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Nokia 4A0-F10 Exam Syllabus Topics:

Section	Objectives
Topic 1: Broadband Services	- Lightspan service components - Internet, IPTV and voice services
Topic 2: Introduction to Fixed Networks	- Broadband access fundamentals - FTTH, FTTx and FWA solutions
Topic 3: Access Network	- OLT functions - Access network architecture - Multicast and QoS principles
Topic 4: Home Network	- Home devices and connectivity - Wi-Fi fundamentals
Topic 5: 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 (Q25-Q30):

NEW QUESTION # 25
What is the primary function of the cladding in an optical fiber?

A. To keep light confined within the fiber core
B. To divide one optical signal among multiple subscribers
C. To convert electrical signals into optical signals
D. To amplify optical signals over long distances

Answer: A

NEW QUESTION # 26
Which Lightspan interface type normally connects an access node directly to subscriber-facing equipment?

A. Network-to-Network Interface
B. Subtending interface
C. User Network Interface
D. Management loopback interface

Answer: C

Explanation:
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.

NEW QUESTION # 27
What is a typical function of the Network Termination card in a Nokia Lightspan access node?

A. It provides Wi-Fi connectivity directly to subscriber mobile devices.
B. It terminates every analog telephone inside the subscriber's home.
C. It operates as the passive splitter in the Optical Distribution Network.
D. It provides external network-facing interfaces through faceplate connectors or optical cages.

Answer: D

Explanation:
The Network Termination card provides network-facing connectivity for a Lightspan access node. Its faceplate can contain connectors and optical cages used to connect the node to external aggregation, transport, management, synchronization, or other supported interfaces. The card participates in forwarding traffic between subscriber-facing line termination resources and the upstream network. It is an active component and must not be confused with a passive optical splitter in the outside plant. It also does not provide in-home Wi-Fi directly to subscriber devices; that function belongs to a residential gateway or Wi-Fi access point. Analog telephones are normally connected through voice-capable subscriber equipment, such as an ONT with appropriate telephone interfaces, rather than directly to the Lightspan NT card.

NEW QUESTION # 28
Which of the following statements correctly distinguishes traffic shaping from traffic policing?

A. Shaping is applied only to optical signals, while policing is applied only to copper signals.
B. Shaping buffers excess traffic, while policing can drop or remark nonconforming traffic.
C. Shaping always drops excess traffic immediately, while policing delays it in a queue.
D. Shaping selects multicast groups, while policing assigns subscriber VLANs.

Answer: B

Explanation:
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.

NEW QUESTION # 29
Why must a managed ONT or residential gateway be reachable before an Auto Configuration Server can provision it using TR-069?

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

Answer: D

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 # 30
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