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| Section | Objectives |
|---|---|
| Fixed network architectures and broadband access | - Broadband network architecture - Passive Optical Networks (PON) - Optical Distribution Network (ODN) - FTTH and FTTx technologies - Fixed Wireless Access (FWA) |
| Nokia fixed access portfolio | - Lightspan FX and MF Optical Line Terminals - Optical Network Terminals (ONTs) - Home networking devices - FastMile FWA solutions |
| Software Defined Access Network (SDAN) | - Network topology and service health - Subscriber and service management - Corteca platform - Altiplano Access Controller |
| Service delivery and operations | - Voice, Internet and IPTV services - Network monitoring and troubleshooting - High-Speed Internet (HSI) - Service provisioning |
| Management interfaces and automation | - CLI fundamentals - Telemetry and automation concepts - YANG data models - NETCONF |
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NEW QUESTION # 35
A service provider combines two copper pairs to increase the available DSL rate for one subscriber. Which technology is being used?
Answer: D
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 # 36
What is the primary function of the cladding in an optical fiber?
Answer: B
Explanation:
The cladding surrounds the optical fiber core and has a lower refractive index than the core. This difference causes light to remain confined within the core through total internal reflection, allowing the optical signal to travel along the fiber. The cladding does not generate or amplify light; transmitters and optical amplifiers perform those functions. It also does not divide an optical signal among subscribers, which is the role of a passive optical splitter in an Optical Distribution Network. Outside the cladding, protective coatings and buffers help protect the glass from moisture, bending, and mechanical damage. The core and cladding therefore perform essential optical functions, while the surrounding protective layers primarily provide physical protection.
NEW QUESTION # 37
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Answer: A
NEW QUESTION # 38
In a GPON system using Dynamic Bandwidth Allocation, which device determines when an ONT may transmit upstream traffic?
Answer: C
Explanation:
The OLT controls upstream access to the shared GPON medium. Multiple ONTs use the same upstream wavelength, so uncoordinated transmissions could overlap and cause collisions. Through Dynamic Bandwidth Allocation, the OLT evaluates bandwidth requirements and assigns upstream transmission grants to the ONTs. These grants specify when an ONT can transmit and how much upstream capacity it may use. Traffic containers, or T-CONTs, help represent different upstream traffic and service requirements. The passive splitter cannot schedule traffic because it has no processing capability. The residential gateway handles subscriber-side functions, while an aggregation switch forwards Ethernet traffic beyond the access network. Centralized upstream scheduling enables efficient bandwidth sharing and helps the operator support different service priorities and performance commitments across subscribers.
NEW QUESTION # 39
A subscriber installs several coordinated Wi-Fi access points to provide consistent coverage throughout a large home. What type of solution is this?
Answer: B
Explanation:
A Wi-Fi mesh system uses multiple coordinated Wi-Fi nodes or access points to extend wireless coverage across a home or other large area. The nodes operate as part of one managed system and can steer clients or select paths to improve coverage and user experience. This differs from a single Wi-Fi router, which combines routing, switching, and wireless access functions in one device but may not adequately cover a large property. A passive optical network delivers fiber access and does not describe the in-home wireless topology. DSL bonding combines copper pairs, while a virtual network function is a software implementation of a network function running on virtualized infrastructure. Placement, backhaul quality, interference, and radio-resource management all affect mesh performance.
NEW QUESTION # 40
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