Verified 4A0-F10 dumps Q&As – 2026 Latest 4A0-F10 Download [Q13-Q29]

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Verified 4A0-F10 dumps Q&As – 2026 Latest 4A0-F10 Download

Updated 100% Cover Real 4A0-F10 Exam Questions – 100% Pass Guarantee

Nokia 4A0-F10 Exam Syllabus Topics:

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

QUESTION 13
In a voice service delivered through an ONT, which component commonly provides signaling toward the operator’s SIP infrastructure?

SIP agent on the ONT

Passive optical splitter

Wi-Fi mesh satellite

IGMP snooping process

A voice-capable ONT commonly contains a SIP agent that handles signaling toward the operator’s SIP registrar and proxy infrastructure. An analog telephone can connect to a telephone interface on the ONT, which converts between the analog user interface and the packet-based voice service. Within the access node, voice traffic can be carried through a voice forwarder and an appropriate VPLS toward the aggregation network. A passive optical splitter merely divides optical power and cannot originate or terminate SIP signaling. A Wi-Fi mesh satellite extends wireless coverage, while IGMP snooping manages Layer 2 forwarding for multicast groups. SIP signaling establishes and manages communication sessions, whereas the actual media stream is commonly carried separately using a real-time transport protocol once the call has been established.

QUESTION 14
Which YANG node type represents multiple scalar values under the same node name without allowing child nodes?

Container

List

Leaf-list

Choice

A YANG leaf-list represents a sequence of scalar values of the same defined type. Like a leaf, each value is terminal and cannot contain child nodes. However, unlike a single leaf, a leaf-list can have multiple entries. A YANG list also supports multiple instances, but each list entry can contain child nodes and is normally identified by one or more key leaves. A container groups related child nodes but does not itself represent a repeated collection of scalar values. A choice defines alternative branches in a data model, allowing one set of nodes from the available cases to be selected. Correctly distinguishing these node types is important when interpreting YANG schemas used to configure and monitor access devices through model-driven management interfaces.

QUESTION 15
Which Corteca component is intended primarily for use by the subscriber during Wi-Fi installation and management?

Corteca mobile application

OLT network termination card

IPFIX collecting process

NETCONF candidate datastore

The Corteca mobile application provides subscriber-facing capabilities that can support self-installation and home Wi-Fi management. Depending on the enabled service, the subscriber can receive installation guidance, view the home network, manage connected devices, and perform supported troubleshooting or configuration tasks. The service provider uses other Corteca platform components for centralized service management, visibility, and operational control. An OLT network termination card provides access-node network connectivity and is not a subscriber application. An IPFIX collector receives traffic-flow records, while a NETCONF candidate datastore holds proposed device configuration before it is committed. Separating subscriber-facing and operator-facing functions allows the provider to offer controlled self-service capabilities without exposing the complete network-management environment or low-level access-device configuration to the end user.

QUESTION 16
A network controller must modify configuration data stored on a NETCONF-capable access device. Which NETCONF operation is designed for this purpose?

<get-config>

<edit-config>

<close-session>

<kill-session>

The NETCONF <edit-config> operation is used to create, change, merge, replace, or delete configuration data in a target configuration datastore. The target can be a datastore such as running or candidate, depending on the capabilities supported by the network device. By comparison, <get-config> retrieves configuration data and does not modify it. <close-session> requests an orderly termination of the current NETCONF session, while <kill-session> forces the termination of another session identified by its session ID. NETCONF operations are carried within RPC messages and commonly transported over a secure protocol such as SSH. YANG models define the structure, types, constraints, and relationships of the configuration and operational data manipulated through NETCONF.

QUESTION 17
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?

Wi-Fi-radio intent

Subscriber-authentication intent

Uplink-connection intent

Multicast-report intent

QUESTION 18
What is the primary benefit of enabling IGMP snooping on a Layer 2 device carrying IPTV multicast traffic?

It converts multicast packets into unicast packets at the video server.

It prevents all hosts from sending IGMP membership reports.

It forwards multicast traffic only toward ports with interested receivers.

It replaces the multicast routing function performed by upstream routers.

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.

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

Optical line termination

Passive optical splitter

Residential gateway

Optical network termination

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.

QUESTION 20
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?

VLAN per subscriber

VLAN per service

One untagged VLAN for the entire access network

One VLAN for every multicast channel

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.

QUESTION 21
What is a key characteristic of software disaggregation in an access network?

Network software functions are separated into distinct modules with defined interfaces.

Every control and forwarding function is permanently embedded in one hardware appliance.

All network-management APIs are removed from the access architecture.

Passive optical splitters execute the access-control software.

Software disaggregation separates access-network software into modules, with each module responsible for a particular functional area. Defined interfaces allow these modules to interact with one another, with higher-level applications, and with abstracted hardware resources. This architecture can improve development flexibility, automation, scalability, and the ability to introduce new functions without replacing an entire vertically integrated platform. It does not mean that all physical constraints disappear or that every module can operate on every device without adaptation. Embedding every function permanently in one appliance describes a tightly integrated architecture rather than disaggregation. APIs are important because they enable communication and programmability between components. Passive optical splitters cannot execute software because they contain no powered processing or control functions.

QUESTION 22
Which Lightspan interface type normally connects an access node directly to subscriber-facing equipment?

