Simulation 4A0-F10 Questions & 4A0-F10 Verified Answers

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Nokia 4A0-F10 Exam Syllabus Topics:

SectionObjectives
Topic 1: Broadband Services- Lightspan service components
- Intent-Based Networking (IBN)
- Value-added and triple-play services
- High-speed Internet services
- Voice services
- IPTV services
- Intent mapping to network layers
Topic 2: Fixed Networks Management- Altiplano SDAN Controller
- NFV and SDN fundamentals
- NETCONF and YANG
- Corteca home device controller
- IPFIX telemetry collection
- Nokia SDAN solution
Topic 3: Home Network- Wi-Fi fundamentals
- Home network connectivity
- Home network device management
- Home network devices
Topic 4: Access Network- Multicast protocols for video distribution
- Quality of Service (QoS) fundamentals
- Access network architecture
- Optical Line Terminal (OLT) functionality
Topic 5: Introduction to Fixed Networks- FTTx concepts and solutions
- Broadband access services
- Broadband network fundamentals
- FTTH concepts and solutions
- Fixed Wireless Access (FWA)

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Nokia Fixed Networks Fundamentals Sample Questions (Q23-Q28):

NEW QUESTION # 23
A YANG model specifies that a configuration leaf can contain an integer from 1 through 4094. What is the principal benefit of this restriction?

Answer: B

Explanation:
YANG can define data types, ranges, patterns, mandatory nodes, default values, and relationships between configuration elements. A range restriction allows management software and network devices to verify that a submitted value falls within the permitted limits. For example, restricting a VLAN-related integer to an appropriate range prevents clearly invalid values from being accepted. This model-driven validation reduces configuration errors and makes automation more predictable. A passive optical splitter has no processing capability and cannot correct invalid configuration. The restriction also does not convert a value into an Ethernet frame or prevent NETCONF access. Instead, NETCONF can carry configuration data structured according to the YANG model, and the server can reject an <edit-config> request when the proposed data violates applicable schema constraints.


NEW QUESTION # 24
A QoS policy examines a packet's markings and assigns it to a forwarding class. Which QoS function is being performed?

Answer: D

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 # 25
Which component of a typical Optical Distribution Network requires no electrical power to perform its primary function?

Answer: A

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 # 26
What does hardware abstraction provide in a disaggregated access network?

Answer: C

Explanation:
Hardware abstraction separates higher-level control and management functions from many platform-specific implementation details. It can provide controllers and applications with consistent models or interfaces for operating different supported hardware platforms. This makes automation, service development, and multivendor management more practical because applications do not need to reproduce every low-level procedure for each device. Abstraction does not require all platforms to contain identical components, nor does it eliminate actual differences in capacity, features, or operational constraints. Those differences must still be represented where relevant. It also does not make active access equipment passive. In a disaggregated access architecture, software is divided into functional modules, and standardized or well-defined interfaces allow those modules to interact with abstracted device resources and with higher-level orchestration or assurance applications.


NEW QUESTION # 27
In a Lightspan High-Speed Internet service architecture, what is the role of the HSI VPLS on the IHUB?

Answer: D

Explanation:
The HSI VPLS on the integrated hub provides the Layer 2 switching context used to carry High-Speed Internet traffic between HSI forwarders and the network-facing side of the access node. Subscriber traffic arriving through an ONT is associated with an HSI forwarder on the relevant line termination resources. The forwarder connects that traffic to the HSI VPLS, which then switches it toward one or more NNIs leading to the aggregation network. The VPLS does not perform optical-to-analog voice conversion, Wi-Fi radio management, or DSL vectoring. Those functions belong to different service components or technologies. This logical service architecture allows subscriber-facing resources and network-facing interfaces to participate in a controlled Ethernet forwarding domain while supporting the required service separation and policies.


NEW QUESTION # 28
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