fibers between the OLT and each ONT.
B. Both downstream and upstream traffic are continuously broadcast without coordination by the OLT.
C. Downstream traffic uses time slots assigned individually by each ONT, while upstream traffic is broadcast to all ONTs.
D. Downstream traffic is broadcast from the OLT toward the ONTs, while upstream transmissions use OLT-controlled time slots.

Answer: D

Explanation:
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.

NEW QUESTION # 30
What is the primary benefit of enabling IGMP snooping on a Layer 2 device carrying IPTV multicast traffic?

A. It converts multicast packets into unicast packets at the video server.
B. It forwards multicast traffic only toward ports with interested receivers.
C. It replaces the multicast routing function performed by upstream routers.
D. It prevents all hosts from sending IGMP membership reports.

Answer: B

Explanation:
IGMP snooping allows a Layer 2 device to examine IGMP messages exchanged between multicast receivers and the multicast router or querier. From these messages, the device learns which ports lead to hosts that have joined particular multicast groups. It can then forward each multicast stream only to the relevant ports instead of flooding it throughout the broadcast domain. This conserves access bandwidth and prevents subscribers from receiving unnecessary IPTV traffic. IGMP snooping does not replace multicast routing, which remains a Layer 3 function. It also does not prevent hosts from sending membership reports; those reports are essential for learning group membership. The feature is particularly valuable in fixed-access IPTV deployments where several high-bitrate channels may be transported across shared aggregation and subscriber-facing infrastructure.

NEW QUESTION # 31
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