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Nokia 4A0-F10 Exam Syllabus Topics:

Section	Objectives
Service delivery and operations	- High-Speed Internet (HSI) - Network monitoring and troubleshooting - Service provisioning - Voice, Internet and IPTV services
Nokia fixed access portfolio	- Lightspan FX and MF Optical Line Terminals - Home networking devices - Optical Network Terminals (ONTs) - FastMile FWA solutions
Fixed network architectures and broadband access	- Broadband network architecture - FTTH and FTTx technologies - Passive Optical Networks (PON) - Optical Distribution Network (ODN) - Fixed Wireless Access (FWA)
Management interfaces and automation	- Telemetry and automation concepts - NETCONF - CLI fundamentals - YANG data models
Software Defined Access Network (SDAN)	- Network topology and service health - Subscriber and service management - Altiplano Access Controller - Corteca platform

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Nokia Fixed Networks Fundamentals Sample Questions (Q18-Q23):

NEW QUESTION # 18
An optical link experiences unexpectedly high signal loss immediately after a fiber cable is routed around a very tight corner. What is the most likely cause?

A. DSL crosstalk
B. Dynamic bandwidth allocation
C. Chromatic dispersion
D. Excessive macrobending

Answer: D

Explanation:
Macrobending occurs when an optical fiber is bent with a radius smaller than its supported minimum bend radius. The excessive bend can cause part of the optical signal to escape from the core, increasing attenuation and reducing the received optical power. This problem can appear after poor cable installation, improper storage, or routing the cable sharply around structural objects. Chromatic dispersion causes different wavelengths or spectral components of an optical pulse to travel at slightly different speeds, but it is not normally triggered by one tight physical corner. DSL crosstalk applies to copper pairs, while Dynamic Bandwidth Allocation controls upstream transmission opportunities in a PON. Correcting the cable routing and respecting the specified bend radius can remove or reduce the loss.

NEW QUESTION # 19
Which component of a typical Optical Distribution Network requires no electrical power to perform its primary function?

A. Optical network termination
B. Optical line termination
C. Residential gateway
D. Passive optical splitter

Answer: D

Explanation:
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.

NEW QUESTION # 20
Why must a managed ONT or residential gateway be reachable before an Auto Configuration Server can provision it using TR-069?

A. TR-069 requires an active management session with the device.
B. TR-069 can configure only devices that are physically inside the central office.
C. TR-069 communicates exclusively through an OLT serial console.
D. TR-069 writes configuration directly to a passive splitter.

Answer: A

Explanation:
TR-069 enables remote management through communication between customer-premises equipment and an Auto Configuration Server. The device must be powered, operational, and able to establish or participate in a management session before configuration parameters, software information, diagnostics, or status data can be exchanged. An ACS cannot provision a device that is completely offline because no active communication path exists. TR-069 does not configure passive splitters, which contain no management processor or configurable service logic. The managed device can be located at the subscriber premises and does not need to be inside the central office. Communication is carried over the device's network connection rather than exclusively through an OLT serial console. Authentication and protected transport help secure management exchanges between the device and the ACS.

NEW QUESTION # 21
In an IPFIX deployment, which component observes traffic and sends flow records to a receiving system?

A. Passive optical splitter
B. SIP registrar
C. 802.1X supplicant
D. Exporting process

Answer: D

Explanation:
An IPFIX exporting process observes traffic at an observation point, creates flow records, and sends those records to an IPFIX collecting process. Templates describe the fields contained in the exported records, allowing the collector to interpret information such as source and destination addresses, transport ports, protocol identifiers, counters, and timestamps. The collector can store and analyze these records for traffic visibility, capacity planning, troubleshooting, accounting, or security analysis. IPFIX does not permanently store all collected information on the exporting network device. A passive optical splitter cannot inspect or export traffic because it has no active processing functions. An 802.1X supplicant participates in access authentication, while a SIP registrar maintains information used to locate SIP users or endpoints.

NEW QUESTION # 22
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. 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. 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.

Answer: A

NEW QUESTION # 23
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