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| Section | Objectives |
|---|---|
| Software Defined Access Network (SDAN) | - Altiplano Access Controller - Corteca platform - Subscriber and service management - Network topology and service health |
| Nokia fixed access portfolio | - FastMile FWA solutions - Lightspan FX and MF Optical Line Terminals - Optical Network Terminals (ONTs) - Home networking devices |
| Management interfaces and automation | - NETCONF - Telemetry and automation concepts - CLI fundamentals - YANG data models |
| Service delivery and operations | - Voice, Internet and IPTV services - Network monitoring and troubleshooting - High-Speed Internet (HSI) - Service provisioning |
| Fixed network architectures and broadband access | - Optical Distribution Network (ODN) - Broadband network architecture - FTTH and FTTx technologies - Passive Optical Networks (PON) - Fixed Wireless Access (FWA) |
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NEW QUESTION # 38
What is the primary benefit of enabling IGMP snooping on a Layer 2 device carrying IPTV multicast traffic?
Answer: A
Explanation:
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.
NEW QUESTION # 39
In a voice service delivered through an ONT, which component commonly provides signaling toward the operator's SIP infrastructure?
Answer: A
Explanation:
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.
NEW QUESTION # 40
What is a key characteristic of software disaggregation in an access network?
Answer: A
Explanation:
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.
NEW QUESTION # 41
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Answer: B
NEW QUESTION # 42
Which Lightspan interface type normally connects an access node directly to subscriber-facing equipment?
Answer: D
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 # 43
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