User Network Interface

Network-to-Network Interface

Subtending interface

Management loopback interface

A User Network Interface is the subscriber-facing interface through which an access node connects to customer-side equipment or services. Depending on the access technology, this relationship can involve ONTs, subscriber ports, or other access termination functions. A Network-to-Network Interface connects the access node toward another network device, typically the Ethernet aggregation or transport network. A subtending interface is used when one access node is connected through another access node, allowing the downstream node’s traffic to reach the aggregation network through the upstream node. A loopback interface is a logical interface generally used for management, routing identification, or testing and is not a physical subscriber connection. Correctly distinguishing UNI, NNI, and subtending roles is essential when interpreting an access-node datapath.

QUESTION 23
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?

It acts as a DHCP server and assigns private IP addresses to home devices.

It acts only as a DHCP relay and never maintains address information.

It acts as a DHCP client for every device connected to the LAN.

It disables local addressing and assigns public addresses directly from the OLT.

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.

QUESTION 24
Which of the following statements correctly distinguishes traffic shaping from traffic policing?

Shaping buffers excess traffic, while policing can drop or remark nonconforming traffic.

Shaping always drops excess traffic immediately, while policing delays it in a queue.

Shaping selects multicast groups, while policing assigns subscriber VLANs.

Shaping is applied only to optical signals, while policing is applied only to copper signals.

Traffic shaping regulates an outgoing traffic stream by buffering packets that temporarily exceed the configured rate and transmitting them later. This smooths bursts but can introduce additional latency because packets remain in a queue. Traffic policing checks traffic against configured rate limits without normally delaying nonconforming packets. Depending on the policy, packets exceeding the permitted profile can be dropped or marked with a lower priority. Both mechanisms are QoS tools and are independent of whether the physical access medium is fiber, copper, or wireless. They also do not control multicast membership or VLAN assignment. In a fixed-access network, shaping can help produce a smoother egress rate, while policing can enforce subscriber or service bandwidth limits at an ingress boundary.

QUESTION 25
Which traffic-delivery method is commonly used for a live IPTV channel watched simultaneously by many subscribers?

Multicast delivery

Separate analog transmission over every copper pair

NETCONF notifications

Unicast only, with no packet replication in the network

Live IPTV channels are commonly distributed using multicast because many subscribers may request the same content at the same time. The network carries a shared stream across common paths and replicates packets only where delivery paths branch toward participating receivers. Subscribers signal membership using protocols such as IGMP. This approach is more bandwidth-efficient than delivering a separate unicast copy from the source to every viewer. Video on Demand is commonly delivered using unicast because each viewer may start, pause, or seek through different content independently. NETCONF notifications carry management events rather than television content. IPTV is packet-based and does not require a separate analog transmission for every copper pair. Effective multicast deployment also depends on correct group control, snooping, routing, QoS, and service-forwarding configuration.

QUESTION 26
Within the ETSI NFV management and orchestration architecture, which functional block manages virtualized compute, storage, and networking resources?

Virtualized Infrastructure Manager

Virtual Network Functions Manager

Network Management System

Optical Network Termination

The Virtualized Infrastructure Manager manages the compute, storage, and networking resources that form the NFV Infrastructure. Its responsibilities can include allocating resources to virtual workloads, tracking available capacity, and controlling the virtualized environment. The Virtual Network Functions Manager has a different role: it manages the lifecycle of VNF instances, including operations such as instantiation, scaling, updating, and termination. Higher-level NFV orchestration coordinates network services and resources across the NFV environment. A traditional Network Management System can perform fault, configuration, accounting, performance, and security management, but it is not the NFV functional block specifically defined to control virtual infrastructure resources. An ONT is subscriber-premises access equipment and is unrelated to NFV infrastructure resource management.
Batch 2: Questions 11-20

QUESTION 27
Where should multicast traffic ideally be replicated in a bandwidth-efficient access network?

At every receiver before the multicast stream enters the network

Only at points where the delivery path branches toward interested receivers

At the source once for every possible subscriber, including nonmembers

On every access port regardless of multicast group membership

Multicast is bandwidth-efficient because one stream can be transported across shared network sections and replicated only where paths diverge toward interested receivers. Routers and multicast-aware switching functions use membership and forwarding information to determine which interfaces require a copy. This approach avoids sending a separate end-to-end unicast stream for every viewer and avoids flooding the content to subscribers who did not join the group. IGMP reports communicate receiver membership on IPv4 access networks, while IGMP snooping helps Layer 2 devices restrict forwarding to appropriate ports. Replicating content for every possible subscriber at the source would remove much of multicast’s scaling advantage. Likewise, transmitting every stream on every access port would waste bandwidth and could expose receivers to large amounts of unwanted traffic.

QUESTION 28
A QoS policy examines a packet’s markings and assigns it to a forwarding class. Which QoS function is being performed?

Classification

Shaping

Policing

Optical amplification

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.

QUESTION 29
What is a principal responsibility of the NFV Orchestrator in an NFV environment?

Coordinating network-service lifecycle activities and virtualized resources

Converting GPON optical signals into subscriber Ethernet signals

Assigning Wi-Fi channels independently on every home device

Performing physical fiber splicing in the outside plant

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.

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