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| Section | Objectives |
|---|---|
| Topic 1: Service delivery and operations | - Network monitoring and troubleshooting - Service provisioning - High-Speed Internet (HSI) - Voice, Internet and IPTV services |
| Topic 2: Fixed network architectures and broadband access | - Broadband network architecture - Passive Optical Networks (PON) - Fixed Wireless Access (FWA) - Optical Distribution Network (ODN) - FTTH and FTTx technologies |
| Topic 3: Software Defined Access Network (SDAN) | - Network topology and service health - Subscriber and service management - Corteca platform - Altiplano Access Controller |
| Topic 4: Management interfaces and automation | - NETCONF - Telemetry and automation concepts - CLI fundamentals - YANG data models |
| Topic 5: Nokia fixed access portfolio | - Lightspan FX and MF Optical Line Terminals - Home networking devices - FastMile FWA solutions - Optical Network Terminals (ONTs) |
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NEW QUESTION # 27
An optical link experiences unexpectedly high signal loss immediately after a fiber cable is routed around a very tight corner. What is the most likely cause?
Answer: B
Explanation:
Macrobending occurs when an optical fiber is bent with a radius smaller than its supported minimum bend radius. The excessive bend can cause part of the optical signal to escape from the core, increasing attenuation and reducing the received optical power. This problem can appear after poor cable installation, improper storage, or routing the cable sharply around structural objects. Chromatic dispersion causes different wavelengths or spectral components of an optical pulse to travel at slightly different speeds, but it is not normally triggered by one tight physical corner. DSL crosstalk applies to copper pairs, while Dynamic Bandwidth Allocation controls upstream transmission opportunities in a PON. Correcting the cable routing and respecting the specified bend radius can remove or reduce the loss.
NEW QUESTION # 28
What is the primary function of the cladding in an optical fiber?
Answer: D
NEW QUESTION # 29
Which component of a typical Optical Distribution Network requires no electrical power to perform its primary function?
Answer: B
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 # 30
What is a typical function of the Network Termination card in a Nokia Lightspan access node?
Answer: C
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 # 31
A service provider combines two copper pairs to increase the available DSL rate for one subscriber. Which technology is being used?
Answer: C
Explanation:
DSL bonding combines two or more physical copper pairs into a single logical subscriber connection. Traffic is distributed across the available pairs, allowing the aggregate bitrate to increase, provided the individual lines have suitable quality and compatible performance. Bonding can also provide operational benefits where one pair alone cannot deliver the required service rate. It is different from vectoring, which reduces crosstalk among coordinated copper lines by generating compensating signals. Optical splitting divides optical power in a PON and does not combine copper capacity. Multicast replication creates copies of multicast packets for different receiver paths and is unrelated to DSL transmission capacity. Both ends of a bonded DSL connection must support the applicable bonding method and coordinate traffic across the paired lines.
NEW QUESTION # 32
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