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| Section | Objectives |
|---|---|
| Topic 1: Fixed network architectures and broadband access | - FTTH and FTTx technologies - Optical Distribution Network (ODN) - Passive Optical Networks (PON) - Fixed Wireless Access (FWA) - Broadband network architecture |
| Topic 2: Service delivery and operations | - Voice, Internet and IPTV services - High-Speed Internet (HSI) - Network monitoring and troubleshooting - Service provisioning |
| Topic 3: Software Defined Access Network (SDAN) | - Corteca platform - Subscriber and service management - Network topology and service health - Altiplano Access Controller |
| Topic 4: Management interfaces and automation | - NETCONF - YANG data models - CLI fundamentals - Telemetry and automation concepts |
| Topic 5: Nokia fixed access portfolio | - Home networking devices - Optical Network Terminals (ONTs) - Lightspan FX and MF Optical Line Terminals - FastMile FWA solutions |
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NEW QUESTION # 17
What is the primary purpose of vectoring in a DSL access network?
Answer: D
Explanation:
DSL vectoring is primarily used to reduce or cancel far-end crosstalk between copper pairs operating within the same cable bundle. Crosstalk can significantly reduce the attainable data rate, particularly with high-frequency technologies such as VDSL2. A vectoring system measures interference among coordinated lines and generates compensating signals that counteract the crosstalk. This can improve connection stability and allow lines to operate closer to their theoretical performance. Vectoring is different from bonding. Bonding combines the capacity of multiple physical copper pairs to increase the aggregate subscriber bitrate. Vectoring also does not divide optical signals because that is the function of a splitter in a passive optical network. Its effectiveness generally depends on coordinating the relevant DSL lines through compatible access equipment.
NEW QUESTION # 18
A network controller must modify configuration data stored on a NETCONF-capable access device. Which NETCONF operation is designed for this purpose?
Answer: A
Explanation:
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.
NEW QUESTION # 19
Which Lightspan interface type normally connects an access node directly to subscriber-facing equipment?
Answer: A
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 # 20
Which architectural principle is fundamental to Software-Defined Networking?
Answer: A
Explanation:
A central principle of Software-Defined Networking is the separation of control logic from packet-forwarding functions. The data plane remains responsible for forwarding traffic, while logically centralized control software determines policies and programs network behavior through defined interfaces. Logically centralized does not necessarily mean that all controller functions run on one physical server; they may be distributed for scalability and resilience while presenting a coordinated control view. SDN emphasizes programmability, automation, abstraction, and the use of APIs. It does not require every forwarding device to independently make all high-level policy decisions. It also avoids tightly coupling every function into one fixed proprietary system. In fixed-access networks, these concepts help operators automate service delivery and manage different access devices through common models and controller applications.
NEW QUESTION # 21
In intent-based networking, what does an operator primarily specify through an intent?
Answer: B
Explanation:
An intent describes the desired network outcome or target state rather than requiring the operator to manually enter every device-level command. The intent system maps the requested outcome to the configurations and resources needed on the relevant network elements. It can then compare the intended state with the observed operational state and take corrective action when supported. Intent types, profiles, and associated models provide the logic and parameters required for this translation. An intent does not normally specify the electrical construction of hardware or list every packet to be forwarded. Optical measurements may be used as operational inputs, but they are not the general definition of an intent. This abstraction improves consistency, supports automation, and reduces repetitive device-by-device configuration work.
NEW QUESTION # 22
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